Android 字体适配的各种场景- https://github.com/wildma/FontAdaptation

-- TextView中的.setText和.append的区别:
setText()把以前的内容冲掉了,append()在以前的内容后面添加。

-- TextView用drawableLeft/Right时,改变文字和图片间的距离: 
利用drawablePadding属性:android:drawablePadding="@dimen/five_dp"

-- Android TextView设置空格
  代码里TextView.setText("\u3000");  xml里( );

<TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="一九八六年&#160;农历乙丑年&#160;七月二十八日" />

-- TextView 使用setMovementMethod滑动,TextView添加链接-setMovementMethod
 在布局文件中 设置 TextView属性 android:scrollbars="vertical"
 在代码中 textview.setMovementMethod(ScrollingMovementMethod.getInstance());
 ps:设置滑动属性后,触摸时颜色可能会变,可以设置字体颜色为白色即可:android:textColor="#FFFFFF" 

textView.setMovementMethod(LinkMovementMethod.getInstance());设置此方法才能使点击处理生效。

-- TextView的textIsSelectable属性和setMovementMethod()
 TextView的textIsSelectable属性可以支持长按文字可以复制,搜索等,而且支持对TextView的内容滑动。
 TextView的setMovementMethod()方法,也可以支持对TextView的内容滑动,但对Textview内容不支持长按文字可以复制,搜索等。

-- 点击TextView发布人或评论人的昵称查看详情,支持超链接,支持emoji表情,
  利用ClickableSpan让TextView支持高亮点击,我们新建几个类继承ClickableSpan,一般我们有两个方法需要重写,分别是updateDrawState和onClick,默认情况下此时TextView会显示默认的主题颜色和有下划线;SpannableString来设置;
Apache Commons Lang- http://commons.apache.org/proper/commons-lang/download_lang.cgi
//把字符串转为unicode编码
StringEscapeUtils.escapeJava(etContent.getText().toString())
//解码unicode编码
StringEscapeUtils.unescapeJava(data.getContent())
通过转码和解码我们就可以支持emoji表情

-- 如何实现 “中间这几个字要加粗,但是不要太粗,比较纤细的那种粗” ?
 1. A helper class that extends SpannableStringBuilder and adds methods to easily mark the text with multiple spans.- https://github.com/binaryfork/Spanny
Spanny spanny = new Spanny("Underline text", new UnderlineSpan())
                .append("\nBold text", new StyleSpan(Typeface.BOLD))
                .append("\nPlain text");
textView.setText(spanny);

 2. span+画笔处理. //没错,就几行代码这么简单
public class FakeBoldSpan extends CharacterStyle {

@Override
  public void updateDrawState(TextPaint tp) {
      tp.setFakeBoldText(true);//一种伪粗体效果,比原字体加粗的效果弱一点
      // tp.setStyle(Paint.Style.FILL_AND_STROKE);
      // tp.setColor(Color.RED);//字体颜色
      // tp.setStrokeWidth(10);//控制字体加粗的程度
  }
 }
 //使用:
 fakeBoldText.setText(new Spanny().append("FakeBold",new FakeBoldSpan()));设置一下Span的画笔:
         tp.setStyle(Paint.Style.FILL_AND_STROKE);
         tp.setColor(Color.RED);//字体颜色
         tp.setStrokeWidth(10);//控制字体加粗的程度-- textview左右文字对齐
 public class AlignTextView extends AppCompatTextView {    private boolean alignOnlyOneLine;
    public AlignTextView(Context context) {
         this(context, null);
     }    public AlignTextView(Context context, @Nullable AttributeSet attrs) {
         this(context, attrs, 0);
     }    public AlignTextView(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
         init(context, attrs);
     }    private void init(Context context, AttributeSet attrs) {
         TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AlignTextView);
         alignOnlyOneLine = typedArray.getBoolean(R.styleable.AlignTextView_alignOnlyOneLine, false);
         typedArray.recycle();
     }    protected void onDraw(Canvas canvas) {
         CharSequence content = getText();
         if (!(content instanceof String)) {
             super.onDraw(canvas);
             return;
         }
         String text = (String) content;
         Layout layout = getLayout();        for (int i = 0; i < layout.getLineCount(); ++i) {
             int lineBaseline = layout.getLineBaseline(i) + getPaddingTop();
             int lineStart = layout.getLineStart(i);
             int lineEnd = layout.getLineEnd(i);
             if (alignOnlyOneLine && layout.getLineCount() == 1) {//只有一行
                 String line = text.substring(lineStart, lineEnd);
                 float width = StaticLayout.getDesiredWidth(text, lineStart, lineEnd, getPaint());
                 this.drawScaledText(canvas, line, lineBaseline, width);
             } else if (i == layout.getLineCount() - 1) {//最后一行
                 canvas.drawText(text.substring(lineStart), getPaddingLeft(), lineBaseline, getPaint());
                 break;
             } else {//中间行
                 String line = text.substring(lineStart, lineEnd);
                 float width = StaticLayout.getDesiredWidth(text, lineStart, lineEnd, getPaint());
                 this.drawScaledText(canvas, line, lineBaseline, width);
             }
         }    }
    private void drawScaledText(Canvas canvas, String line, float baseLineY, float lineWidth) {
         if (line.length() < 1) {
             return;
         }
         float x = getPaddingLeft();
         boolean forceNextLine = line.charAt(line.length() - 1) == 10;
         int length = line.length() - 1;
         if (forceNextLine || length == 0) {
             canvas.drawText(line, x, baseLineY, getPaint());
             return;
         }        float d = (getMeasuredWidth() - lineWidth - getPaddingLeft() - getPaddingRight()) / length;
        for (int i = 0; i < line.length(); ++i) {
             String c = String.valueOf(line.charAt(i));
             float cw = StaticLayout.getDesiredWidth(c, this.getPaint());
             canvas.drawText(c, x, baseLineY, this.getPaint());
             x += cw + d;
         }
     }
 }<declare-styleable name="AlignTextView">
     <attr name="alignOnlyOneLine" format="boolean"/>
 </declare-styleable>> TextView
 TextView原理,SpannableString与SpannableStringBuilder- 
 实现类似新浪微博帖子显示,话题、@好友、表情解析工具类- 
 话题、@好友、表情解析工具类- https://github.com/LineChen/SpannableStringDemo TextView垂直向上滚动的- https://github.com/sfsheng0322/MarqueeView 仿淘宝首页的淘宝头条View垂直滚动-https://github.com/dreamlivemeng/UpMarqueeTextView-master 
 TextSwitcher实现文字上下翻牌效果- 
 TextSwitcher实现分析- 
 Android 天气预报图文字幕垂直滚动效果- 
 androidTV文字动画 HTextView,Animation effects to text, not really textview- https://github.com/hanks-zyh/HTextViewAndroid实现TextView字符串波浪式跳动- https://github.com/frakbot/JumpingBeans
android状态栏背景及文字变色- https://github.com/hongyangAndroid/ColorTrackView
-- 自定义MarqueeView详解- https://github.com/sunfusheng/MarqueeView
 自定义MarqueeView详解- https://github.com/gdutxiaoxu/MarqueeView
 Android基于自定义TextView的垂直跑马灯效果- https://github.com/viclee2014/VerticalSwitchTextView
 Android-垂直上下滚动的TextView- https://github.com/paradoxie/AutoVerticalTextview -- 安卓TextView完美展示html格式代码- 
 Android HTML rendering library with CSS support- https://github.com/NightWhistler/HtmlSpanner
 textView.setText(htmlSpanner.fromHtml(html));
 textView.setText(Html.fromHtml(content));-- 获取TextView上文字宽度
 可自定义下划线颜色和宽度的TextView- https://github.com/lixiaote/UnderLineTextView
 Android TextView加中划线,下划线- 
 A TextView that automatically fit its font and line count based on its available size and content- https://github.com/AndroidDeveloperLB/AutoFitTextView
 Android TextView利用measureText自适应文本字体大小宽度- 
 可定制文字与下划线等宽- -- 这样的话,就不用去拼字符串; Html.fromHtml显示各种颜色的文字
 String result = "实时更新中,当前大盘指数:<font color='red'>%d</font>";
 result = String.format(result, (int) (Math.random() * 3000 + 1000));
 TextView.setText(Html.fromHtml(result));> 直接给TextView加图片,通过 setCompoundDrawable 方法, 或者直接在xml中使用android:drawableLeft.、
 android:drawableRight等属性指定!<TextView
         android:id="@+id/common_all_workbenchs"
         style="@style/common_textSize_color_14"
         android:layout_width="45dip"
         android:layout_height="wrap_content"
         android:layout_alignParentRight="true"
         android:layout_centerVertical="true"
         android:layout_marginRight="7dip"
         android:drawableRight="@drawable/list_right_arrow"
         android:text="@string/common_all_workbenchs_text" />> TextView设置最多显示8个字符,超过部分显示...(省略号),网上找了很多资料,有人说分别设置TextView的
 android:signature="true",并且设置android:ellipsize="end";
 1、android:lineSpacingExtra 设置行间距,如”3dp”。
 2、android:lineSpacingMultiplier 设置行间距的倍数,如”1.2″。
 <TextView
         android:id="@+id/common_forth_process"
         style="@style/common_textSize_16"
         android:layout_width="60.0dip"
         android:layout_height="60.0dip"
         android:layout_centerHorizontal="true"
         android:background="@drawable/common_apply_leave"
         android:contentDescription="@null"
         android:ellipsize="end"
         android:gravity="center"
         android:maxEms="2"
         android:singleLine="true"
         android:text="@string/common_apply_leave_text"
         android:textColor="@color/white_color" />> 两行,每行显示两个字
 <LinearLayout
         android:layout_width="60.0dip"
         android:layout_height="60.0dip"
         android:layout_centerHorizontal="true"
         android:background="@drawable/common_apply_leave"
         android:gravity="center"
         android:orientation="horizontal">        <TextView
             android:id="@+id/common_forth_process"
             style="@style/common_textSize_16"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:contentDescription="@null"
             android:ems="2"
             android:text="@string/common_apply_leave_text"
             android:textColor="@color/white_color" />
     </LinearLayout>> TextView实现图片和文字展示
  textView.setText(Html.fromHtml(string, imageGetter, null)); SpannableString
 SpannableString spannableString1 = new SpannableString("身份:表情,电视购物 萨嘎,嘎嘎而 噶噶关闭安管部阿热感二胡版安放的噶尔gear回合肥 发发发发发发  发发发有营养UU骨干一样");
         Drawable drawable = getResources().getDrawable(R.mipmap.icon_back);
         //设置图片的尺寸
         drawable.setBounds(0, 0, 42, 50);
         ImageSpan imageSpan = new ImageSpan(drawable);
         //“表情”是占位置的,图片会把其替换掉,3和5是其索引位置,含头不含尾
         spannableString1.length();
 //        spannableString1.setSpan(imageSpan, 3, 5 , SPAN_INCLUSIVE_EXCLUSIVE);
         spannableString1.setSpan(imageSpan, spannableString1.length()-2, spannableString1.length(), SPAN_INCLUSIVE_EXCLUSIVE);
         TextView showTv2 = (TextView) myView.findViewById(R.id.show_tv2);
         showTv2.setText(spannableString1);

Android TextView中的文字通过SpannableString,设置不同的颜色,字体,不同文字段的点击事件-
android TextView加SpannableString设置点击某几个文字的问题-
TextView+SpannableString实现Android中富文本的显示及点击冲突解决-
Android SpannableString实现TextView的点击事件-
 

> TextView渲染机制与优化
TextView中负责渲染文字的主要是这三个类:
  1.BoringLayout:主要负责显示单行文本,并提供了isBoring方法来判断是否满足单行文本的条件。
  2.DynamicLayout:当文本为Spannable的时候,TextView就会使用它来负责文本的显示,在内部设置了SpanWatcher,当检测到span改变的时候,会进行reflow,重新计算布局。
  3.StaticLayout:当文本为非单行文本,且非Spannable的时候,就会使用StaticLayout,内部并不会监听span的变化,因此效率上会比 DynamicLayout高,只需一次布局的创建即可,但其实内部也能显示SpannableString,只是不能在span变化之后重新进行布局而已。

-- TextView性能瓶颈,渲染优化,以及StaticLayout的一些用处- https://www.jianshu.com/p/9f7f9213bff8
 TextView高频度绘图下的问题,在一些场景下,比如界面上有大量的聊天并且活跃度高,内容包含了文字,emoji,图片等各种信息的复杂文本,采用TextView来展示这些内容信息。就容易观察到,聊天消息在频繁刷新的时候,性能有明显下降,GPU火焰图抖动也更加频繁。
 
 - StaticLayout的用途:
a.文中高频度大量textview刷新优化。
b.一个textview显示大量的文本,比如一些阅读app。
c. 在控件上画文本,比如一个ImageView中心画文本。
d. 一些排版效果,比如多行文本文字居中对齐等。

- 自定义View如下:
 public class StaticLayoutView extends View {
         private Layout layout;
         private int width ;
         private int height;        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
         public StaticLayoutView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
             super(context, attrs, defStyleAttr, defStyleRes);
         }        public StaticLayoutView(Context context, AttributeSet attrs, int defStyleAttr) {
             super(context, attrs, defStyleAttr);
         }        public StaticLayoutView(Context context, AttributeSet attrs) {
             super(context, attrs);
         }        public StaticLayoutView(Context context) {
             super(context);
         }        public void setLayout(Layout layout) {
             this.layout = layout;
             if (this.layout.getWidth() != width || this.layout.getHeight() != height) {
                 width = this.layout.getWidth();
                 height = this.layout.getHeight();
                 requestLayout();
             }
         }        @Override
         protected void onDraw(Canvas canvas) {
             super.onDraw(canvas);
             canvas.save();
             if (layout != null) {
                 layout.draw(canvas, null, null, 0);
             }
             canvas.restore();
         }        @Override
         protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
             super.onLayout(changed, left, top, right, bottom);
         }        @Override
         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
             if (layout != null) {
                 setMeasuredDimension(layout.getWidth(), layout.getHeight());
             } else {
                 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
             }
         }
     }


 
> textview上的文字分散对齐
-- textview上的文字分散对齐- https://github.com/ufo22940268/Android-justifiedtextviewhttps://github.com/ufo22940268/android-justifiedtextview/blob/master/justifytext-library/library_justifytext/src/main/java/me/biubiubiu/justifytext/library/JustifyTextView.java ,这个类是比较正常的
  默认Textview在一行快要结束的时候,如果在符号后面,有一个长的字符串,这时候,TextView就会自动换行,导致排版会参差不齐,而自动换行导致混乱的原因了是半角字符与全角字符占位不同,一般情况下,我们输入的数字、字母以及英文标点都是半角,中文是全角,因此占位的位置大家都不同。在中英文混输的时候,导致很多文字的排版都是参差不齐的。
  那么要想要解决此问题就在解决它们的占位问题,网上有种思路是把半角符号的数字和英文全部转化为全角,这样一个字符就和中文字符对齐了。但是这样的话,就会使英文字母和英文字母之间分的很开,导致十分的难看。下面我们就开始来解决排版的问题。
  我们先了解下StaticLayout(This is used by widgets to control text layout. ),这个东西,TextView中就是使用StaticLayout来进行文字的排版处理。而我们这边需要让它来预处理下排版的分布,然后根据其提供的getDesiredWidth(CharSequence source, TextPaint paint)方法来判断一行文字本来需要的宽度值,再固定一行的宽度值,利用
固定的宽度 - 文本宽度 / 文本字数 = 每个文字的间距。这个方法来计算出排版对齐时,每个文字之间的距离。
【1】 在TextView中用android:text="测试     文字"的时候,可以正常显示正确的空格数。但是如果使用资源文件android:text="@string/txt"的时候,不管我资源文件里面<string name="txt">测试         文字</string>;中间使用多少个空格,或者TAB。在模拟器上运行的时候,N个空格都只显示一个,解决办法:使用全角空格。
这个用途估计只有在设计登陆框的时候能用吧,比如下面这样。
用户名:
密    码:
解决方案如下:
【2】 http://stackoverflow.com/questions/1587056/android-string-concatenate-how-to-keep-the-spaces-at-the-end-and-or-beginnin
 1.Even if you use string formatting sometimes you still need whitespaces at the beginning or the end. On these cases neither escaping with \ nor xml:space attribute helpes. You must use xml encoding&#160;for whitespaces。eg:&#160,表示全角空格,<string name="aaa">你好&#160;&#160;&#160;&#160;&#160;&#160;啊</string>
 2.I found a solution on this issue report : http://code.google.com/p/android-apktool/issues/detail?id=14
  This is the same idea that Duessi suggests. Insert \u0020 directly in the XML for a blank you would like to preserve.
  Example :
<string name="your_id">Score :\u0020</string>
The replacement is done at build time, therefore it will not affect the performance of your game
【3】加“\t”可能有对齐效果

--  android textview自动换行、排列错乱问题及解决
 半角字符与全角字符混乱所致!即将所有的数字、字母及标点全部转为全角字符,使它们与汉字同占两个字节,这样就可以避免由于占位导致的排版混乱问题了。
 /** 
      * 半角转换为全角 
      *  
      * @param input 
      * @return 
      */  
     public static String ToDBC(String input) {  
         char[] c = input.toCharArray();  
         for (int i = 0; i < c.length; i++) {  
             if (c[i] == 12288) {  
                 c[i] = (char) 32;  
                 continue;  
             }  
             if (c[i] > 65280 && c[i] < 65375)  
                 c[i] = (char) (c[i] - 65248);  
         }  
         return new String(c);  
     }  
 /** 
      * 去除特殊字符或将所有中文标号替换为英文标号 
      *  
      * @param str 
      * @return 
      */  
     public static String stringFilter(String str) {  
         str = str.replaceAll("【", "[").replaceAll("】", "]")  
                 .replaceAll("!", "!").replaceAll(":", ":");// 替换中文标号  
         String regEx = "[『』]"; // 清除掉特殊字符  
         Pattern p = Pattern.compile(regEx);  
         Matcher m = p.matcher(str);  
         return m.replaceAll("").trim();  
     } > webview中,可以对文本内容进行对齐
 Android阅读器如何实现文字两端对齐,达到类似iReader一样的效果??
 【1】在android中的webview中,可以对文本内容进行对齐,具体方法如下:
 public class MainActivity extends Activity {
 @Override  
 protected void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.activity_main); 
  
     String htmlText = " %s ";  
     String myData = "Hello World! This tutorial is to show demo of displaying text with justify alignment in WebView.";  
     WebView webView = (WebView) findViewById(R.id.webView1);  
     webView.loadData(String.format(htmlText, myData), "text/html", "utf-8");  
 }  }
 【2】方案二:使用textView改造:首先设置TextView的显示字体大小和文本内容,这里设置字体大小根据屏幕尺寸调整。然后调用自定义的类Textustification中的justify方法来实现TextView的分散对齐,两个参数分别是TextView控件以及控件的宽度。
   MainActivity中:
  Display display = getWindowManager().getDefaultDisplay();
  DisplayMetrics dm = new DisplayMetrics();
  display.getMetrics(dm);
  width = dm.widthPixels;
   //根据屏幕调整文字大小
  mArticleTextView.setLineSpacing(0f, 1.5f);
  mArticleTextView.setTextSize(8*(float)width/320f);
   //设置TextView
  mArticleTextView.setText("TextView需要显示的文本内容");
  TextJustification.justify(mArticleTextView,mArticleTextView.getWidth());-- 自定义的类TextJustification内容如下:
 import java.util.ArrayList;
 import android.graphics.Paint;
 import android.text.TextUtils;
 import android.widget.TextView;
 import android.widget.TextView.BufferType;
 public class TextJustification {
 public static void justify(TextView textView, float contentWidth) {
     String text=textView.getText().toString();
     String tempText;
     String resultText = "";
     Paint paint=textView.getPaint();    ArrayList<String> paraList = new ArrayList<String>();       
     paraList = paraBreak(text);       
     for(int i = 0; i<paraList.size(); i++) {           
         ArrayList<String> lineList=lineBreak(paraList.get(i).trim(),paint,contentWidth);           
         tempText = TextUtils.join(" ", lineList).replaceFirst("\\s*", "");           
         resultText += tempText.replaceFirst("\\s*", "") + "\n";       
     }                   textView.setText(resultText);
 }
 //分开每个段落
 public static ArrayList<String> paraBreak(String text, TextView textview) {
     ArrayList<String> paraList = new ArrayList<String>();
     String[] paraArray = text.split("\\n+");
        for(String para:paraArray) {
            paraList.add(para);
     }
     return paraList;
 }//分开每一行,使每一行填入最多的单词数
 private static ArrayList<String> lineBreak(String text, Paint paint, float contentWidth){
     String [] wordArray=text.split("\\s");
     ArrayList<String> lineList = new ArrayList<String>();
     String myText="";    for(String word:wordArray){
         if(paint.measureText(myText+" "+word)<=contentWidth)
             myText=myText+" "+word;
         else{
             int totalSpacesToInsert=(int)((contentWidth-paint.measureText(myText))/paint.measureText(" "));
             lineList.add(justifyLine(myText,totalSpacesToInsert));
             myText=word;
         }
     }
     lineList.add(myText);
     return lineList;
 }
 //已填入最多单词数的一行,插入对应的空格数直到该行满
 private static String justifyLine(String text,int totalSpacesToInsert){
     String[] wordArray=text.split("\\s");
     String toAppend=" ";     while((totalSpacesToInsert)>=(wordArray.length-1)){
         toAppend=toAppend+" ";
         totalSpacesToInsert=totalSpacesToInsert-(wordArray.length-1);
     }
     int i=0;
     String justifiedText="";
     for(String word:wordArray){
         if(i<totalSpacesToInsert)
             justifiedText=justifiedText+word+" "+toAppend;
         else               
             justifiedText=justifiedText+word+toAppend;
         i++;
     }    return justifiedText;
 }
 }这个类完成了TextView内部文字的排版工作,主要分3个步骤:
 1、将一篇文章按段落分成若干段(如果只有一段可以略去该步骤);
 2、将每一段的文字拆分成各个单词,然后根据控件长度确定每一行最多可以填入的单词数,并且算出排满该行还需要填入几个空格。
 3、填入空格。> TextView头部和尾部缩进、分散对齐,webView加载页面也是一种方案
 解决Android中TextView首行缩进的问题- 
 TextView改变部分字体的大小和颜色及首行缩进-   首行缩进:
 方式一:(推荐)setText("\u3000\u3000"+xxxxx);
 方式二:这种方式不同分辨率会有问题 setText(""+xxxxx); 半角:\u0020;全角:\u3000android TextView 分散对齐(两端对齐) http://www.tuicool.com/articles/6b6nUbY
 AlignTextView- https://github.com/androiddevelop/AlignTextView 
 两端分散对齐的Textview- > android里TextView加下划线的几种方式
 如果是在资源文件里:
  <resources>
     <string name="hello"><u>phone:0123456</u></string>
     <string name="app_name">MyLink</string>
 </resources>
 如果是代码里:
 TextView textView = (TextView)findViewById(R.id.tv_test); 
 textView.setText(Html.fromHtml("<u>"+"0123456"+"</u>"));代码也可以这样:Android TextView 添加下划线的几种方式- 
 tvTest.getPaint().setFlags(Paint. UNDERLINE_TEXT_FLAG ); //下划线
 tvTest.getPaint().setAntiAlias(true);//抗锯齿 Android TextView 添加下划线的几种方式- 
 android:autoLink="all"> TextView的跑马灯效果
 TextView的跑马灯效果以及TextView的一些属性- 
  android中TextView跑马灯效果-
   <TextView  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"    
     android:id="@+id/notice"    
     android:background="@color/black20"     
     android:text="他们说这里是要放广告的,就是看看能不能动啊!长点...!!!!..."    
     android:ellipsize="marquee"    
     android:gravity="center"    
     android:textStyle="bold"    
     android:focusable="true"    
     android:marqueeRepeatLimit="marquee_forever"    
     android:focusableInTouchMode="true"    
     android:scrollHorizontally="true"    
     android:singleLine="true"  
     android:textSize="@dimen/activity_Textsize15_4.0"    
   />> TextView中Text与pic设置间距
 android:drawablePadding="5dip"> Android Studio中xml文件中的TextView的text中字符串属性默认大写- 
 <item name="android:textAllCaps">false</item>, 
 android:textAllCaps="false"> textview动态设置 DrableLeft 以及改变图片大小
 if (i_count==0){
             Drawable drawable1= getResources().getDrawable(R.drawable.ic_news_comment_write);
 /// 这一步必须要做,否则不会显示.
             drawable1.setBounds(0, 0, 30, 30);
             tvComment.setCompoundDrawables(drawable1,null,null,null);
 //            tvComment.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_news_comment_write,0,0,0);
             tvComment.setText("写评论");
         }else {
             Drawable drawable2= getResources().getDrawable(R.drawable.ic_comment_top);
 /// 这一步必须要做,否则不会显示.
             drawable2.setBounds(0, 0, drawable2.getMinimumWidth(), drawable2.getMinimumHeight());
             tvComment.setCompoundDrawables(drawable2,null,null,null);
             tvComment.setText(" "+count + " 评论");
         }
         tvComment.setVisibility(isLoaded ? View.VISIBLE : View.GONE);
     }
 控制图片大小    
 drawable1.setBounds(0, 0, 30, 30);   控制图片大小   第一0是距左边距离,第二0是距上边距离,30分别是长宽> Android Y轴TextView旋转动画Animation- 
 让TextView里面的文字逐个显示的动画效果实现(1)- 
 imageCaptionTv.setText("Text Here");
 imageCaption.post(new Runnable() {
     @Override
     public void run() {
         int lineCount    = imageCaptionTv.getLineCount();
     }
 });> Android自定义TextView边框颜色(动态改变边框颜色以及字体颜色)- 
 TextView.setEnabled(false);//设置不可点击>  TextView上显示未读消息
<LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginTop="18.0dip"
         android:baselineAligned="false"
         android:orientation="horizontal" >        <RelativeLayout
             android:id="@+id/common_forth_process_layout"
             android:layout_width="0dip"
             android:layout_height="70.0dip"
             android:layout_weight="1.0" >            <LinearLayout
                 android:layout_width="60.0dip"
                 android:layout_height="60.0dip"
                 android:layout_centerHorizontal="true"
                 android:background="@drawable/common_apply_leave"
                 android:gravity="center"
                 android:orientation="horizontal" >                <TextView
                     android:id="@+id/common_forth_process"
                     style="@style/common_textSize_16"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:contentDescription="@null"
                     android:ems="2"
                     android:text="@string/common_apply_leave_text"
                     android:textColor="@color/white_color" />
             </LinearLayout>            <TextView
                 android:id="@+id/common_forth_process_num"
                 style="@style/common_textSize_14"
                 android:layout_width="22.0dip"
                 android:layout_height="22.0dip"
                 android:layout_alignParentRight="true"
                 android:layout_alignParentTop="true"
                 android:layout_marginRight="1.0dip"
                 android:background="@drawable/message_num_backgroud"
                 android:gravity="center"
                 android:textColor="@color/white_color"
                 android:visibility="gone" />
         </RelativeLayout>        <RelativeLayout
             android:id="@+id/common_fifth_process_layout"
             android:layout_width="0dip"
             android:layout_height="70.0dip"
             android:layout_weight="1.0"
             android:visibility="invisible" >            <TextView
                 android:id="@+id/common_fifth_process"
                 style="@style/common_textSize_16"
                 android:layout_width="60.0dip"
                 android:layout_height="60.0dip"
                 android:layout_centerHorizontal="true"
                 android:background="@drawable/common_doing_process"
                 android:gravity="center"
                 android:text="@string/matter_doing_label"
                 android:textColor="@color/white_color"
                 android:visibility="gone" />            <TextView
                 android:id="@+id/common_fifth_process_num"
                 style="@style/common_textSize_14"
                 android:layout_width="22.0dip"
                 android:layout_height="22.0dip"
                 android:layout_alignParentRight="true"
                 android:layout_alignParentTop="true"
                 android:layout_marginRight="12.0dip"
                 android:background="@drawable/message_num_backgroud"
                 android:gravity="center"
                 android:textColor="@color/white_color"
                 android:visibility="gone" />
         </RelativeLayout>        <RelativeLayout
             android:id="@+id/common_sixth_process_layout"
             android:layout_width="0dip"
             android:layout_height="70.0dip"
             android:layout_weight="1.0"
             android:visibility="invisible" >            <TextView
                 android:id="@+id/common_sixth_process"
                 style="@style/common_textSize_16"
                 android:layout_width="60.0dip"
                 android:layout_height="60.0dip"
                 android:layout_centerHorizontal="true"
                 android:background="@drawable/common_done_process"
                 android:gravity="center"
                 android:text="@string/matter_done_label"
                 android:textColor="@color/white_color"
                 android:visibility="gone" />            <TextView
                 android:id="@+id/common_sixth_process_num"
                 style="@style/common_textSize_14"
                 android:layout_width="22.0dip"
                 android:layout_height="22.0dip"
                 android:layout_alignParentRight="true"
                 android:layout_alignParentTop="true"
                 android:layout_marginRight="12.0dip"
                 android:background="@drawable/message_num_backgroud"
                 android:gravity="center"
                 android:textColor="@color/white_color"
                 android:visibility="gone" />
         </RelativeLayout>    </LinearLayout>
未读Msg+下面的title
  <LinearLayout
             android:id="@+id/common_first_process_layout"
             android:layout_width="0dip"
             android:layout_height="90.0dip"
             android:layout_weight="1.0"
             android:gravity="center"
             android:orientation="vertical" >
             <RelativeLayout
                 android:id="@+id/first_common"
                 android:layout_width="70dip"
                 android:layout_height="70.0dip" >                <TextView
                     android:id="@+id/common_first_process"
                     style="@style/common_textSize_16"
                     android:layout_width="60.0dip"
                     android:layout_height="60.0dip"
                     android:layout_centerHorizontal="true"
                     android:background="@drawable/common_todo_process"
                     android:contentDescription="@null"
                     android:gravity="center" />                <TextView
                     android:id="@+id/common_first_process_num"
                     style="@style/common_textSize_14"
                     android:layout_width="22.0dip"
                     android:layout_height="22.0dip"
                     android:layout_alignParentRight="true"
                     android:layout_alignParentTop="true"
                     android:layout_marginRight="1.0dip"
                     android:background="@drawable/message_num_backgroud"
                     android:gravity="center"
                     android:textColor="@color/white_color"
                     android:visibility="gone" />
             </RelativeLayout>            <TextView
                 android:id="@+id/first_text"
                 style="@style/common_textSize_color_13"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/matter_todo_label" />
 </LinearLayout>仿小红书自定义展开/收起的TextView- https://gitee.com/mrtrying/MrTryingUImaster/blob/master/wdiget_lib/src/main/java/com/mrtrying/widget/ExpandableTextView.java
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Build;
 import android.support.annotation.ColorInt;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.widget.AppCompatTextView;
 import android.text.Layout;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.StaticLayout;
 import android.text.TextUtils;
 import android.text.style.AlignmentSpan;
 import android.text.style.ForegroundColorSpan;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.animation.Animation;
 import android.view.animation.Transformation;/**
  * Description :
  * PackageName : com.mrtrying.widget
  * Created by mrtrying on 2019/4/17 17:21.
  * e_mail : ztanzeyu@gmail.com
  */
 public class ExpandableTextView extends AppCompatTextView {
     public static final String TAG = ExpandableTextView.class.getSimpleName();    private static final int DEFAULT_MAX_LINE = 3;
     private static final String DEFAULT_OPEN_SUFFIX = " 展开";
     private static final String DEFAULT_CLOSE_SUFFIX = " 收起";
     public static final String ELLIPSIS_STRING = new String(new char[]{'\u2026'});    private int mMaxLines = DEFAULT_MAX_LINE;
    /** TextView可展示宽度,包含paddingLeft和paddingRight */
     private int initWidth = 0;    /** 原始文本 */
     private CharSequence originalText;    private SpannableStringBuilder mOpenSpannableStr, mCloseSpannableStr;
    private boolean hasAnimation = false;
     private Animation mOpenAnim, mCloseAnim;
     private int mOpenHeight, mCLoseHeight;
     volatile boolean animating = false;
     boolean isClosed = false;
     private boolean mExpandable;
     private boolean mCloseInNewLine;
     @Nullable
     private SpannableString mOpenSuffixSpan, mCloseSuffixSpan;
     private String mOpenSuffixStr = DEFAULT_OPEN_SUFFIX;
     private String mCloseSuffixStr = DEFAULT_CLOSE_SUFFIX;
     private int mOpenSuffixColor, mCloseSuffixColor;    private OnClickListener mOnClickListener;
    private CharSequenceToSpannableHandler mCharSequenceToSpannableHandler;
    public ExpandableTextView(Context context) {
         super(context);
         initialize();
     }    public ExpandableTextView(Context context, AttributeSet attrs) {
         super(context, attrs);
         initialize();
     }    public ExpandableTextView(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
         initialize();
     }    /** 初始化 */
     private void initialize() {
         mOpenSuffixColor = mCloseSuffixColor = Color.parseColor("#F23030");
         updateOpenSuffixSpan();
         updateCloseSuffixSpan();
     }    public void setOriginalText(CharSequence originalText) {
         this.originalText = originalText;        final int maxLines = mMaxLines;
         SpannableStringBuilder tempText = charSequenceToSpannable(originalText);
         mOpenSpannableStr = charSequenceToSpannable(originalText);        if (maxLines != -1) {
             Layout layout = createStaticLayout(tempText);
             mExpandable = layout.getLineCount() > maxLines;
             if (mExpandable) {
                 //拼接展开内容
                 if (mCloseInNewLine) {
                     mOpenSpannableStr.append("\n");
                 }
                 if (mCloseSuffixSpan != null) {
                     mOpenSpannableStr.append(mCloseSuffixSpan);
                 }
                 //计算原文截取位置
                 int endPos = layout.getLineEnd(maxLines - 1);
                 mCloseSpannableStr = charSequenceToSpannable(originalText.subSequence(0, endPos));
                 SpannableStringBuilder tempText2 = charSequenceToSpannable(mCloseSpannableStr).append(ELLIPSIS_STRING);
                 if (mOpenSuffixSpan != null) {
                     tempText2.append(tempText2);
                 }
                 //循环判断,收起内容添加展开后缀后的内容
                 Layout tempLayout = createStaticLayout(tempText2);
                 while (tempLayout.getLineCount() > maxLines) {
                     int lastSpace = mCloseSpannableStr.length() - 1;
                     if (lastSpace == -1) {
                         break;
                     }
                     mCloseSpannableStr = charSequenceToSpannable(originalText.subSequence(0, lastSpace));
                     tempText2 = charSequenceToSpannable(mCloseSpannableStr).append(ELLIPSIS_STRING);
                     if (mOpenSuffixSpan != null) {
                         tempText2.append(mOpenSuffixSpan);
                     }
                     tempLayout = createStaticLayout(tempText2);
                 }
                 //计算收起的文本高度
                 mCLoseHeight = tempLayout.getHeight() + getPaddingTop() + getPaddingBottom();                mCloseSpannableStr.append(ELLIPSIS_STRING);
                 if (mOpenSuffixSpan != null) {
                     mCloseSpannableStr.append(mOpenSuffixSpan);
                 }
             }
         }
         isClosed = mExpandable;
         if (mExpandable) {
             setText(mCloseSpannableStr);
             //设置监听
             super.setOnClickListener(new OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     isClosed = !isClosed;
                     if (isClosed) {
                         close();
                     } else {
                         open();
                     }                    if (mOnClickListener != null) {
                         mOnClickListener.onClick(v);
                     }
                 }
             });
         } else {
             setText(mOpenSpannableStr);
         }
     }    /**
      * 设置是否有动画
      *
      * @param hasAnimation
      */
     public void setHasAnimation(boolean hasAnimation) {
         this.hasAnimation = hasAnimation;
     }    /** 展开 */
     private void open() {
         if (hasAnimation) {
             Layout layout = createStaticLayout(mOpenSpannableStr);
             mOpenHeight = layout.getHeight() + getPaddingTop() + getPaddingBottom();
             executeOpenAnim();
         } else {
             ExpandableTextView.super.setMaxLines(Integer.MAX_VALUE);
             setText(mOpenSpannableStr);
         }
     }    /** 收起 */
     private void close() {
         if (hasAnimation) {
             executeCloseAnim();
         } else {
             ExpandableTextView.super.setMaxLines(mMaxLines);
             setText(mCloseSpannableStr);
         }
     }    /** 执行展开动画 */
     private void executeOpenAnim() {
         //创建展开动画
         if (mOpenAnim == null) {
             mOpenAnim = new ExpandCollapseAnimation(this, mCLoseHeight, mOpenHeight);
             mOpenAnim.setFillAfter(true);
             mOpenAnim.setAnimationListener(new Animation.AnimationListener() {
                 @Override
                 public void onAnimationStart(Animation animation) {
                     ExpandableTextView.super.setMaxLines(Integer.MAX_VALUE);
                     setText(mOpenSpannableStr);
                 }                @Override
                 public void onAnimationEnd(Animation animation) {
                     //  动画结束后textview设置展开的状态
                     getLayoutParams().height = mOpenHeight;
                     requestLayout();
                     animating = false;
                 }                @Override
                 public void onAnimationRepeat(Animation animation) {                }
             });
         }        if (animating) {
             return;
         }
         animating = true;
         clearAnimation();
         //  执行动画
         startAnimation(mOpenAnim);
     }    /** 执行收起动画 */
     private void executeCloseAnim() {
         //创建收起动画
         if (mCloseAnim == null) {
             mCloseAnim = new ExpandCollapseAnimation(this, mOpenHeight, mCLoseHeight);
             mCloseAnim.setFillAfter(true);
             mCloseAnim.setAnimationListener(new Animation.AnimationListener() {
                 @Override
                 public void onAnimationStart(Animation animation) {                }
                @Override
                 public void onAnimationEnd(Animation animation) {
                     animating = false;
                     ExpandableTextView.super.setMaxLines(mMaxLines);
                     setText(mCloseSpannableStr);
                     getLayoutParams().height = mCLoseHeight;
                     requestLayout();
                 }                @Override
                 public void onAnimationRepeat(Animation animation) {                }
             });
         }        if (animating) {
             return;
         }
         animating = true;
         clearAnimation();
         //  执行动画
         startAnimation(mCloseAnim);
     }    /**
      * @param spannable
      *
      * @return
      */
     private Layout createStaticLayout(SpannableStringBuilder spannable) {
         int contentWidth = initWidth - getPaddingLeft() - getPaddingRight();
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
             return new StaticLayout(spannable, getPaint(), contentWidth, Layout.Alignment.ALIGN_NORMAL,
                     getLineSpacingMultiplier(), getLineSpacingExtra(), false);
         }else{
             return new StaticLayout(spannable, getPaint(), contentWidth, Layout.Alignment.ALIGN_NORMAL,
                     1f, 0.0f, false);
         }
     }    /**
      * @param charSequence
      *
      * @return
      */
     private SpannableStringBuilder charSequenceToSpannable(@NonNull CharSequence charSequence) {
         SpannableStringBuilder spannableStringBuilder = null;
         if (mCharSequenceToSpannableHandler != null) {
             spannableStringBuilder = mCharSequenceToSpannableHandler.charSequenceToSpannable(charSequence);
         }
         if (spannableStringBuilder == null) {
             spannableStringBuilder = new SpannableStringBuilder(charSequence);
         }
         return spannableStringBuilder;
     }    /**
      * 初始化TextView的可展示宽度
      *
      * @param width
      */
     public void initWidth(int width) {
         initWidth = width;
     }    @Override
     public void setMaxLines(int maxLines) {
         this.mMaxLines = maxLines;
         super.setMaxLines(maxLines);
     }    /**
      * 设置展开后缀text
      *
      * @param openSuffix
      */
     public void setOpenSuffix(String openSuffix) {
         mOpenSuffixStr = openSuffix;
         updateOpenSuffixSpan();
     }    /**
      * 设置展开后缀文本颜色
      *
      * @param openSuffixColor
      */
     public void setOpenSuffixColor(@ColorInt int openSuffixColor) {
         mOpenSuffixColor = openSuffixColor;
         updateOpenSuffixSpan();
     }    /**
      * 设置收起后缀text
      *
      * @param closeSuffix
      */
     public void setCloseSuffix(String closeSuffix) {
         mCloseSuffixStr = closeSuffix;
         updateCloseSuffixSpan();
     }    /**
      * 设置收起后缀文本颜色
      *
      * @param closeSuffixColor
      */
     public void setCloseSuffixColor(@ColorInt int closeSuffixColor) {
         mCloseSuffixColor = closeSuffixColor;
         updateCloseSuffixSpan();
     }    /**
      * 收起后缀是否另起一行
      *
      * @param closeInNewLine
      */
     public void setCloseInNewLine(boolean closeInNewLine) {
         mCloseInNewLine = closeInNewLine;
         updateCloseSuffixSpan();
     }    /** 更新展开后缀Spannable */
     private void updateOpenSuffixSpan() {
         if (TextUtils.isEmpty(mOpenSuffixStr)) {
             mOpenSuffixSpan = null;
             return;
         }
         mOpenSuffixSpan = new SpannableString(mOpenSuffixStr);
         mOpenSuffixSpan.setSpan(new ForegroundColorSpan(mOpenSuffixColor), 0, mOpenSuffixStr.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
     }    /** 更新收起后缀Spannable */
     private void updateCloseSuffixSpan() {
         if (TextUtils.isEmpty(mCloseSuffixStr)) {
             mCloseSuffixSpan = null;
             return;
         }
         mCloseSuffixSpan = new SpannableString(mCloseSuffixStr);
         mCloseSuffixSpan.setSpan(new ForegroundColorSpan(mCloseSuffixColor), 0, mCloseSuffixStr.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
         if (mCloseInNewLine) {
             AlignmentSpan alignmentSpan = new AlignmentSpan.Standard(Layout.Alignment.ALIGN_OPPOSITE);
             mCloseSuffixSpan.setSpan(alignmentSpan, 0, mCloseSuffixStr.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
         }
     }    @Override
     public void setOnClickListener(OnClickListener onClickListener) {
         mOnClickListener = onClickListener;
     }    /**
      * 设置文本内容处理
      *
      * @param charSequenceToSpannableHandler
      */
     public void setCharSequenceToSpannableHandler(CharSequenceToSpannableHandler charSequenceToSpannableHandler) {
         mCharSequenceToSpannableHandler = charSequenceToSpannableHandler;
     }    public interface CharSequenceToSpannableHandler {
         @NonNull
         SpannableStringBuilder charSequenceToSpannable(CharSequence charSequence);
     }    class ExpandCollapseAnimation extends Animation {
         private final View mTargetView;//动画执行view
         private final int mStartHeight;//动画执行的开始高度
         private final int mEndHeight;//动画结束后的高度        ExpandCollapseAnimation(View target, int startHeight, int endHeight) {
             mTargetView = target;
             mStartHeight = startHeight;
             mEndHeight = endHeight;
             setDuration(400);
         }        @Override
         protected void applyTransformation(float interpolatedTime, Transformation t) {
             //计算出每次应该显示的高度,改变执行view的高度,实现动画
             mTargetView.getLayoutParams().height = (int) ((mEndHeight - mStartHeight) * interpolatedTime + mStartHeight);
             mTargetView.requestLayout();
         }
     }
 }