如何在用戶按Home時停止活動？

Question

我正在創建一個音樂應用程序。我有一個問題：當用戶按下/ home時，音樂繼續播放。

Here is my APK file

我怎麼能允許用戶返回到主活動和清除當前的活動（播放音樂）？

Answer 1

你需要重寫onPause()或onStop()和停止音樂在那裏。

Answer 2

您可以使用您的活動的onPause（）停止或暫停的媒體播放器。

覆蓋了的onPause（）這樣的，

@Override 
protected void onPause() 
{ 
    super.onPause(); 
    if(mediaplayer!=null) 
{ 
    mediaplayer.pause(); 
} 
} 

而當你再次輸入您的活動，覆蓋的onResume（）這樣的，

@Override 
      protected void onResume() { 
       super.onResume(); 

if(mediaplayer!=null) 
{ 
    mediaplayer.start(); 
} 
} 

Answer 3

的的onPause和的OnStart之間切換重要 onPause（）方法被overrided給這個實例的回放控制。 還ü可以參考this

package org.example.audio; 

import android.app.Activity; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.Toast; 

public class AudioDemo extends Activity implements OnClickListener { 
    private static final String TAG = "AudioDemo"; 
    private static final String isPlaying = "Media is Playing"; 
    private static final String notPlaying = "Media has stopped Playing"; 

    MediaPlayer player; 
    Button playerButton; 

    public void onClick(View v) { 
     Log.d(TAG, "onClick: " + v); 
     if (v.getId() == R.id.play) { 
      playPause(); 
     } 
    } 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     player = MediaPlayer.create(this, R.raw.robotrock); 
     player.setLooping(false); // Set looping 

     // Get the button from the view 
     playerButton = (Button) this.findViewById(R.id.play); 
     playerButton.setText(R.string.stop_label); 
     playerButton.setOnClickListener(this); 

     // Begin playing selected media 
     demoPlay(); 

     // Release media instance to system 
     player.release(); 

    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     player.pause(); 
    } 

    // Initiate media player pause 
    private void demoPause(){ 
      player.pause(); 
      playerButton.setText(R.string.play_label); 
      Toast.makeText(this, notPlaying, Toast.LENGTH_LONG).show(); 
      Log.d(TAG, notPlaying); 
    } 

    // Initiate playing the media player 
    private void demoPlay(){ 
      player.start(); 
      playerButton.setText(R.string.stop_label); 
      Toast.makeText(this, isPlaying, Toast.LENGTH_LONG).show(); 
      Log.d(TAG, isPlaying); 
    } 

    // Toggle between the play and pause 
    private void playPause() { 
     if(player.isPlaying()) { 
      demoPause(); 
     } else { 
      demoPlay(); 
     } 
    } 
} 

Answer 4

當用戶點擊後退按鈕時進入下面的方法內（插入代碼此方法）

@Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
    super.onKeyDown(keyCode, event); 
            if (keyCode == KeyEvent.KEYCODE_BACK) { 
                    // code to pause or stop the music!!!! 
            } 
            **return false;** 
        } 

Answer 5

嘗試重寫onWindowsFocusChanged(boolean hasFocus)方法。