使用SurfaceView+Medaplayer+SeekBar完成视频的播放加进度条

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在主页面中activity_main布局中

<?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="alice.bw.com.day03surfaceviewmedaplayerseekbar3.MainActivity">

<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="400dp" />

<SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">

<Button
android:id="@+id/play_bt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClick"
android:text="播放" />

<Button
android:id="@+id/pause_bt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClick"
android:text="暂停" />

</LinearLayout>
</LinearLayout>

在主页面Activity中

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback{
private SurfaceView surfaceView;
private SeekBar seekBar;
private SurfaceHolder holder;
private MediaPlayer player;

//更改进度的广播
private ProgressReceiver receiver;
private boolean flag = true;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}

//初始化各种组件
private void init() {
// 实例化播放器
player = MediaPlayer.create(this, R.raw.a);
// surfaceView
surfaceView = ((SurfaceView) findViewById(R.id.surfaceView));
//进度条
seekBar = ((SeekBar) findViewById(R.id.seekBar));
// 广播接收者
receiver = new ProgressReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction("alice.com.player");
//动态注册
registerReceiver(receiver, filter);

//surfaceHolder
holder = surfaceView.getHolder();
holder.addCallback(this);
// 固定surfaceView的屏幕大小
holder.setKeepScreenOn(true);
//SURFACE_TYPE_PUSH_BUFFERS表明该Surface不包含原生数据，
// Surface用到的数据由其他对象提供，在Camera图像预览中就使用该类型的Surface，
// 有Camera负责提供给预览Surface数据，这样图像预览会比较流畅。
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

// 给seekBar 设置一个最大值，最大值是 MediaPlayer的长度
seekBar.setMax(player.getDuration());
seekBar.setProgress(0);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
/*
参数二：代表当前seekBar滑动的进度
参数三： true 表示手指拖拽 false 表示设置进度
当拖动条发生变化时调用该方法
*/
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
if (b)
player.seekTo(i);
}

//当用户开始滑动滑块时调用该方法（即按下鼠调用一次）
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
Log.d("sxl", "onStartTrackingTouch: ");
player.pause();
}

//当用户结束对滑块滑动时,调用该方法（即松开鼠标）
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
Log.d("sxl", "onStopTrackingTouch: ");
player.start();

}
});

}

public void onClick(View view) {

switch (view.getId()) {
case R.id.play_bt:
// 开始播放
if (player != null && !player.isPlaying())
player.start();

break;
case R.id.pause_bt:
if (player != null && player.isPlaying())
player.pause();
break;
}
}

@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
// 设置显示 View
if (player != null)
player.setDisplay(surfaceHolder);//绑定
// 开启记录时间的线程
new MyThread().start();
}

@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

}

@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {

}

class MyThread extends Thread {
@Override
public void run() {
super.run();
Intent intent = new Intent();
intent.setAction("alice.com.player");
while (flag) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (player != null) {
// 发送广播更新 seekBar 当前进度
int currentPosition = player.getCurrentPosition();
intent.putExtra("progress", currentPosition);
sendBroadcast(intent);
}
}
}
}

class ProgressReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int progress = intent.getIntExtra("progress", 0);
//接收进度并更新 seekBar
seekBar.setProgress(progress);
}
}

// 销毁的时候需要处理
@Override
protected void onDestroy() {
super.onDestroy();
flag = false;
unregisterReceiver(receiver);
if (player != null) {
player.release();
player = null;
}
}
}

在java代码中动态注册了广播所以在清单文件中不用再注册了

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="alice.bw.com.day03surfaceviewmedaplayerseekbar3">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>

<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>

</manifest>

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