Android：如何在特定的毫秒数到来时停止播放媒体（mp3）？
|
我有一个mp3文件，我想在其中播放特定的单词。我有一个开始时间（
6889 ms
7254 ms
package com.example.playword;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.widget.TextView;
public class PlayWord extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final TextView tv = new TextView(this);
tv.setText(\"Playing...\");
setContentView(tv);
final MediaPlayer mPlayer = MediaPlayer.create(this, R.raw.nicholas);
try {
mPlayer.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mPlayer.seekTo(6889); //this is the start time
mPlayer.start();
//how can I end it at 7254 ms?
}
}
没有找到相关结果
已邀请:
2 个回复
扦帽次杏
安排执行将停止播放器的。您还应该仅在初始搜寻完成后才启动播放器。像这样：public class PlayWord extends Activity implements MediaPlayer.OnSeekCompleteListener { Handler mHandler; MediaPlayer mPlayer; int mStartTime = 6889; int mEndTime = 7254; final Runnable mStopAction = new Runnable() { @Override public void run() { mPlayer.stop(); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final TextView tv = new TextView(this); tv.setText(\"Playing...\"); setContentView(tv); mHandler = new Handler(); mPlayer = MediaPlayer.create(this, R.raw.nicholas); mPlayer.setOnSeekCompleteListener(this); mPlayer.seekTo(mStartTime); } @Override public void onDestroy() { mPlayer.release(); } @Override public void onSeekComplete (MediaPlayer mp) { mPlayer.start(); mHandler.postDelayed(mStopAction, mEndTime - mStartTime); } }方法将返回已经准备好的MediaPlayer，并且不应像在屏幕上的代码中那样再次调用。活动结束时，我还向添加了呼叫。 另外，如果要在搜索完成后更新UI，请注意，通常从非UI线程调用此方法。您将必须使用处理程序来发布任何与UI相关的操作。墩瓣茅械
In Oncreate Method ,use the below 4 lines code: MediaPlayer mPlayer = MediaPlayer.create(this, R.raw.nicholas); mPlayer.start(); mPlayer.seekTo(startTime); updatePlayerPostion(); private Handler handler=new Handler(){ @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub super.handleMessage(msg); updatePlayerPostion(); } }; updatePlayerPostion() { handler.removeCallbacks(r); if(player.getCurrentPosition==7254) player.stop(); else handler.postDelayed(r, 1); //1 millisecond } Runnable r=new Runnable(){ @Override public void run() { // TODO Auto-generated method stub updatePlayerPostion() } };