Android(安卓)app的音视频播放功能

结构文件

<?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:background="@color/gray"    android:orientation="vertical"    android:paddingBottom="16dp"    android:paddingLeft="16dp"    android:paddingRight="16dp"    android:paddingTop="16dp" >    <EditText        android:id="@+id/et_path"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="/sdcard/s1.mp4" />    <SeekBar        android:id="@+id/seekBar"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <Button            android:id="@+id/btn_play"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="播放" />        <Button            android:id="@+id/btn_pause"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="暂停" />        <Button            android:id="@+id/btn_replay"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="重播" />        <Button            android:id="@+id/btn_stop"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="停止" />    </LinearLayout>    <SurfaceView        android:id="@+id/sv"        android:layout_width="fill_parent"        android:layout_height="fill_parent" /></LinearLayout>

类文件

public class VideoActivity extends Activity {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;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_controller);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(click);btn_pause.setOnClickListener(click);btn_replay.setOnClickListener(click);btn_stop.setOnClickListener(click);// 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); sv.getHolder().setFormat(PixelFormat.TRANSLUCENT);// 为进度条添加进度更改事件seekBar.setOnSeekBarChangeListener(change);}private Callback callback = new Callback() {// SurfaceHolder被修改的时候回调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();}}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;}}public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {Log.i(TAG, "SurfaceHolder 大小被改变");}};private OnSeekBarChangeListener change = new OnSeekBarChangeListener() {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);}}public void onStartTrackingTouch(SeekBar seekBar) {}public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {}};private View.OnClickListener click = new View.OnClickListener() {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protected void play(final int msec) {// 获取视频文件地址String path = et_path.getText().toString().trim();File file = new File(path);if (!file.exists()) {Toast.makeText(this, "视频文件路径错误", 0).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SurfaceHoldermediaPlayer.setDisplay(sv.getHolder());Log.i(TAG, "开始装载");mediaPlayer.prepareAsync();mediaPlayer.setOnPreparedListener(new OnPreparedListener() {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() {@Overridepublic void run() {try {isPlaying = true;while (isPlaying) {int current = mediaPlayer.getCurrentPosition();seekBar.setProgress(current);sleep(500);}} catch (Exception e) {e.printStackTrace();}}}.start();btn_play.setEnabled(false);}});mediaPlayer.setOnCompletionListener(new OnCompletionListener() {public void onCompletion(MediaPlayer mp) {// 在播放完毕被回调btn_play.setEnabled(true);}});mediaPlayer.setOnErrorListener(new OnErrorListener() {public boolean onError(MediaPlayer mp, int what, int extra) {// 发生错误重新播放play(0);isPlaying = false;return false;}});} catch (Exception e) {e.printStackTrace();}}//重新开始播放protected void replay() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.seekTo(0);Toast.makeText(this, "重新播放", 0).show();btn_pause.setText("暂停");return;}isPlaying = false;play(0);}/** * 暂停或继续 */protected void pause() {if (btn_pause.getText().toString().trim().equals("继续")) {btn_pause.setText("暂停");mediaPlayer.start();Toast.makeText(this, "继续播放", 0).show();return;}if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.pause();btn_pause.setText("继续");Toast.makeText(this, "暂停播放", 0).show();}}}

更多相关文章

随机推荐