我使用MediaPlayer来播放声音，这是我的代码:
// Define CountDown Timer Attributes//
waitTimer1 = new CountDownTimer(60000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
long timeLeft = millisUntilFinished / 1000;
Timer.setText("" + String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished),
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
if (timeLeft >= 43) {
mp = MediaPlayer.create(getApplicationContext(), R.raw.beeb1);
mp.start();
}
}
一旦计时器达到43秒，
MediaPlayer就会像预期的那样停止。在我这样调用
MediaPlayer release()之后:(
Button每次被按下，所以我知道它已经被释放了 case R.id.Team1:
Category.team_one++;
number1.setText(String.valueOf(Category.team_one));
t1.setEnabled(false);
t2.setEnabled(false);
next.setEnabled(true);
Timer.setText("1:00");
mp.release();
break;
问题是两次播放相同的声音后，它完全停止播放。不知道为什么。
MediaPlayer仅在计时器第一次启动时播放声音。第二次达到45秒，然后停止工作。第三次，依此类推，它根本不会发出声音。请帮忙，谢谢!这是所有代码:
// Declare TextView Variable Number One//
protected TextView number1;
// Declare TextView Variable Number Two//
protected TextView number2;
// Declare TextView Variable Timer//
protected TextView Timer;
// Declare TextView Variable Word//
protected TextView word;
// Declare Button Variable Next//
protected Button next;
// Declare CountDown Timer Variable//
private CountDownTimer waitTimer1;
// Declare Button Variable Team One//
protected Button t1;
// Declare Button Variable Team Two//
protected Button t2;
// Declare Media_Player Variable MP//
MediaPlayer mp;
// Where List Starts//
int stringListCounter;
// Shuffle List//
@Override
public void onResume() {
super.onResume();
stringListCounter = randInt(0, 100);
}
// Shuffle List
private int randInt(int min, int max) {
Random rand = new Random();
int randomNum = rand.nextInt((max - min) + 1) + min;
return randomNum;
}
// What Happens When Activity Starts//
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_animals);
// Link Button Team One to Activity_Animals//
t1 = (Button) findViewById(R.id.Team1);
t1.setEnabled(false);
t1.setOnClickListener(this);
// Link Button Number One to Activity_Animals//
number1 = (TextView) findViewById(R.id.Number1);
number1.setText(String.valueOf(Category.team_one));
// Link Button Number Two to Activity_Animals//
number2 = (TextView) findViewById(R.id.Number2);
number2.setText(String.valueOf(Category.team_two));
// Link Button Team Two to Activity_Animals//
t2 = (Button) findViewById(R.id.Team2);
t2.setEnabled(false);
t2.setOnClickListener(this);
// Link TextView Timer to Activity_Animals//
Timer = (TextView) findViewById(R.id.Timer);
// Link Button Next to Activity_Animals//
next = (Button) findViewById(R.id.Next);
next.setOnClickListener(this);
// Link TextView Word to Activity_Animals//
word = (TextView) findViewById(R.id.Word);
}
// What Happens When Said Variable Is Clicked//
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.Next:
t1.setEnabled(false);
t2.setEnabled(false);
next.setText("next");
if (waitTimer1 == null) {
// Define CountDown Timer Attributes//
waitTimer1 = new CountDownTimer(60000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
long timeLeft = millisUntilFinished / 1000;
Timer.setText("" + String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished),
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
if (timeLeft >= 43) {
mp = MediaPlayer.create(getApplicationContext(), R.raw.beeb1);
mp.start();
}
}
@Override
public void onFinish() {
t1.setEnabled(true);
next.setEnabled(false);
waitTimer1 = null;
Timer.setText("0:00");
next.setText("Start");
}
}.start();
// Repeat Words//
if (word.getText().toString().equals("Big Foot")) {
stringListCounter = 0;
}
// Change To Next Word//
stringListCounter++;
word.setText(stringIdList[stringListCounter]);
} else{
// Repeat Words//
if (word.getText().toString().equals("Big Foot")) {
stringListCounter = 0;
}
// Change To Next Word//
stringListCounter++;
word.setText(stringIdList[stringListCounter]);
}
break;
case R.id.Team1:
Category.team_one++;
number1.setText(String.valueOf(Category.team_one));
t1.setEnabled(false);
t2.setEnabled(false);
next.setEnabled(true);
Timer.setText("1:00");
mp.stop();
mp.reset();
mp.release();
break;
case R.id.Team2:
Category.team_two++;
number2.setText(String.valueOf(Category.team_two));
t1.setEnabled(false);
t2.setEnabled(false);
next.setEnabled(true);
Timer.setText("1:00");
mp.release();
mp = null;
break;
}
}
}
最佳答案
问题出在以下代码中:
@Override
public void onTick(long millisUntilFinished) {
long timeLeft = millisUntilFinished / 1000;
Timer.setText("" + String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished),
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
if (timeLeft >= 43) {
mp = MediaPlayer.create(getApplicationContext(), R.raw.beeb1);
mp.start();
}
}
现在，在每个“滴答声”(1000毫秒)上，它都将创建一个新的
MediaPlayer并启动它，直到倒数计数小于43，这意味着您正在启动17个MediaPlayer s-除了最后一个之外，不会释放它们。因此，您可能会导致MediaPlayer出现内存问题由于您使用的是重复声音，因此您只需在
MediaPlayer中创建onCreate，然后在每个刻度上重置/重播它即可。您不需要重新创建/发行/等。
关于android - 多次使用后Media Player停止工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27976788/