Java 我的android应用程序崩溃，触摸按钮无法正常工作

我正在开发一个可以录制和播放音频的应用程序。我用一个触摸按钮来录音。长时间触摸可以成功录制音频，但如果我没有用手指按住按钮超过一秒钟，我的应用程序就会崩溃

    mRecordBtn.setOnTouchListener(new View.OnTouchListener(){
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
                startRecording();
                mRecordLabel.setText("Recording...");
            }
            else if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
                stopRecording();
                mRecordLabel.setText("Recording stopped");
            }
            return false;
        }
    });

    private void startRecording() {
        recorder = new MediaRecorder();
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setOutputFile(fileName);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

        try {
            recorder.prepare();
        } catch (IOException e) {
            Log.e(LOG_TAG, "prepare() failed");
        }
        recorder.start();
    }

    private void stopRecording() {
        recorder.stop();
        recorder.release();
        recorder = null;
    }

长时间触摸时的Logcat（无错误）：

轻敲时的Logcat：

    D/ViewRootImpl@d597feb[MainActivity]: ViewPostIme pointer 0
    I/MediaRecorderJNI: setup
    I/MediaRecorderJNI: setAudioSource(1)
    I/MediaRecorderJNI: setAudioEncoder(3)
    I/MediaRecorderJNI: setOutputFile
    I/MediaRecorderJNI: prepare
    I/MediaRecorderJNI: start
    D/ViewRootImpl@d597feb[MainActivity]: ViewPostIme pointer 1
    I/MediaRecorderJNI: stop
    E/MediaRecorder: stop failed: -1007
    E/InputEventReceiver: Exception dispatching input event.
    E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallback
    E/MessageQueue-JNI: java.lang.RuntimeException: stop failed.
        at android.media.MediaRecorder._stop(Native Method)
        at android.media.MediaRecorder.stop(MediaRecorder.java:1340)
        at tk.gandriks.gaaudiotransform.MainActivity.stopRecording(MainActivity.java:162)
        at tk.gandriks.gaaudiotransform.MainActivity.access$200(MainActivity.java:34)
        at tk.gandriks.gaaudiotransform.MainActivity$1.onTouch(MainActivity.java:78)
        at android.view.View.dispatchTouchEvent(View.java:12536)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:601)
        at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1871)
        at android.app.Activity.dispatchTouchEvent(Activity.java:3384)
        at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:68)
        at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:563)
        at android.view.View.dispatchPointerEvent(View.java:12788)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5670)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5465)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5114)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5171)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7736)
        at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7676)
        at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7637)
        at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7847)
        at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:197)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:325)
        at android.os.Looper.loop(Looper.java:142)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
    D/AndroidRuntime: Shutting down VM
    E/AndroidRuntime: FATAL EXCEPTION: main
    Process: tk.gandriks.gaaudiotransform, PID: 20802
    java.lang.RuntimeException: stop failed.
        at android.media.MediaRecorder._stop(Native Method)
        at android.media.MediaRecorder.stop(MediaRecorder.java:1340)
        at tk.gandriks.gaaudiotransform.MainActivity.stopRecording(MainActivity.java:162)
        at tk.gandriks.gaaudiotransform.MainActivity.access$200(MainActivity.java:34)
        at tk.gandriks.gaaudiotransform.MainActivity$1.onTouch(MainActivity.java:78)
        at android.view.View.dispatchTouchEvent(View.java:12536)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
        at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:601)
        at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1871)
        at android.app.Activity.dispatchTouchEvent(Activity.java:3384)
        at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:68)
        at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:563)
        at android.view.View.dispatchPointerEvent(View.java:12788)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5670)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5465)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5114)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5171)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
        at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7736)
        at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7676)
        at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7637)
        at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7847)
        at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:197)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:325)
        at android.os.Looper.loop(Looper.java:142)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
    I/zygote64: Do partial code cache collection, code=29KB, data=20KB
    After code cache collection, code=28KB, data=20KB
    Increasing code cache capacity to 128KB
    I/MediaRecorderJNI: finalize
    release
    Application terminated.

---

停止录制过程时，我可以看出有问题，但我似乎无法自行修复…

准备需要一些时间才能执行，因此，当点击时，您试图停止录制，但不确定它是否已启动，您可以使用变量

isStart

来检查或用try catch环绕停止点

解决方案1

 private void startRecording() {
    recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    recorder.setOutputFile(fileName);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

    try {
        recorder.prepare();
    } catch (IOException e) {
        Log.e(LOG_TAG, "prepare() failed");
    }

    recorder.start();
    isStarted = true;
}

private void stopRecording() {
  if(isStarted) {
    recorder.stop();
    recorder.release();
    recorder = null;
    isStarted = false;
  }
}

解决方案2

private void stopRecording() {
  try {
      recorder.stop();
      recorder.release();
      recorder = null;
  } catch(Exception e) {}
}

---

这很奇怪。错误堆栈跟踪中提到的这行代码是什么@格雷格诺我不太明白你的意思。你是指整个logcat吗？在第162行@gregI，假设这是Java文件的第162行，那么这就是stopRecording方法的“recorder.stop（）；”行。我会用try-catch将“recorder.stop（）”包围起来，并显式输出捕获的RuntimeException；我倾向于在快速点击中，记录器对象未正确初始化或使用。。。尝试停止会导致异常。我尝试了代码，尝试将布尔值设置为默认值“false”和“true”，但没有任何更改。应用程序仍然像以前一样工作，仍然在点击时崩溃。解决方案2工作！！！！！！！我已经为此失去了一周的睡眠。。。我永远感激你，伙计

private void stopRecording() {
  try {
      recorder.stop();
      recorder.release();
      recorder = null;
  } catch(Exception e) {}
}