接到电话时，MediaPlayer 不会暂停。我可以添加任何代码来解决此问题的任何人。如果有人可以提供帮助，那就太好了！只有初学者我在下面的答案中添加了 on Stop 它可以工作，但是如果我尝试使用操作栏中的后退按钮或后退按钮返回到应用程序的主菜单，它就会崩溃。
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