Android——播放器和图片轮播

layout文件：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.hanqi.musicplay.MainActivity"
11     android:orientation="vertical">
12 
13     <TextView
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:text="播放状态:未播放"
17         android:id="@+id/tv_1"/>
18     <ProgressBar
19         android:layout_width="match_parent"
20         android:layout_height="wrap_content"
21         android:id="@+id/pb_1"
22         style="@android:style/Widget.ProgressBar.Horizontal"/>
23     <LinearLayout
24         android:layout_width="match_parent"
25         android:layout_height="wrap_content">
26         <Button
27             android:layout_width="0dp"
28             android:layout_height="wrap_content"
29             android:layout_weight="1"
30             android:onClick="play_onClick"
31             android:text="播放"
32             android:background="@drawable/a4"/>
33         <Button
34             android:layout_width="0dp"
35             android:layout_height="wrap_content"
36             android:layout_weight="1"
37             android:onClick="pause_onClick"
38             android:text="暂停"
39             android:background="@drawable/a4"/>
40         <Button
41             android:layout_width="0dp"
42             android:layout_height="wrap_content"
43             android:layout_weight="1"
44             android:onClick="stop_onClick"
45             android:text="停止"
46             android:background="@drawable/a4"/>
47         <!--<Button-->
48             <!--android:layout_width="0dp"-->
49             <!--android:layout_height="wrap_content"-->
50             <!--android:layout_weight="1"-->
51             <!--android:onClick="exit_onClick"-->
52             <!--android:text="退出"/>-->
53     </LinearLayout>
54     <TextView
55         android:layout_width="match_parent"
56         android:layout_height="wrap_content"
57         android:id="@+id/tv_2"/>
58     <ImageView
59         android:layout_width="match_parent"
60         android:layout_height="wrap_content"
61         android:id="@+id/iv_1"/>
62 </LinearLayout>

activity_main

java类：

  1 package com.hanqi.musicplay;
  2 
  3 import android.media.MediaPlayer;
  4 import android.os.Handler;
  5 import android.os.Message;
  6 import android.support.v7.app.AppCompatActivity;
  7 import android.os.Bundle;
  8 import android.view.View;
  9 import android.widget.ImageView;
 10 import android.widget.ProgressBar;
 11 import android.widget.TextView;
 12 
 13 public class MainActivity extends AppCompatActivity {
 14 
 15     ProgressBar pb_1;
 16     TextView tv_1;
 17     MediaPlayer mediaPlayer;
 18     ImageView iv_1;
 19     Handler handler;
 20     @Override
 21     protected void onCreate(Bundle savedInstanceState) {
 22         super.onCreate(savedInstanceState);
 23         setContentView(R.layout.activity_main);
 24         pb_1 = (ProgressBar)findViewById(R.id.pb_1);
 25         tv_1 = (TextView)findViewById(R.id.tv_1);
 26         iv_1 = (ImageView)findViewById(R.id.iv_1);
 27 
 28         final int[]iv = {R.drawable.b11,R.drawable.b21,R.drawable.b3,R.drawable.b41};
 29         handler = new Handler(){
 30             @Override
 31             public void handleMessage(Message msg) {
 32                 super.handleMessage(msg);
 33                 iv_1.setImageResource(iv[msg.arg1]);
 34             }
 35         };
 36         //图片轮播 在分线程
 37         new Thread(new Runnable() {
 38             @Override
 39             public void run() {
 40 
 41                for (int i = 0;i<iv.length;i++)
 42                 {
 43                     //iv_1.setImageResource(iv[i]);
 44                     Message message = new Message();
 45                     message.what = 0;
 46                     message.arg1 = i;
 47                     handler.sendMessage(message);
 48                     try {
 49                         Thread.sleep(2000);
 50                     }
 51                     catch (Exception e)
 52                     {
 53 
 54                     }
 55                     if (i == iv.length-1)i=-1;
 56                 }
 57             }
 58         }).start();
 59 
 60     }
 61     //播放
 62     public void play_onClick(View v)
 63     {
 64         //构造mediaPlayer
 65         if (mediaPlayer == null)
 66         {
 67             //用静态方法构造
 68             mediaPlayer = MediaPlayer.create(this,R.raw.test);
 69             mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
 70                 @Override
 71                 public void onCompletion(MediaPlayer mp) {
 72                     tv_1.setText("播放状态：播放完成");
 73                     mediaPlayer.reset();
 74                     mediaPlayer.release();
 75                     mediaPlayer = null;
 76                 }
 77             });
 78             //设置进度条的最大长度
 79             pb_1.setMax(mediaPlayer.getDuration());
 80             //启动分线程
 81             new Thread(){
 82                 @Override
 83                 public void run() {
 84                     //循环条件
 85                     while (mediaPlayer != null)
 86                     {
 87                         //更新进度
 88                         //设置当前进度值：和播放器的当前进度有关
 89                         pb_1.setProgress(mediaPlayer.getCurrentPosition());
 90                         try {
 91                             Thread.sleep(500);
 92                         }
 93                         catch (Exception e)
 94                         {
 95 
 96                         }
 97                     }
 98                 }
 99             }.start();
100         }
101         mediaPlayer.start();
102         tv_1.setText("播放状态：正在播放");
103     }
104     //停止
105     public void stop_onClick(View v)
106     {
107         if (mediaPlayer != null)
108         {
109             mediaPlayer.stop();
110             mediaPlayer.reset();
111             mediaPlayer.release();
112             mediaPlayer = null;
113             pb_1.setProgress(0);
114             tv_1.setText("播放状态：停止播放");
115         }
116     }
117     //暂停
118     public void pause_onClick(View v)
119     {
120         if (mediaPlayer != null && mediaPlayer.isPlaying())
121         {
122            mediaPlayer.pause();
123             tv_1.setText("播放状态：暂停播放");
124         }
125 
126     }
127     //退出
128 //    public void exit_onClick(View v)
129 //    {
130 //        stop_onClick(v);
131 //        finish();
132 //    }
133 }

MainActivity

效果为：