Android -- 视频音频多媒体播放，在线播放， MediaPlayer, SurfaceView, SoundPool, Timer定时器使用

1. SoundPool 用于快速重复的播放短音频

public class MainActivity extends Activity {private SoundPool soundPool;private int soundId;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);// 把声音资源预先加载到声音池， load为异步方法//声音资源放到 res/raw目录下， raw名字须固定soundId = soundPool.load(this, R.raw.ring, 1);}public void click(View view) {soundPool.play(soundId, 1.0f, 1.0f, 0, 0, 1.0f);}}

 

2. 视频播放示例代码 （播放暂停，进度条拖放等功能）

输入的路径不仅可以是本地的视频路径，也可以是一个网络视频路径，播放器会自动在线播放，不过需要添加 Internet权限。

activity_main.xml 布局文件

<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=".MainActivity" >    <EditText        android:text="/sdcard/oppo.mp4"        android:id="@+id/et_path"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="请输入视频文件的路径" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <Button            android:id="@+id/bt_play"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="播放" />        <Button            android:id="@+id/bt_pause"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="暂停" />        <Button            android:id="@+id/bt_replay"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="重播" />        <Button            android:id="@+id/bt_stop"            android:layout_width="0dip"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="停止" />    </LinearLayout>    <SeekBar        android:id="@+id/seek_bar"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <SurfaceView        android:id="@+id/sv"        android:layout_width="fill_parent"        android:layout_height="fill_parent" /></LinearLayout>

MainActivity.java

import java.io.File;import java.io.IOException;import java.util.Timer;import java.util.TimerTask;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {private Button bt_play;private Button bt_replay;private Button bt_stop;private Button bt_pause;private EditText et_path;private SurfaceView sv;private MediaPlayer mediaPlayer;private int position;private SeekBar seek_bar;private Timer timer;private TimerTask task;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);bt_play = (Button) findViewById(R.id.bt_play);bt_replay = (Button) findViewById(R.id.bt_replay);bt_stop = (Button) findViewById(R.id.bt_stop);bt_pause = (Button) findViewById(R.id.bt_pause);sv = (SurfaceView) findViewById(R.id.sv);seek_bar = (SeekBar) findViewById(R.id.seek_bar);seek_bar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {if(mediaPlayer!=null){mediaPlayer.seekTo(seekBar.getProgress());}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {}});/* 下面设置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用户面前 */sv.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);sv.getHolder().addCallback(new Callback() {@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {System.out.println("holder 被销毁了.");if (mediaPlayer != null && mediaPlayer.isPlaying()) {position = mediaPlayer.getCurrentPosition();stop();}}@Overridepublic void surfaceCreated(SurfaceHolder holder) {System.out.println("holder 被创建了.");if (position != 0) {play();mediaPlayer.seekTo(position);}}// 主要是当holder的大小发生变化的时候 调用@Overridepublic void surfaceChanged(SurfaceHolder holder, int format,int width, int height) {}});bt_play.setOnClickListener(this);bt_replay.setOnClickListener(this);bt_stop.setOnClickListener(this);bt_pause.setOnClickListener(this);et_path = (EditText) findViewById(R.id.et_path);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.bt_play:play();break;case R.id.bt_replay:replay();break;case R.id.bt_stop:stop();break;case R.id.bt_pause:pause();break;}}/** * 重新播放 */private void replay() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.seekTo(0);} else {play();}}/** * 停止播放 */private void stop() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.stop();mediaPlayer.release();mediaPlayer = null;bt_play.setEnabled(true);if (timer != null && task != null) {timer.cancel();task.cancel();timer = null;task = null;}}}/** * 暂停播放 */private void pause() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {// 暂停播放mediaPlayer.pause();bt_pause.setText("继续");return;}if (mediaPlayer != null) {if ("继续".equals(bt_pause.getText().toString())) {mediaPlayer.start();bt_pause.setText("暂停");return;}}}/** * 播放 */private void play() {String path = et_path.getText().toString().trim();File file = new File(path);//添加判断条件，如果路径带http 网路视频在线播放if ( (file.exists() && file.length() > 0) || path.contains("http")) {try {mediaPlayer = new MediaPlayer();mediaPlayer.reset();// 重置为初始状态mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);/* 设置Video影片以SurfaceHolder播放 */mediaPlayer.setDisplay(sv.getHolder());mediaPlayer.setDataSource(path);//prepare同步准备//prepareAsync为异步准备,不会阻塞主线程，需要注册OnPrepareListener， 并在其中执行start()mediaPlayer.prepare();mediaPlayer.start();// 播放int max = mediaPlayer.getDuration();seek_bar.setMax(max);// 创建一个定时器timer = new Timer();// 创建一个定时器执行的任务task = new TimerTask() {@Overridepublic void run() {int position = mediaPlayer.getCurrentPosition();seek_bar.setProgress(position);}};timer.schedule(task, 0, 1000);} catch (Exception e) {e.printStackTrace();Toast.makeText(this, "播放失败", 1).show();}}}}

 

3. 音频播放示例：类似于视频播放

MainActivity.java

import java.io.File;import java.io.IOException;import android.app.Activity;import android.media.AudioManager;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.media.MediaPlayer.OnErrorListener;import android.media.MediaPlayer.OnPreparedListener;import android.os.Bundle;import android.telephony.PhoneStateListener;import android.telephony.TelephonyManager;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {private Button bt_play;private Button bt_replay;private Button bt_stop;private Button bt_pause;private EditText et_path;private MediaPlayer mediaPlayer;private TelephonyManager tm;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);bt_play = (Button) findViewById(R.id.bt_play);bt_replay = (Button) findViewById(R.id.bt_replay);bt_stop = (Button) findViewById(R.id.bt_stop);bt_pause = (Button) findViewById(R.id.bt_pause);bt_play.setOnClickListener(this);bt_replay.setOnClickListener(this);bt_stop.setOnClickListener(this);bt_pause.setOnClickListener(this);et_path = (EditText) findViewById(R.id.et_path);tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);tm.listen(new MyListener(), PhoneStateListener.LISTEN_CALL_STATE);}private class MyListener extends PhoneStateListener{@Overridepublic void onCallStateChanged(int state, String incomingNumber) {switch (state) {case TelephonyManager.CALL_STATE_RINGING:pause();break;case TelephonyManager.CALL_STATE_IDLE:pause();break;}super.onCallStateChanged(state, incomingNumber);}}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.bt_play:play();break;case R.id.bt_replay:replay();break;case R.id.bt_stop:stop();break;case R.id.bt_pause:pause();break;}}/** * 重新播放 */private void replay() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.seekTo(0);}else{play();}}/** * 停止播放 */private void stop() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {mediaPlayer.stop();mediaPlayer.release();mediaPlayer = null;bt_play.setEnabled(true);}}/** * 暂停播放 */private void pause() {if (mediaPlayer != null && mediaPlayer.isPlaying()) {// 暂停播放mediaPlayer.pause();bt_pause.setText("继续");return;}if (mediaPlayer != null) {if ("继续".equals(bt_pause.getText().toString())) {mediaPlayer.start();bt_pause.setText("暂停");return;}}}/** * 处理播放 */private void play() {String path = et_path.getText().toString().trim();File file = new File(path);if (file.exists() && file.length() > 0) {try {mediaPlayer = new MediaPlayer();mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);mediaPlayer.setDataSource(path);//mediaPlayer.setLooping(looping);//播放完毕后的 事件监听器mediaPlayer.setOnCompletionListener(new OnCompletionListener() {@Overridepublic void onCompletion(MediaPlayer mp) {bt_play.setEnabled(true);}});mediaPlayer.setOnErrorListener(new OnErrorListener() {@Overridepublic boolean onError(MediaPlayer mp, int what, int extra) {bt_play.setEnabled(true);Toast.makeText(MainActivity.this, "音乐文件错误", 0).show();return false;}});//mediaPlayer.prepare();//同步准备.mediaPlayer.prepareAsync();//异步准备 在一个新的子线程里面准备//通知用户缓存中...mediaPlayer.setOnPreparedListener(new OnPreparedListener() {@Overridepublic void onPrepared(MediaPlayer mp) {//通知用户开始播放...mediaPlayer.start();}});bt_play.setEnabled(false);} catch (Exception e) {e.printStackTrace();Toast.makeText(this, "播放音乐失败", 0).show();}} else {Toast.makeText(this, "音乐文件不存在", 0).show();}}}