当我点击列表项时，我调用下一个活动并从哈希地图获取URL并将其分配给玩家活动现在我希望媒体播放器在后台运行如何可能？
Surah类从Fragment扩展
SurahlistView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Play_SuraData = data.get(position);
Intent i =new Intent(getActivity(), Player.class);
i.putExtra("PlayUrl", "one");
startActivity(i);
}
});
Player.java
package com.example.quranpak;
import java.io.IOException;
import com.s3.helpers.DownloadImageTask;
import com.s3.helpers.ImagesCache;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.os.Handler;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.SurfaceView;
import android.view.View;
import android.widget.ImageView;
import android.widget.MediaController;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.VideoView;
public class Player extends Activity implements OnPreparedListener,MediaController.MediaPlayerControl{
// VideoView Video_Player;
//
// DisplayMetrics dm;
// SurfaceView sur_View;
ImageView Player_img;
ProgressBar Player_img_progress;
MediaController media_Controller;
MediaPlayer mplayer;
ProgressDialog pDialog;
private String Path, FrmDownload_Qariname, FrmDownload_Suraname, FrmFavourites_Qariname, FrmFavourites_Suraname;
ImagesCache cache;
Bitmap bitmap;
String Key;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
cache = ImagesCache.getInstance();
// Create a progressbar
pDialog = new ProgressDialog(Player.this);
// Set progressbar title
pDialog.setTitle("Audio Streaming");
// Set progressbar message
pDialog.setMessage("Buffering...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
// Show progressbar
pDialog.show();
Player_img = (ImageView) findViewById(R.id.Player_img);
Player_img_progress = (ProgressBar) findViewById(R.id.Player_img_progress);
Key = getIntent().getExtras().getString("PlayUrl");
mplayer = new MediaPlayer();
media_Controller = new MediaController(this);
try {
if(Key.equals("one"))
{
bitmap = cache.getImageFromWarehouse(SurahActivity.Play_SuraData.get("qari_image"));
Path = SurahActivity.Play_SuraData.get("download_url");
FrmDownload_Qariname = SurahActivity.Play_SuraData.get("qari_name");
FrmDownload_Suraname = SurahActivity.Play_SuraData.get("sura_name");
}
else
{
bitmap = cache.getImageFromWarehouse(FavouriteActivity.Play_FavouriteData.get("qari_image"));
Path = FavouriteActivity.Play_FavouriteData.get("url");
FrmDownload_Qariname = FavouriteActivity.Play_FavouriteData.get("qari_name");
FrmDownload_Suraname = FavouriteActivity.Play_FavouriteData.get("name");
}
mplayer.setDataSource(Path);
mplayer.prepare();
mplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mplayer.setLooping(true);
mplayer.start();
}
catch (IOException e)
{
e.printStackTrace();
}
mplayer.setOnPreparedListener(this);
if(bitmap != null)
{
Player_img_progress.setVisibility(View.GONE);
Player_img.setImageBitmap(bitmap);
}
else
{
Player_img_progress.setVisibility(View.VISIBLE);
Player_img.setImageBitmap(null);
DownloadImageTask downloadImageTask = new DownloadImageTask(cache, Player_img, 300, 300);
downloadImageTask.execute(SurahActivity.Play_SuraData.get("qari_image"));
}
((TextView)findViewById(R.id.Player_Suraname)).setText(FrmDownload_Suraname);
((TextView)findViewById(R.id.Player_Qariname)).setText("By " + FrmDownload_Qariname);
}
@Override
protected void onResume() {
mplayer.start();
super.onResume();
}
@Override
public void onPrepared(MediaPlayer mp)
{
media_Controller.setMediaPlayer(this);
media_Controller.setAnchorView(findViewById(R.id.main_audio_view));
handler.post(new Runnable()
{
public void run()
{
pDialog.dismiss();
media_Controller.setEnabled(true);
media_Controller.show();
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
media_Controller.hide();
mplayer.stop();
// mplayer.release();
}
// @Override
// public void onBackPressed() {
//
// super.onBackPressed();
//
// getFragmentManager().popBackStack();
// }
// @Override
// protected void onStop() {
// super.onStop();
// media_Controller.hide();
// mplayer.stop();
// mplayer.release();
// }
@Override
public boolean onTouchEvent(MotionEvent event)
{
//the MediaController will hide after 3 seconds - tap the screen to make it appear again
media_Controller.show();
return false;
}
@Override
public boolean canPause()
{
return true;
}
@Override
public boolean canSeekBackward()
{
return true;
}
@Override
public boolean canSeekForward()
{
return true;
}
@Override
public int getAudioSessionId()
{
return 0;
}
@Override
public int getBufferPercentage()
{
return 0;
}
@Override
public int getCurrentPosition()
{
return mplayer.getCurrentPosition();
}
@Override
public int getDuration()
{
return mplayer.getDuration();
}
@Override
public boolean isPlaying()
{
return mplayer.isPlaying();
}
@Override
public void pause()
{
mplayer.pause();
// mplayer.release();
}
@Override
public void seekTo(int pos)
{
mplayer.seekTo(pos);
}
@Override
public void start()
{
mplayer.start();
}
}
答案 0 :(得分：0)
简单使用服务，例如你可以做这样的事情
public class MediaPlayerSevice extends Service implements OnCompletionListener,
OnPreparedListener,
OnErrorListener {
private String playURI = "";
private String songName = "";
private String albumName = "";
private String songDuration = "";
public MediaPlayer mediaPlayer;
private boolean playingAudio = false;
private int seek_position = 0;
public final static String LOGTAG = "MediaPlayerSevice";
public class MediaPlayerBinder extends Binder{
public MediaPlayerSevice getService() {
return MediaPlayerSevice.this;
}
}
private final IBinder mBinder = new MediaPlayerBinder();
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
public void startingAudioPlayback(String playURI,
String songName,
String albumName,
String songDuration) throws IllegalArgumentException,
SecurityException,
IllegalStateException,
IOException {
if (playingAudio) {
return;
}
this.playURI = playURI;
this.songName = songName;
this.albumName = albumName;
this.songDuration = songDuration;
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setDataSource(playURI);
mediaPlayer.prepare();
playingAudio = true;
}
public void changeAudioPlayback(String playURI,
String songName,
String albumName,
String songDuration) throws IllegalArgumentException, SecurityException, IllegalStateException, IOException {
if (playingAudio) {
return;
}
this.playURI = playURI;
this.songName = songName;
this.albumName = albumName;
this.songDuration = songDuration;
if(mediaPlayer==null)
mediaPlayer = new MediaPlayer();
mediaPlayer.stop();
mediaPlayer.reset();
mediaPlayer.setDataSource(playURI);
mediaPlayer.prepare();
playingAudio = true;
}
public void stopPlay(){
if(mediaPlayer!=null){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
}
public int getCurrentPosition() {
if(mediaPlayer!=null)
return mediaPlayer.getCurrentPosition();
else
return 0;
}
public int getDuration() {
if(mediaPlayer!=null)
return mediaPlayer.getDuration();
else
return 0;
}
public void seekTo(int i) {
if(mediaPlayer!=null)
mediaPlayer.seekTo(i);
}
public boolean isPlaying() {
if(mediaPlayer!=null)
return mediaPlayer.isPlaying();
else
return false;
}
public void start() {
if(mediaPlayer!=null)
mediaPlayer.start();
}
public void pause() {
if(mediaPlayer!=null)
mediaPlayer.pause();
}
public int getVideoWidth() {
if(mediaPlayer!=null)
mediaPlayer.getVideoWidth();
return 0;
}
public int getVideoHeight() {
if(mediaPlayer!=null)
mediaPlayer.getVideoHeight();
return 0;
}
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
seekTo(seek_position);
mediaPlayer.start();
}
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.stop();
mediaPlayer.release();
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
return false;
}
}