收到电话时，MediaPlayer不会暂停。任何我可以添加任何代码来修复此问题的人。如果有人能提供帮助就会很棒！只有初学者 我在下面的回答中添加了停止它可以工作但是如果我尝试回到操作栏中的后退按钮或后退按钮转到应用程序的主菜单，它只是崩溃。
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();
}
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();
}
@Override
protected void onStop() {
super.onStop();
if (mp != null && mp.isPlaying()){
mp.pause();
}
}
}
错误
09-12 14:52:49.755: E/AndroidRuntime(26104): FATAL EXCEPTION: main
09-12 14:52:49.755: E/AndroidRuntime(26104): java.lang.RuntimeException: Unable to stop activity {com.apps.seconds/com.apps.seconds.player1}: java.lang.IllegalStateException
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3463)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3517)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread.access$1200(ActivityThread.java:141)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1309)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.os.Handler.dispatchMessage(Handler.java:99)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.os.Looper.loop(Looper.java:137)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-12 14:52:49.755: E/AndroidRuntime(26104): at java.lang.reflect.Method.invokeNative(Native Method)
09-12 14:52:49.755: E/AndroidRuntime(26104): at java.lang.reflect.Method.invoke(Method.java:525)
09-12 14:52:49.755: E/AndroidRuntime(26104): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-12 14:52:49.755: E/AndroidRuntime(26104): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-12 14:52:49.755: E/AndroidRuntime(26104): at dalvik.system.NativeStart.main(Native Method)
09-12 14:52:49.755: E/AndroidRuntime(26104): Caused by: java.lang.IllegalStateException
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.media.MediaPlayer.isPlaying(Native Method)
09-12 14:52:49.755: E/AndroidRuntime(26104): at com.apps.seconds.player1.onStop(player1.java:154)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1212)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.Activity.performStop(Activity.java:5275)
09-12 14:52:49.755: E/AndroidRuntime(26104): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3458)
09-12 14:52:49.755: E/AndroidRuntime(26104): ... 11 more
答案 0 :(得分：2)
当收到电话时，您的活动会在后台进行，并会在onStop()中收到回电。
因此，onStop()应该执行与onBackPressed()类似的操作。
@Override
protected void onStop() {
super.onStop();
if (mp != null && mp.isPlaying()){
mp.pause();
}
}