收到电话时，MediaPlayer不会暂停。如果有人能提供帮助就会很棒！
代码：
public class player1 extends Activity implements Runnable {
private MediaPlayer mp;
private ProgressBar progressBar;
private ImageButton pauseicon;
private final int NUM_SOUND_FILES = 3; //*****REPLACE THIS WITH THE ACTUAL NUMBER OF SOUND FILES YOU HAVE*****
private int mfile[] = new int[NUM_SOUND_FILES];
private Random rnd = new Random();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player_1);
pauseicon = (ImageButton) findViewById(R.id.pauseicon);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
getActionBar().setDisplayHomeAsUpEnabled(true);
mfile[0] = R.raw.sound01; //****REPLACE THESE WITH THE PROPER NAMES OF YOUR SOUND FILES
mfile[1] = R.raw.sound02; //PLACE THE SOUND FILES IN THE /res/raw/ FOLDER IN YOUR PROJECT*****
mfile[2] = R.raw.sound03;
// Listeners
/**
* Play button click event
* plays a song and changes button to pause image
* pauses a song and changes button to play image
* */
try{
mp = MediaPlayer.create(player1.this, mfile[rnd.nextInt(NUM_SOUND_FILES)]);
mp.seekTo(0);
mp.start(); ;
progressBar.setVisibility(ProgressBar.VISIBLE);
progressBar.setProgress(0);
progressBar.setMax(mp.getDuration());
new Thread(this).start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
}
PhoneStateListener phoneStateListener = new PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
mp.pause();
} else if(state == TelephonyManager.CALL_STATE_IDLE) {
//Not in call: Play music
} else if(state == TelephonyManager.CALL_STATE_OFFHOOK) {
//A call is dialing, active or on hold
}
super.onCallStateChanged(state, incomingNumber);
}
};
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
pauseicon.setImageResource(R.drawable.playicon);
mp.seekTo(0);
}
});
pauseicon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(mp.isPlaying()) {
mp.pause();
((ImageButton) v).setImageResource(R.drawable.playicon);
} else {
mp.start();
((ImageButton) v).setImageResource(R.drawable.pauseicon);
}
}
});
}
static boolean runThread = true;
public void run() {
while ( runThread ) {
int currentPosition=0;
int total = mp.getDuration();
if ( mp != null && currentPosition <= total ) {
try {
Thread.sleep(1000);
currentPosition= mp.getCurrentPosition();
} catch (InterruptedException e) {
return;
} catch (Exception e) {
return;
}
progressBar.setProgress(currentPosition);
} else
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
runThread = false;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
if (mp != null)
if(mp.isPlaying())
mp.stop();
mp.release();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onBackPressed(){
if (mp != null){
if(mp.isPlaying())
mp.stop();
mp.release();
}
//there is no reason to call super.finish(); here
//call super.onBackPressed(); and it will finish that activity for you
super.onBackPressed();
}
}
新错误
09-10 19:41:45.250: E/AndroidRuntime(18428): FATAL EXCEPTION: main
09-10 19:41:45.250: E/AndroidRuntime(18428): java.lang.RuntimeException: Unable to pause activity {com.example.mediaplayer/com.example.mediaplayer.player1}: java.lang.IllegalStateException
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3064)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3019)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2997)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.access$800(ActivityThread.java:141)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1273)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.os.Handler.dispatchMessage(Handler.java:99)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.os.Looper.loop(Looper.java:137)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-10 19:41:45.250: E/AndroidRuntime(18428): at java.lang.reflect.Method.invokeNative(Native Method)
09-10 19:41:45.250: E/AndroidRuntime(18428): at java.lang.reflect.Method.invoke(Method.java:525)
09-10 19:41:45.250: E/AndroidRuntime(18428): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-10 19:41:45.250: E/AndroidRuntime(18428): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-10 19:41:45.250: E/AndroidRuntime(18428): at dalvik.system.NativeStart.main(Native Method)
09-10 19:41:45.250: E/AndroidRuntime(18428): Caused by: java.lang.IllegalStateException
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.media.MediaPlayer.isPlaying(Native Method)
09-10 19:41:45.250: E/AndroidRuntime(18428): at com.example.mediaplayer.player1.onPause(player1.java:172)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.Activity.performPause(Activity.java:5235)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1233)
09-10 19:41:45.250: E/AndroidRuntime(18428): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3050)
09-10 19:41:45.250: E/AndroidRuntime(18428): ... 12 more
答案 0 :(得分：7)
您需要AudioManager来管理音频焦点。以下是对其工作原理的简洁解释：http://developer.android.com/training/managing-audio/audio-focus.html。
以下是一个简单示例，说明如何在您的应用中实现它：http://developer.android.com/guide/topics/media/mediaplayer.html#audiofocus。
即使在任何给定时间只能运行一个活动，Android也是一个 多任务环境。这对此构成了特殊的挑战 使用音频的应用程序，因为只有一个音频输出 并且可能有几个媒体服务竞争其使用。之前 Android 2.2，没有内置机制来解决这个问题， 在某些情况下，这可能导致糟糕的用户体验。例如， 当用户正在听音乐而另一个应用需要时 通知用户非常重要的事情，用户可能听不到 由于嘈杂的音乐而产生的通知音。从Android开始 2.2，该平台为应用程序提供了一种协商使用设备音频输出的方法。这种机制称为音频焦点。
示例实施：
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int result = audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN);
if (result != AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
// could not get audio focus.
}
....
....
public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_GAIN:
// resume playback
if (mMediaPlayer == null) initMediaPlayer();
else if (!mMediaPlayer.isPlaying()) mMediaPlayer.start();
mMediaPlayer.setVolume(1.0f, 1.0f);
break;
case AudioManager.AUDIOFOCUS_LOSS:
// Lost focus for an unbounded amount of time: stop playback and release media player
if (mMediaPlayer.isPlaying()) mMediaPlayer.stop();
mMediaPlayer.release();
mMediaPlayer = null;
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
// Lost focus for a short time, but we have to stop
// playback. We don't release the media player because playback
// is likely to resume
if (mMediaPlayer.isPlaying()) mMediaPlayer.pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
// Lost focus for a short time, but it's ok to keep playing
// at an attenuated level
if (mMediaPlayer.isPlaying()) mMediaPlayer.setVolume(0.1f, 0.1f);
break;
}
}
答案 1 :(得分：3)
尝试将这些功能添加到您的活动中。
@Override
public void onPause()
{
super.onPause();
if (mp != null){
if(mp.isPlaying())
mp.pause();
}
}
@Override
public void onResume()
{
super.onResume();
if (mp != null){
if(!mp.isPlaying())
mp.prepare();
mp.start();
}
}
@Override
public void onStop()
{
super.onStop();
if (mp != null){
if(mp.isPlaying())
mp.pause();
}
}