private final String TAG = “main”;
private EditText et_path;
private SurfaceView sv;
private Button btn_play, btn_pause, btn_replay, btn_stop;
private MediaPlayer mediaPlayer;
private SeekBar seekBar;
private int currentPosition = 0;
private boolean isPlaying;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_surfaceview);
init();
}
/**
- 初始化View控件
*/
private void init() {
seekBar = (SeekBar) findViewById(R.id.seekBar);
sv = (SurfaceView) findViewById(R.id.sv);
et_path = (EditText) findViewById(R.id.et_path);
btn_play = (Button) findViewById(R.id.btn_play);
btn_pause = (Button) findViewById(R.id.btn_pause);
btn_replay = (Button) findViewById(R.id.btn_replay);
btn_stop = (Button) findViewById(R.id.btn_stop);
btn_play.setOnClickListener(listener);
btn_pause.setOnClickListener(listener);
btn_replay.setOnClickListener(listener);
btn_stop.setOnClickListener(listener);
// 为SurfaceHolder添加回调
sv.getHolder().addCallback(callback);
// 4.0版本之下需要设置的属性
// 设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到界面
// sv.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// 为进度条添加进度更改事件
seekBar.setOnSeekBarChangeListener(change);
}
Callback callback = new Callback() {
// SurfaceHolder被修改的时候回调
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i(TAG, “SurfaceHolder 被销毁”);
// 销毁SurfaceHolder的时候记录当前的播放位置并停止播放
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
currentPosition = mediaPlayer.getCurrentPosition();
mediaPlayer.stop();
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i(TAG, “SurfaceHolder 被创建”);
if (currentPosition > 0) {
// 创建SurfaceHolder的时候，如果存在上次播放的位置，则按照上次播放位置进行播放
play(currentPosition);
currentPosition = 0;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Log.i(TAG, “SurfaceHolder 大小被改变”);
}
};
OnSeekBarChangeListener change = new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// 当进度条停止修改的时候触发
// 取得当前进度条的刻度
int progress = seekBar.getProgress();
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
// 设置当前播放的位置
mediaPlayer.seekTo(progress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
}
};
View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_play:
play(0);
break;
case R.id.btn_pause:
pause();
break;
case R.id.btn_replay:
replay();
break;
case R.id.btn_stop:
stop();
break;
default:
break;
}
}
};
/*
- 停止播放
*/
protected void stop() {
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
btn_play.setEnabled(true);
isPlaying = false;
}
}
/**
-
开始播放
-
@param msec 播放初始位置
*/
protected void play(final int msec) {
// 获取视频文件地址
String path = et_path.getText().toString().trim();
path = “/sdcard/cjyx.mp4”;
File file
= new File(path);
if (!file.exists()) {
Toast.makeText(this, “视频文件路径错误”, Toast.LENGTH_SHORT).show();
return;
}
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
// 设置播放的视频源
mediaPlayer.setDataSource(file.getAbsolutePath());
// 设置显示视频的SurfaceHolder
mediaPlayer.setDisplay(sv.getHolder());
Log.i(TAG, “开始装载”);
mediaPlayer.prepareAsync();
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
Log.i(TAG, “装载完成”);
mediaPlayer.start();
// 按照初始位置播放
mediaPlayer.seekTo(msec);
// 设置进度条的最大进度为视频流的最大播放时长
seekBar.setMax(mediaPlayer.getDuration());
// 开始线程，更新进度条的刻度
new Thread() {
@Override
public void run() {
try {
isPlaying = true;
w OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
Log.i(TAG, “装载完成”);
mediaPlayer.start();
// 按照初始位置播放
mediaPlayer.seekTo(msec);
// 设置进度条的最大进度为视频流的最大播放时长
seekBar.setMax(mediaPlayer.getDuration());
// 开始线程，更新进度条的刻度
new Thread() {
@Override
public void run() {
try {
isPlaying = true;
