Java 按下后退或主页按钮停止mediaplayer声音

我得到了开关和新的布局工作，谢谢大家。最后一个问题。如果用户按下后退或主页按钮，我希望音乐停止播放。这是代码，我不知道我遗漏了什么

package com.androidsleepmachine.gamble;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

public class Ocean extends Activity implements View.OnClickListener {
 public static final Integer[] TIME_IN_MINUTES = { 30, 45, 60, 180, 360 };
public MediaPlayer mediaPlayer;
public Handler handler = new Handler();
public Button button1;
public Spinner spinner1;

// Initialize the activity
@Override
public void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    setContentView(R.layout.ocean);

    button1 = (Button) findViewById(R.id.btn1);
    button1.setOnClickListener(this);
    spinner1 = (Spinner) findViewById(R.id.spinner1);
    ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(this,  
android.R.layout.simple_spinner_item, TIME_IN_MINUTES);          
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);          
    spinner1.setAdapter(adapter); 
}

// Play the sound and start the timer
private void playSound(int resourceId) {
    // Cleanup any previous sound files
    cleanup();
    // Create a new media player instance and start it
    mediaPlayer = MediaPlayer.create(this, resourceId);
    mediaPlayer.start();
    // Create the timer to stop the sound after x number of milliseconds
    int selectedTime = TIME_IN_MINUTES[spinner1.getSelectedItemPosition()];
    handler.postDelayed(runnable, selectedTime * 60 * 1000);
}

// Handle button callback
@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.btn1:
            playSound(R.raw.ocean_birds);
            break;
    }
}

// Stop the sound and cleanup the media player
public void cleanup() {
    if (mediaPlayer != null) {
        mediaPlayer.stop();
        mediaPlayer.release();
        mediaPlayer = null;
    }
    // Cancel any previously running tasks
    handler.removeCallbacks(runnable);
}

// Runnable task used by the handler to stop the sound
public Runnable runnable = new Runnable() {
    public void run() {
        cleanup();
    }
};
}

---

您需要检查用户是否关闭了应用程序或只是切换到其他活动。 你可以检查我的答案

希望能有帮助

编辑

在

ship

类中检查这两种方法

 @Override
    protected void onStop() {
        Log.d(TAG, "App stopped");

        super.onStop();
    }

    @Override
    protected void onDestroy() {
        Log.d(TAG, "App destoryed");

        super.onDestroy();
    }

在钥匙上使用

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
            stop sound!
            return true;
        }
        return super.onKeyUp(keyCode, event);
    }

---

我在顶部设置了受保护的void（）{if（this.mediaPlayer！=null）this.mediaPlayer.stop（）；}一切正常，当按下“后退”按钮时音乐停止，但一旦返回一个屏幕，它就会强制关闭。

public void onCreate（Bundle savedInstanceState）{super.onCreate（savedInstanceState）；

onCreate（）公共void onCreate（Bundle savedInstanceState）{super.onCreate（savedInstanceState）；这仍然迫使你的飞船类使用closesCheck-On-stop方法。你也可以发布该类的更新代码。检查我的编辑答案。确保你的所有类都包含该方法。停止声音！不工作，停止声音应该是什么！参考我的代码？当我们没有使用时，“停止声音！”应该是什么ve View Object禁用音效？Lol

停止音效！

，这对您帮助很大，先生

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
            stop sound!
            return true;
        }
        return super.onKeyUp(keyCode, event);
    }