我正在制作一个有声音游戏的测验应用程序。但是我发现即使关闭应用程序，声音仍在播放。我有两次使用mediaplayer。
1.点击图像按钮。
2.关于变化的问题。
问题每15秒更改一次，并且在杀死应用程序声音后每15秒播放一次。
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mediaPlayer.start();
}
});
btnA.setOnClickListener(this);
btnB.setOnClickListener(this);
btnC.setOnClickListener(this);
btnD.setOnClickListener(this);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
}
@Override
protected void onResume()
{
super.onResume();
questionPlay = db.getMorseQuestionMode(mode);
totalQuestion = questionPlay.size();
mCountDown = new CountDownTimer(TIMEOUT, INTERVAL) {
@Override
public void onTick(long millisUntilFinished) {
progressBar.setProgress(progressValue);
progressValue++;
}
@Override
public void onFinish() {
mCountDown.cancel();
showQuestion(++index);
}
};
showQuestion(index);
}
private void showQuestion(int index) {
if (index < totalQuestion) {
thisQuestion++;
txtQuestion.setText(String.format("%d/%d", thisQuestion, totalQuestion));
progressBar.setProgress(0);
progressValue = 0;
int QusId = this.getResources().getIdentifier(questionPlay.get(index).getQus().toString(), "raw", getPackageName());
btnA.setText(questionPlay.get(index).getAnswerA());
btnB.setText(questionPlay.get(index).getAnswerB());
btnC.setText(questionPlay.get(index).getAnswerC());
btnD.setText(questionPlay.get(index).getAnswerD());
mCountDown.start();
mediaPlayer= MediaPlayer.create(this,QusId);
mediaPlayer.start();
} else {
Intent intent = new Intent(this, Done.class);
Bundle dataSend = new Bundle();
dataSend.putInt("SCORE", score);
dataSend.putInt("TOTAL", totalQuestion);
dataSend.putInt("CORRECT", correctAnswer);
intent.putExtras(dataSend);
startActivity(intent);
finish();
}
}
@Override
public void onClick(View v) {
mCountDown.cancel();
if (index < totalQuestion) {
Button clickedButton = (Button) v;
if (clickedButton.getText().equals(questionPlay.get(index).getCorrectAnswer())) {
score += 10; // increase score
correctAnswer++; //increase correct answer
showQuestion(++index);
} else {
vibrator.vibrate(50);
showQuestion(++index); // If choose right , just go to next question
}
txtScore.setText(String.format("%d", score));
}
}
//CLicking back Button
public void onBackPressed() {
showExitAlertBox();
}
public void showExitAlertBox() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.setMessage("You want to quit the play?");
//Yes Quit then go to category page
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int button) {
Intent intent = new Intent(getApplicationContext(), CategorySecond.class);
startActivity(intent);
}
});
//no Quit stay on same page
alertDialog.setNegativeButton("NO", null);
alertDialog.show();
mediaPlayer.stop();
}
}
在下面显示我们时出错
W/MediaPlayer-JNI: MediaPlayer finalized without being released
最佳答案
如果在onStop中播放，请取消计时器并停止Mediaplayer
@Override
public void onStop() {
if (mediaPlayer.isPlaying())
mediaPlayer.stop();
if(mCountDown != null)
mCountDown.cancel();
super.onStop();
}
关于android - 即使应用被杀死，声音仍会继续播放，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42359698/