项目的结构如下图：
DBHlper是创建数据库的java文件,RegisterActivity是用户注册的逻辑代码，MainActivity是用户登入代码，MemoInfo是bean文件，Memo是登入成功后的逻辑代码，SaveMemo是用户记录的逻辑代码，showmemo是用户修改记事本该条内容的逻辑代码。下面开始看源码吧！！！
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数据库的创建：创建了tb_user、tb_memo两个数据库，它们之间通过userid关联。这样每个用户之间记录的东西就不会弄混了。（A记录的东西不会出现在B用户的页面上）
登入：
package com.example.jsjx.memo;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private EditText edt_username;
private EditText edt_password;
private Button btn_login;
private Button btn_register;
String name;
String password;
String id;
private DBHelper dbHelper;
SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.index);
init();
dbHelper=new DBHelper(this);
btn_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(MainActivity.this,RegisterActivity.class);
startActivity(intent);
}
});
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
db=dbHelper.getReadableDatabase();
name = edt_username.getText().toString();
password = edt_password.getText().toString();
if(enter(name,password)){
Toast.makeText(MainActivity.this, "登入成功", Toast.LENGTH_SHORT).show();
String sql="select user_id from tb_user where username=? and password=?";
Cursor cursor = db.rawQuery(sql, new String[] {name, password});
while(cursor.moveToNext()){
id=Integer.toString(cursor.getInt(0));
System.out.println(id);
}
cursor.close();
// SharedPreferences.Editor editor=sp.edit();
// editor.putString("name",name);
// editor.putString("password",password);
// editor.commit();
new Thread(){
public void run(){
super.run();
try {
Thread.sleep(3000);
Intent intent1=new Intent(MainActivity.this,Memo.class);
intent1.putExtra("name",name);
intent1.putExtra("id",id);
startActivity(intent1);
}catch (InterruptedException e) {
e.printStackTrace();
}
}
}.start();
}
else if((TextUtils.isEmpty(name)||TextUtils.isEmpty(password))||(TextUtils.isEmpty(name)&&TextUtils.isEmpty(password))){
Toast.makeText(MainActivity.this, "请输入用户名或密码", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(MainActivity.this, "登入失败", Toast.LENGTH_SHORT).show();
}
db.close();
}
});
}
public void init(){
edt_username=(EditText)findViewById(R.id.edt_username);
edt_password=(EditText)findViewById(R.id.edt_password);
btn_login=(Button)findViewById(R.id.btn_login);
btn_register=(Button)findViewById(R.id.btn_go_register);
}
public boolean enter(String name,String password) {
SQLiteDatabase db = dbHelper.getWritableDatabase();
String sql = "select user_id from tb_user where username=? and password=?";
Cursor cursor = db.rawQuery(sql, new String[] {name, password});
if (cursor.getCount()!=0) {
cursor.close();
return true;
}
return false;
}
}注册：
package com.example.jsjx.memo;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class RegisterActivity extends AppCompatActivity{
private EditText edt_setname;
private EditText edt_setpassword;
private EditText edt_confirm_password;
private Button btn_register;
String name;
String id;
String password;
private DBHelper dbHelper;
ContentValues contentValues=new ContentValues();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
init();
dbHelper=new DBHelper(this);
btn_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SQLiteDatabase db;
db=dbHelper.getWritableDatabase();
name=edt_setname.getText().toString();
password=edt_setpassword.getText().toString();
if (edt_setname.getText().toString().contains(" ") || edt_setpassword.getText().toString().contains(" ")) {
System.out.println(name+"\n"+password);
Toast.makeText(RegisterActivity.this, "输入的用户名或密码不能包含空格", Toast.LENGTH_SHORT).show();
return;
}
else if(edt_setpassword.getText().toString().length()==0||edt_setname.getText().toString().length()==0){
Toast.makeText(RegisterActivity.this, "请输入用户名或密码", Toast.LENGTH_SHORT).show();
return;
}
else if(!edt_confirm_password.getText().toString().equals(edt_setpassword.getText().toString())){
Toast.makeText(RegisterActivity.this, "两次密码不一致，请确认再注册", Toast.LENGTH_SHORT).show();
return;
}
name = edt_setname.getText().toString();
password = edt_setpassword.getText().toString();
if(login(name)){
System.out.println(name+"\n"+password);
Toast.makeText(RegisterActivity.this, "该用户名已注册", Toast.LENGTH_SHORT).show();
return;
}
contentValues.put("username", name);
contentValues.put("password", password);
db.insert("tb_user", null, contentValues);
String sql="select user_id from tb_user where username=? and password=?";
Cursor cursor = db.rawQuery(sql, new String[] {name, password});
while(cursor.moveToNext()){
id=Integer.toString(cursor.getInt(0));
System.out.println(id);
}
cursor.close();
db.close();
Toast.makeText(RegisterActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
new Thread(){
@Override
public void run() {
super.run();
try {
Thread.sleep(2000);
Intent intent = new Intent(RegisterActivity.this,Memo.class);
intent.putExtra("name",name);
intent.putExtra("id",id);
startActivity(intent);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}.start();
}
});
}
public void init(){
edt_setname=(EditText)findViewById(R.id.edt_setusername);
edt_setpassword=(EditText)findViewById(R.id.edt_setpassword);
edt_confirm_password=(EditText)findViewById(R.id.edt_confirm_password);
btn_register=(Button)findViewById(R.id.btn_register);
}
public boolean login(String name) {
SQLiteDatabase db = dbHelper.getWritableDatabase();
String sql = "select * from tb_user where username=?";
Cursor cursor = db.rawQuery(sql, new String[] {name});
if (cursor.getCount()!=0) {
cursor.close();
return true;
}
return false;
}
}listview显示用户记录的信息：
package com.example.jsjx.memo;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class Memo extends AppCompatActivity {
private TextView welcome;
private ImageButton btn_add;
private ListView listView;
private DBHelper dbHelper;
private ArrayList<Memo_info> MemoList;
SQLiteDatabase db;
private int id;
private String name;
private String strid;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_add=(ImageButton)findViewById(R.id.btn_add);
listView=(ListView)findViewById(R.id.lv_memoList);
dbHelper=new DBHelper(this);
db=dbHelper.getReadableDatabase();
welcome=(TextView)findViewById(R.id.welcome_word);
final Intent intent=getIntent();
MemoList=new ArrayList<>();
id=Integer.parseInt(intent.getStringExtra("id"));
String sql_name="select username from tb_user where user_id=?";
Cursor c=db.rawQuery(sql_name,new String[]{Integer.toString(id)});
while(c.moveToNext()){
name=c.getString(c.getColumnIndex("username"));
}
strid=Integer.toString(id);
welcome.setText(name+"欢迎你！");
String sql="select * from tb_memo where userID=?";
Cursor cursor = db.rawQuery(sql,new String[]{Integer.toString(id)});
while(cursor.moveToNext()){
if(id==cursor.getInt(2)){
String title=cursor.getString(cursor.getColumnIndex("title"));
String createDate=cursor.getString(cursor.getColumnIndex("createDate"));
int id=cursor.getInt(0);
Memo_info memo=new Memo_info(title,createDate,id);
System.out.println("title:"+title+"createDate:"+createDate+"id:"+id);
MemoList.add(memo);
}
}
listView.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return MemoList.size();
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View convertView, ViewGroup viewGroup) {
View view;
if (convertView==null){
view = View.inflate(getBaseContext(),R.layout.list_item_memo,null);
}else{
view = convertView;
}
Memo_info memo=MemoList.get(i);
TextView title=(TextView)view.findViewById(R.id.title);
TextView content=(TextView)view.findViewById(R.id.content);
TextView getsqlId=(TextView)view.findViewById(R.id.getsqlId);
TextView createDate=(TextView)view.findViewById(R.id.noticeDate);
title.setText(memo.getTitle());
content.setText(memo.getContent());
createDate.setText(memo.getCreateDate());
getsqlId.setText(Integer.toString(memo.getId()));
return view;
}
});
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent1=new Intent(Memo.this,SaveMemo.class);
intent1.putExtra("userID",strid);
startActivity(intent1);
}
});
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
TextView view1=(TextView)view.findViewById(R.id.getsqlId);
String memoid=view1.getText().toString();
Intent intent2=new Intent(Memo.this,showmemo.class);
intent2.putExtra("memoid",memoid);
intent2.putExtra("user_id",strid);
startActivity(intent2);
}
});
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
Button btn_del=(Button)view.findViewById(R.id.btn_del);
btn_del.setVisibility(View.VISIBLE);
TextView view1=(TextView)view.findViewById(R.id.getsqlId);
final String memoid=view1.getText().toString();
btn_del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
db=dbHelper.getWritableDatabase();
db.delete("tb_memo","id=?",new String[]{memoid});
Intent intent3=new Intent(Memo.this,Memo.class);
System.out.println("调用删除方法");
intent3.putExtra("id",strid);
startActivity(intent3);
}
});
return true;
}
});
}
}增加信息代码：
package com.example.jsjx.memo;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.EditText;
import java.text.SimpleDateFormat;
import java.util.Date;
public class SaveMemo extends AppCompatActivity {
private DBHelper dbHelper;
private EditText et1;
private String data;
private String title;
private String createDate;
SQLiteDatabase db;
private int id;
ContentValues contentValues=new ContentValues();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edt_memo);
et1=(EditText) findViewById(R.id.edt1);
dbHelper=new DBHelper(this);
Intent intent=getIntent();
id=Integer.parseInt(intent.getStringExtra("userID"));
SimpleDateFormat formatter = new SimpleDateFormat ("yyyy年MM月dd日 HH:mm:ss");
Date curDate = new Date(System.currentTimeMillis());
createDate=formatter.format(curDate);
}
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if (keyCode == KeyEvent.KEYCODE_BACK )
{
// 创建退出对话框
AlertDialog isExit = new AlertDialog.Builder(this).create();
// 设置对话框标题
isExit.setTitle("系统提示");
// 设置对话框消息
isExit.setMessage("确定要退出保存吗");
// 添加选择按钮并注册监听
isExit.setButton("确定", listener);
isExit.setButton2("取消", listener);
// 显示对话框
isExit.show();
}
return false;
}
DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
switch (which)
{
case AlertDialog.BUTTON_POSITIVE:// "确认"按钮退出程序
data=et1.getText().toString();
System.out.println("初始data:"+data);
if(data.length()==0){
System.out.println("无数据data:"+data);
System.out.println("时间:"+createDate);
Intent intent=new Intent(SaveMemo.this,Memo.class);
intent.putExtra("id",Integer.toString(id));
startActivity(intent);
}else if(data.length()>=10){
System.out.println("有数据data:"+data);
System.out.println("data:"+data);
title=data.substring(0,10);
db=dbHelper.getWritableDatabase();
contentValues.put("userID",id);
contentValues.put("title", title);
contentValues.put("createDate",createDate);
contentValues.put("content",data);
db.insert("tb_memo",null,contentValues);
Intent intent=new Intent(SaveMemo.this,Memo.class);
intent.putExtra("id",Integer.toString(id));
startActivity(intent);
}else{
System.out.println("有数据data:"+data);
System.out.println("data:"+data);
title=data;
db=dbHelper.getWritableDatabase();
contentValues.put("userID",id);
contentValues.put("title", title);
contentValues.put("createDate",createDate);
contentValues.put("content",data);
db.insert("tb_memo",null,contentValues);
Intent intent=new Intent(SaveMemo.this,Memo.class);
intent.putExtra("id",Integer.toString(id));
startActivity(intent);
}
break;
case AlertDialog.BUTTON_NEGATIVE:// "取消"第二个按钮取消对话框
break;
default:
break;
}
}
};
}修改用户记录的信息：
package com.example.jsjx.memo;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.EditText;
import java.text.SimpleDateFormat;
import java.util.Date;
public class showmemo extends AppCompatActivity {
private EditText et2;
private String id;
private String userid;
private DBHelper dbHelper;
private String memo_info;
private String data;
private String title;
private String createDate;
SQLiteDatabase db;
ContentValues contentValues=new ContentValues();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.showmemo);
et2=(EditText) findViewById(R.id.edt2);
Intent intent=getIntent();
dbHelper=new DBHelper(this);
db=dbHelper.getReadableDatabase();
id=intent.getStringExtra("memoid");
userid=intent.getStringExtra("user_id");
System.out.println("id:"+id);
SimpleDateFormat formatter = new SimpleDateFormat ("yyyy年MM月dd日 HH:mm:ss");
Date curDate = new Date(System.currentTimeMillis());
createDate=formatter.format(curDate);
String sql="select content from tb_memo where id=?";
Cursor cursor=db.rawQuery(sql,new String[]{id});
while(cursor.moveToNext()){
memo_info=cursor.getString(cursor.getColumnIndex("content"));
}
et2.setText(memo_info);
db.close();
}
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if (keyCode == android.view.KeyEvent.KEYCODE_BACK )
{
// 创建退出对话框
AlertDialog isExit = new AlertDialog.Builder(this).create();
// 设置对话框标题
isExit.setTitle("系统提示");
// 设置对话框消息
isExit.setMessage("确定要退出保存吗");
// 添加选择按钮并注册监听
isExit.setButton("确定", listener);
isExit.setButton2("取消", listener);
// 显示对话框
isExit.show();
}
return false;
}
DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
switch (which)
{
case AlertDialog.BUTTON_POSITIVE:// "确认"按钮退出程序
data=et2.getText().toString();
System.out.println("初始data:"+data);
if(data.length()<10&&data.length()>0){
System.out.println("data长度1："+data.length());
title=data;
db=dbHelper.getWritableDatabase();
contentValues.put("title", title);
contentValues.put("createDate",createDate);
contentValues.put("content",data);
System.out.println("有数据data:"+data);
System.out.println("data:"+data);
System.out.println("userid:"+userid);
System.out.println("title:"+title);
db.update("tb_memo",contentValues,"id=?",new String[]{id});
Intent intent=new Intent(showmemo.this,Memo.class);
intent.putExtra("id",userid);
startActivity(intent);
}else if(data.length()>=10){
System.out.println("data长度2："+data.length());
System.out.println("有数据data:"+data);
System.out.println("data:"+data);
System.out.println("userid:"+userid);
title=data.substring(0,10);
db=dbHelper.getWritableDatabase();
contentValues.put("title", title);
contentValues.put("createDate",createDate);
contentValues.put("content",data);
db.update("tb_memo",contentValues,"id=?",new String[]{id});
Intent intent=new Intent(showmemo.this,Memo.class);
intent.putExtra("id",userid);
startActivity(intent);
}
else{
System.out.println("data长度3："+data.length());
System.out.println("无数据data:"+data);
System.out.println("时间:"+createDate);
System.out.println("userid:"+userid);
Intent intent=new Intent(showmemo.this,Memo.class);
intent.putExtra("id",userid);
startActivity(intent);
}
db.close();
break;
case AlertDialog.BUTTON_NEGATIVE:// "取消"第二个按钮取消对话框
break;
default:
break;
}
}
};
}bean文件：
package com.example.jsjx.memo;
/**
* Created by liaof on 2018/6/11.
*/
public class Memo_info {
private String title;
private String content;
private String createDate;
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getCreateDate() {
return createDate;
}
public void setCreateDate(String createDate) {
this.createDate = createDate;
}
public Memo_info(String title, String createDate,int id) {
this.title = title;
this.createDate = createDate;
this.id=id;
}
}下面是所有页面布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/index_bg">
<TextView
android:id="@+id/index_title"
android:text="速 记"
android:textSize="26dp"
android:textStyle="bold"
android:layout_centerHorizontal="true"
android:layout_marginTop="150dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:id="@+id/line_user"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@id/index_title">
<TextView
android:id="@+id/username"
android:text="昵 称"
android:layout_marginLeft="5dp"
android:textSize="24sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edt_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:layout_marginLeft="5dp"
android:inputType="text"
android:hint="请输入昵称"
android:padding="5dp"/>
</LinearLayout>
<LinearLayout
android:id="@+id/line_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@id/line_user">
<TextView
android:id="@+id/password"
android:text="密 码"
android:layout_marginLeft="5dp"
android:textSize="24sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edt_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:layout_marginLeft="5dp"
android:inputType="textPassword"
android:hint="请输入密码"
android:padding="5dp"/>
</LinearLayout>
<Button
android:id="@+id/btn_login"
android:layout_below="@+id/line_password"
android:layout_width="80dp"
android:layout_marginTop="30dp"
android:layout_marginLeft="60dp"
android:background="@android:color/white"
android:text="登 录"
android:textSize="16sp"
android:layout_height="30dp" />
<Button
android:id="@+id/btn_go_register"
android:layout_below="@+id/line_password"
android:layout_toRightOf="@+id/btn_login"
android:layout_width="80dp"
android:layout_marginTop="30dp"
android:layout_marginLeft="100dp"
android:background="@android:color/white"
android:text="注 册"
android:textSize="16sp"
android:layout_height="30dp" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.example.jsjx.memo.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/welcome_word"
android:textSize="20sp"
android:textColor="@android:color/holo_blue_bright"
android:layout_width="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginLeft="5dp"
android:layout_height="wrap_content" />
<ImageButton
android:layout_width="40dp"
android:id="@+id/btn_add"
android:src="@drawable/add"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_marginRight="5dp"
/>
</RelativeLayout>
<ListView
android:id="@+id/lv_memoList"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/title"
android:text="标题"
android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="26sp"/>
<TextView
android:id="@+id/noticeDate"
android:textSize="10sp"
android:layout_alignParentRight="true"
android:layout_marginRight="5dp"
android:text="dafa"
android:layout_marginBottom="5dp"
android:layout_alignParentBottom="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/content"
android:layout_centerVertical="true"
android:text="法师法师法"
android:layout_marginLeft="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/getsqlId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
/>
<Button
android:id="@+id/btn_del"
android:layout_width="60dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:text="删除"
android:visibility="gone"
android:textColor="@android:color/white"
android:background="@android:color/holo_red_dark"
android:textSize="16sp"
android:layout_marginTop="5dp"/>
</RelativeLayout><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/index_bg">
<TextView
android:id="@+id/index_title"
android:text="注 册"
android:textSize="26dp"
android:textStyle="bold"
android:layout_centerHorizontal="true"
android:layout_marginTop="150dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:id="@+id/line_user"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@id/index_title">
<TextView
android:id="@+id/username"
android:text="昵 称"
android:layout_marginLeft="5dp"
android:textSize="24sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edt_setusername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:layout_marginLeft="5dp"
android:inputType="text"
android:hint="请输入昵称"
android:padding="5dp"/>
</LinearLayout>
<LinearLayout
android:id="@+id/line_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@id/line_user">
<TextView
android:id="@+id/password"
android:text="密 码"
android:layout_marginLeft="5dp"
android:textSize="24sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edt_setpassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:layout_marginLeft="5dp"
android:inputType="textPassword"
android:hint="请输入密码"
android:padding="5dp"/>
</LinearLayout>
<LinearLayout
android:id="@+id/line_confirm_pwd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@id/line_password">
<TextView
android:id="@+id/confirm_pwd"
android:text="确认密码"
android:layout_marginLeft="5dp"
android:textSize="24sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="@+id/edt_confirm_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:layout_marginLeft="5dp"
android:inputType="textPassword"
android:hint="请输入密码"
android:padding="5dp"/>
</LinearLayout>
<Button
android:id="@+id/btn_register"
android:layout_below="@+id/line_confirm_pwd"
android:layout_width="match_parent"
android:layout_marginTop="30dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="@android:color/white"
android:text="确定注册"
android:textSize="16sp"
android:layout_height="30dp" />
</RelativeLayout><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:id="@+id/edt1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top"
android:inputType="textMultiLine" />
</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:id="@+id/edt2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top"
android:inputType="textMultiLine" />
</LinearLayout>效果图：
用户：lisi密码：123
登入成功到成功页面：
新添信息：
多增加几条：
修改：第一条信息修改为0000000000
删除第一条：长按显示删除按钮
点击后效果：
我这个软件有待改进，但时间原因只能到这里了。祝大家好运，找到一份好工作！！加油
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