上次写了一个音乐播放器 今天吧里面的一个效果写出来 写博客的习惯要慢慢养成 虽然平时上班忙 但是这不是借口
好了 正题开始
上面的效果 也不知道 能看到不 看不到 明天 再重新上传gif吧 家里电脑没有模拟器 做gif麻烦 回公司 在传
上面也有一些说明
圆形图片的显示 是网上的一个开源控件CircleImageView
在已有的轮子上面 稍加修改
形成上面的效果
主要是两点
进度条的绘制 来自歌曲的进度 按百分比来计算 当前播放的进度/歌曲总进度*360(一个圆)
主要是 进度条的绘制位置的确定
也就是弧形的绘制
弧形绘制 是这个RectF // 画圆弧的 画图分析 一半的一半才行
在这个CircleImageView 控件中 看懂核心就行
里面有这么一段
mBorderPaint.setStyle(Paint.Style.STROKE); //绘制最外面的圆弧
mBorderPaint.setAntiAlias(true);
mBorderPaint.setColor(mBorderColor);
mBorderPaint.setStrokeWidth(mBorderWidth);
mBitmapHeight = mBitmap.getHeight(); //显示图片的高
mBitmapWidth = mBitmap.getWidth(); //显示图片的宽
mBorderRect.set(0, 0, getWidth(), getHeight()); //一个矩形
mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, //绘制的圆的半径的确定
(mBorderRect.width() - mBorderWidth) / 2);
mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width()
- mBorderWidth, mBorderRect.height() - mBorderWidth);
mDrawableRadius = Math.min(mDrawableRect.height() / 2,
mDrawableRect.width() / 2);RectF.set(mBorderWidth/2, mBorderWidth/2, getWidth()-mBorderWidth/2,
getHeight()-mBorderWidth/2);四个参数 确定这个矩形的 四个点
具体解释如下
修改的CircleImageView 文件
package com.daemon.musicseekbar;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
public class CircleImageView extends ImageView {
private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;
private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
private static final int COLORDRAWABLE_DIMENSION = 1;
private static final int DEFAULT_BORDER_WIDTH = 0;
private static final int DEFAULT_BORDER_COLOR = Color.BLACK;
private final RectF mDrawableRect = new RectF();
private final RectF mBorderRect = new RectF();
private final Matrix mShaderMatrix = new Matrix();
private final Paint mBitmapPaint = new Paint();
private final Paint mBorderPaint = new Paint();
private int mBorderColor = DEFAULT_BORDER_COLOR;
private int mBorderWidth = DEFAULT_BORDER_WIDTH;
private Bitmap mBitmap;
private BitmapShader mBitmapShader;
private int mBitmapWidth;
private int mBitmapHeight;
private float mDrawableRadius;
private float mBorderRadius;
private boolean mReady;
private boolean mSetupPending;
private Paint mBorderPaint1 = new Paint();;
public float newAngle; // 画弧线的角度
private RectF mBorderRect1 = new RectF();
private MyApplication app;
public CircleImageView(Context context) {
super(context);
}
public CircleImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
super.setScaleType(SCALE_TYPE);
app = (MyApplication) ((MainActivity)(context)).getApplication();
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.CircleImageView, defStyle, 0);
mBorderWidth = a.getDimensionPixelSize(
R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);
mBorderColor = a.getColor(R.styleable.CircleImageView_border_color,
DEFAULT_BORDER_COLOR);
a.recycle();
mReady = true;
if (mSetupPending) {
setup();
mSetupPending = false;
}
}
@Override
public ScaleType getScaleType() {
return SCALE_TYPE;
}
@Override
public void setScaleType(ScaleType scaleType) {
if (scaleType != SCALE_TYPE) {
throw new IllegalArgumentException(String.format(
"ScaleType %s not supported.", scaleType));
}
}
@Override
protected void onDraw(Canvas canvas) {
if (getDrawable() == null) {
return;
}
canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius,
mBitmapPaint); // 里面的图片
canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius,
mBorderPaint); // 边缘的线
// 刷新 然后 在边缘 动态 画弧线
if (mBorderWidth > 0) {
canvas.drawArc(mBorderRect1, -90, app.newAngle, false, mBorderPaint1);
}
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
setup();
}
public int getBorderColor() {
return mBorderColor;
}
public void setBorderColor(int borderColor) {
if (borderColor == mBorderColor) {
return;
}
mBorderColor = borderColor;
mBorderPaint.setColor(mBorderColor);
invalidate();
}
public int getBorderWidth() {
return mBorderWidth;
}
public void setBorderWidth(int borderWidth) {
if (borderWidth == mBorderWidth) {
return;
}
mBorderWidth = borderWidth;
setup();
}
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
mBitmap = bm;
setup();
}
@Override
public void setImageDrawable(Drawable drawable) {
super.setImageDrawable(drawable);
mBitmap = getBitmapFromDrawable(drawable);
setup();
}
@Override
public void setImageResource(int resId) {
super.setImageResource(resId);
mBitmap = getBitmapFromDrawable(getDrawable());
setup();
}
private Bitmap getBitmapFromDrawable(Drawable drawable) {
if (drawable == null) {
return null;
}
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
}
try {
Bitmap bitmap;
if (drawable instanceof ColorDrawable) {
bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION,
COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
} else {
// 为0就自己加上需要的 要改不 就 传值 变化 或者 这里可以先测量一下？
if (drawable.getIntrinsicWidth() <= 0) {
int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
measure(w, h);
int height =getMeasuredHeight();
int width =getMeasuredWidth();
System.out.println(height +"---"+ width);
bitmap = Bitmap
.createBitmap(width,height,BITMAP_CONFIG);
}
else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(), BITMAP_CONFIG);
}
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
} catch (OutOfMemoryError e) {
return null;
}
}
private void setup() {
if (!mReady) {
mSetupPending = true;
return;
}
if (mBitmap == null) {
return;
}
mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP,
Shader.TileMode.CLAMP);
mBitmapPaint.setAntiAlias(true);
mBitmapPaint.setShader(mBitmapShader);
mBorderPaint.setStyle(Paint.Style.STROKE);
mBorderPaint.setAntiAlias(true);
mBorderPaint.setColor(mBorderColor);
mBorderPaint.setStrokeWidth(mBorderWidth);
// 画弧线的
mBorderPaint1.setStyle(Paint.Style.STROKE);
mBorderPaint1.setAntiAlias(true);
mBorderPaint1.setColor(Color.parseColor("#F08080"));
mBorderPaint1.setStrokeWidth(mBorderWidth);
mBitmapHeight = mBitmap.getHeight();
mBitmapWidth = mBitmap.getWidth();
mBorderRect.set(0, 0, getWidth(), getHeight());
mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2,
(mBorderRect.width() - mBorderWidth) / 2);
mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width()
- mBorderWidth, mBorderRect.height() - mBorderWidth);
mDrawableRadius = Math.min(mDrawableRect.height() / 2,
mDrawableRect.width() / 2);
// 画圆弧的 画图分析 一半的一半才行
mBorderRect1.set(mBorderWidth/2, mBorderWidth/2, getWidth()-mBorderWidth/2,
getHeight()-mBorderWidth/2);
updateShaderMatrix();
invalidate();
}
private void updateShaderMatrix() {
float scale;
float dx = 0;
float dy = 0;
mShaderMatrix.set(null);
if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width()
* mBitmapHeight) {
scale = mDrawableRect.height() / (float) mBitmapHeight;
dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
} else {
scale = mDrawableRect.width() / (float) mBitmapWidth;
dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
}
mShaderMatrix.setScale(scale, scale);
mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth,
(int) (dy + 0.5f) + mBorderWidth);
mBitmapShader.setLocalMatrix(mShaderMatrix);
}
}
ＸＭＬ布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.daemon.musicseekbar.MainActivity" xmlns:app="http://schemas.android.com/apk/res/com.daemon.musicseekbar">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="
取出本地歌曲的前10首 随机播放一首 \n
歌曲封面图片为 显示图片 \n
圆形进度条随着歌曲播放而改变 \n
CircleImageView 这个控件是github上面的 \n
其实自定义一个也可以 但是这里有现成的轮子 就用了\n
但是也 稍加修改了 因为外面的圆心进度滚动 也要计算
"
/>
<com.daemon.musicseekbar.CircleImageView
android:layout_centerInParent="true"
android:id="@+id/civ_show"
android:layout_width="200dp"
android:layout_height="200dp"
app:border_width="5dp"
app:border_color="#ffffff"
android:src="@drawable/ic_launcher"
/>
<LinearLayout
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/tv_music_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="歌曲名"
/>
<Button
android:id="@+id/bt_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放"
/>
<Button
android:id="@+id/bt_change"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="换一首"
/>
</LinearLayout>
</RelativeLayout>
MainActivity 显示图片还是用了Imageloader 因为要显示 歌曲的专辑图片 眨眼方便很多 大晚上的也要睡觉了
package com.daemon.musicseekbar;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import android.support.v7.app.ActionBarActivity;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
protected static final int UPDATE_MUISC_COUNT = 0;
private CircleImageView civ_show;
private Cursor c;
String path;
private com.daemon.musicseekbar.MusicData musicDate;
Handler handler = new Handler() {
private int play_time;
public void handleMessage(Message msg) {
switch (msg.what) {
case UPDATE_MUISC_COUNT:
// 随机 选取一首
int random = new Random().nextInt(musicDate._paths.size());
path = musicDate._paths.get(random);
tv_music_name.setText(musicDate._titles.get(random));
String uri = "content://media/external/audio/albumart/"
+ musicDate._album_ids.get(random);
imageLoader.displayImage(uri, civ_show, options,
new ImageLoaderSetting.AnimateFirstDisplayListener());
break;
case 1:
// 用一个计时器 来 遍历 存在 app 中的数字
play_time = mp.getCurrentPosition();
app.newAngle = ((float) mp.getCurrentPosition()
/ (float) mp.getDuration() * 360);
// System.out.println("播放 进度 移动 角度" + app.newAngle);
civ_show.invalidate();
break;
default:
break;
}
};
};
Runnable runable = new Runnable() {
@Override
public void run() {
while (true) {
SystemClock.sleep(1000);
if (mp != null && mp.isPlaying()) {
Message msg = Message.obtain();
msg.what = 1;
handler.sendMessage(msg);
}
}
// handler.postDelayed(this, 1000); // 1s更新一次
}
};
private TextView tv_music_name;
private Button bt_play;
private ImageLoader imageLoader;
private DisplayImageOptions options;
private Button bt_change;
private MediaPlayer mp;
private MyApplication app;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
app = (MyApplication) getApplication();
imageLoader = ImageLoader.getInstance();
configOptions();
civ_show = (CircleImageView) findViewById(R.id.civ_show);
tv_music_name = (TextView) findViewById(R.id.tv_music_name);
bt_play = (Button) findViewById(R.id.bt_play);
bt_change = (Button) findViewById(R.id.bt_change);
mp = new MediaPlayer();
bt_change.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 随机 选取一首
int random = new Random().nextInt(musicDate._paths.size());
path = musicDate._paths.get(random);
tv_music_name.setText(musicDate._titles.get(random));
String uri = "content://media/external/audio/albumart/"
+ musicDate._album_ids.get(random);
imageLoader.displayImage(uri, civ_show, options,
new ImageLoaderSetting.AnimateFirstDisplayListener());
mp.reset();
try {
mp.setDataSource(path);
mp.prepare();
mp.start();
mp.seekTo(30 * 1000);
} catch (IllegalArgumentException | SecurityException
| IllegalStateException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
bt_play.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, path, 0).show();
try {
if (mp.isPlaying()) {
mp.pause();
} else {
mp.reset();
mp.setDataSource(path);
mp.prepare();
mp.start();
mp.seekTo(30 * 1000);
}
} catch (IllegalArgumentException | SecurityException
| IllegalStateException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
// 随便播放本地一首音乐
getLocalMusic();
new Thread(runable).start();
}
private void configOptions() {
options = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.ic_launcher)
.showImageForEmptyUri(R.drawable.ic_launcher)
.imageScaleType(ImageScaleType.IN_SAMPLE_INT)
// 图片缩放方式
.showImageOnFail(R.drawable.ic_launcher).cacheInMemory(true)
.cacheOnDisc(true).bitmapConfig(Bitmap.Config.RGB_565)
// .displayer(new RoundedBitmapDisplayer(90))
.build();
}
private void getLocalMusic() {
c = getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Video.Media.TITLE, // 音乐名
MediaStore.Audio.Media.DURATION, // 音乐的总时间
MediaStore.Audio.Media.ARTIST, // 艺术家
MediaStore.Audio.Media._ID, // id号
MediaStore.Audio.Media.DISPLAY_NAME, // 音乐文件名
MediaStore.Audio.Media.DATA, // 音乐文件的路径
MediaStore.Audio.Media.ALBUM_ID // 封面要用的
}, null,// 查询条件，相当于sql中的where语句
null, // 查询条件中使用到的数据
null);// 查询结果的排序方式
musicDate = new MusicData();
musicDate._ids = new ArrayList<Integer>();
musicDate._titles = new ArrayList<String>();
musicDate._paths = new ArrayList<String>();
musicDate._singers = new ArrayList<String>();
musicDate._album_ids = new ArrayList<Integer>();
musicDate._durations = new ArrayList<Long>();
// 异步加载
new Thread(new Runnable() {
@Override
public void run() {
c.moveToFirst(); // 第一个
for (int i = 0; i <= 10; i++) {
// 大于30s才可以进来
System.out.println("歌曲时间 " + c.getLong(1));
if (c.getLong(1) > 30000) {
musicDate._durations.add(c.getLong(1));
musicDate._ids.add(c.getInt(3));
musicDate._titles.add(c.getString(0));
musicDate._paths.add(c.getString(5)); //
musicDate._singers.add(c.getString(2));
musicDate._album_ids.add(c.getInt(6));
// 扫描一首 进度条 更新 上面的本地歌曲 更新 下面的 扫描地址音乐更
}
c.moveToNext();
}
// 通知 之前 将数据 保留下
Message msg = Message.obtain();
msg.what = UPDATE_MUISC_COUNT;
handler.sendMessage(msg);
}
}).start();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MyApplication
package com.daemon.musicseekbar;
import java.io.File;
import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;
import com.nostra13.universalimageloader.utils.StorageUtils;
import android.app.Application;
public class MyApplication extends Application {
public float newAngle=0; //开始角度
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
//设置缓存 路径
File cacheDir = StorageUtils.getOwnCacheDirectory(getApplicationContext(), "imageloader_Dting/Cache");
/**
* imageload 基本配置 初始化ImageLoader
*/
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
.memoryCacheExtraOptions(100, 100)
.threadPoolSize(3)
.threadPriority(Thread.NORM_PRIORITY - 2)
.denyCacheImageMultipleSizesInMemory()
.discCacheFileNameGenerator(new Md5FileNameGenerator())
.tasksProcessingOrder(QueueProcessingType.LIFO)
.discCache(new UnlimitedDiscCache(cacheDir)) //设置缓存路径
.writeDebugLogs()
//.enableLogging() // Not necessary in common
.build();
ImageLoader.getInstance().init(config);
}
}
Imageloader用法 应该都会吧 相关的就不说了
MusicData 根据代码 可以自己创建实体 封装就是
基本差不多就这样了 明天看图传成功了没
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