使用MediaPlayer从网址播放视频时遇到问题。
以下程序：创建一个播放视频的活动 - ＆gt;按主页按钮 - ＆gt;回到app。
要求是视频播放从开始，按主页按钮视频连续播放（仅音频），当回到应用程序时，视频必须连续播放（组合电影和音频）。
首先，我创建了一个MediaPlayer变量来播放视频。按下主页按钮时，MediaPlayer连续播放。但是当回到应用程序时，视频无法显示（黑屏）。所以，我创建了其他MediaPlayer变量来解决这个问题。但是当我使用seekTo()函数寻找第二个MediaPlayer到第一个MediaPlayer的位置时，此函数工作不正确。
import java.io.IOException;
import com.example.videotest.R;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.OnSeekCompleteListener;
import android.media.MediaPlayer.OnVideoSizeChangedListener;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.Toast;
public class PlayVideoActivity extends Activity implements OnClickListener,SurfaceHolder.Callback, FGMediaController.MediaPlayerControl {
SurfaceView videoSurface,videoSurfaceFullscreen,videoSurfaceSmallsceen;
MediaPlayer player, backupPlayer;
FGMediaController controller;
LinearLayout llControllerBar;
public boolean isFullscreen = false;
int videoDuration;
int videoCurrent;
SurfaceHolder viewHolder = null;
boolean isPaused = false;
String videoUrl = "http://cdn-smatopi.tv-bank.com/movie/867/867-32/867-32-2015042306-D3/hls/hls3/867-32-2015042306-D3-HLS3.m3u8";
Button btnSeek, btnRelease;
int currentPos = 30000;
boolean videoPrepared = false;
boolean backupPrepared = false;
boolean mVideoSizeIsSet = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.playvideo);
btnSeek = (Button) findViewById(R.id.btnSeek);
btnRelease = (Button) findViewById(R.id.btnRelease);
videoSurface = (SurfaceView)findViewById(getResources().getIdentifier("vvVideo", "id", getPackageName()));
SurfaceHolder videoHolder = videoSurface.getHolder();
videoHolder.addCallback(this);
player = new MediaPlayer();
backupPlayer = new MediaPlayer();
controller = new FGMediaController(this);
try {
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setDataSource(this, Uri.parse(videoUrl));
player.prepareAsync();
//backupPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//backupPlayer.setDataSource(this, Uri.parse(videoUrl));
//backupPlayer.prepareAsync();
} catch (Exception e) {
e.printStackTrace();
}
btnSeek.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.e("Huhu",currentPos + "");
backupPlayer.seekTo(currentPos);
}
});
btnRelease.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
backupPlayer.stop();
backupPlayer.release();
}
});
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
}
});
player.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
controller.setMediaPlayer(PlayVideoActivity.this);
controller.setAnchorView((FrameLayout) findViewById(PlayVideoActivity.this.getResources().getIdentifier("videoSurfaceContainer", "id", PlayVideoActivity.this.getPackageName())));
player.start();
}
});
}
@Override
public void onDestroy(){
//backupPlayer.release();
player.release();
super.onDestroy();
}
@Override
public void onResume(){
Log.e("Surface Created","OnResume");
super.onResume();
}
// Implement SurfaceHolder.Callback
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.e("Surface Created","Surface Created! " + holder);
if(viewHolder != null){
viewHolder = holder;
backupPlayer = new MediaPlayer();
try {
backupPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
backupPlayer.setDataSource(this, Uri.parse(videoUrl));
backupPlayer.prepareAsync();
backupPlayer.setDisplay(holder);
backupPlayer.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
backupPrepared = true;
backupPlayer.start();
}
});
backupPlayer.setOnVideoSizeChangedListener(new OnVideoSizeChangedListener() {
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
// TODO Auto-generated method stub
if (width == 0 || height == 0){
Toast.makeText(getApplicationContext(),"Width = 0 Height = 0"+ mp.getDuration(), Toast.LENGTH_LONG).show();
}else{
if(backupPrepared){
backupPrepared = false;
currentPos = player.getCurrentPosition();
player.reset();
Toast.makeText(getApplicationContext(),"Seek To "+ backupPlayer.getCurrentPosition() + " | " + backupPlayer.isPlaying() + "|" + currentPos, Toast.LENGTH_LONG).show();
Log.e("Huhu","Seek To "+ backupPlayer.getCurrentPosition() + " | " + backupPlayer.isPlaying() + "|" + currentPos);
backupPlayer.seekTo(currentPos); // If you set currentPos = 20000ms or 30000ms backupPlayer can to seek, but if you set currentPos = 10000ms backupPlayer cannot seek !
}
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}else{
player.setDisplay(holder);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.e("Surface Created","surfaceDestroyed! " + player.getCurrentPosition());
viewHolder = holder;
}
// End MediaPlayer.OnPreparedListener
// Implement VideoMediaController.MediaPlayerControl
@Override
public boolean canPause() {
return true;
}
@Override
public boolean canSeekBackward() {
return true;
}
@Override
public boolean canSeekForward() {
return true;
}
@Override
public int getBufferPercentage() {
return 0;
}
@Override
public int getCurrentPosition() {
//Log.printLog(Log.ERROR, "CURRENT :"+player.getCurrentPosition());
int current = 0;
try{
current = player.getCurrentPosition();
}catch(Exception e){
e.printStackTrace();
}
return current;
}
@Override
public int getDuration() {
int duration = 0;
try{
duration = player.getDuration();
}catch(Exception e){
e.printStackTrace();
}
return duration;
}
@Override
public boolean isPlaying() {
boolean isPlaying = false;
try{
isPlaying = player.isPlaying();
}catch(Exception e){
e.printStackTrace();
}
return isPlaying;
}
@Override
public void pause() {
player.pause();
}
@Override
public void seekTo(int i) {
player.seekTo(i);
}
@Override
public void start() {
player.start();
}
@Override
public boolean isFullScreen() {
return isFullscreen;
}
@Override
public void toggleFullScreen() {
// TODO Auto-generated method stub
}
@Override
public void doBackPressed() {
// TODO Auto-generated method stub
}
@Override
public void onClick(View v) {
}
}