所以我正在尝试制作一个简单的应用程序，只要触摸并按住图像按钮，它就会录制音频。这是代码:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//PREPARE MEDIA RECORDER
final MediaRecorder recorder = new MediaRecorder();
recorder.reset();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/easyvoicenotepad/test.mp3");
//PREPARE
try {
recorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//IMAGE BUTTON
final ImageButton recBtn = (ImageButton) findViewById(R.id.recButton);
recBtn.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN ) {
recBtn.setImageResource(R.drawable.record_btn_pressed);
recorder.start();
}
else if(event.getAction() == MotionEvent.ACTION_UP) {
recBtn.setImageResource(R.drawable.record_btn);
recorder.stop();
recorder.release();
}
return false;
}
});
}
编辑的 Logcat 文件:
07-30 13:53:09.423: E/MediaRecorder(10586): start called in an invalid state: 4
07-30 13:53:09.423: E/InputEventReceiver(10586): Exception dispatching input event.
07-30 13:53:09.423: E/MessageQueue-JNI(10586): Exception in MessageQueue callback: handleReceiveCallback
07-30 13:53:09.431: E/MessageQueue-JNI(10586): java.lang.IllegalStateException
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.media.MediaRecorder.start(Native Method)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.whizzappseasyvoicenotepad.MainActivity$1.onTouch(MainActivity.java:48)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.View.dispatchTouchEvent(View.java:7379)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1966)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1418)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.app.Activity.dispatchTouchEvent(Activity.java:2424)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.View.dispatchPointerEvent(View.java:7564)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.os.MessageQueue.nativePollOnce(Native Method)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.os.MessageQueue.next(MessageQueue.java:132)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.os.Looper.loop(Looper.java:124)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at android.app.ActivityThread.main(ActivityThread.java:5103)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at java.lang.reflect.Method.invoke(Method.java:525)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-30 13:53:09.431: E/MessageQueue-JNI(10586): at dalvik.system.NativeStart.main(Native Method)
07-30 13:53:09.438: E/AndroidRuntime(10586): FATAL EXCEPTION: main
07-30 13:53:09.438: E/AndroidRuntime(10586): java.lang.IllegalStateException
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.media.MediaRecorder.start(Native Method)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.whizzappseasyvoicenotepad.MainActivity$1.onTouch(MainActivity.java:48)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.View.dispatchTouchEvent(View.java:7379)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2209)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1910)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1966)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1418)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.app.Activity.dispatchTouchEvent(Activity.java:2424)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.View.dispatchPointerEvent(View.java:7564)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.os.MessageQueue.nativePollOnce(Native Method)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.os.MessageQueue.next(MessageQueue.java:132)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.os.Looper.loop(Looper.java:124)
07-30 13:53:09.438: E/AndroidRuntime(10586): at android.app.ActivityThread.main(ActivityThread.java:5103)
07-30 13:53:09.438: E/AndroidRuntime(10586): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 13:53:09.438: E/AndroidRuntime(10586): at java.lang.reflect.Method.invoke(Method.java:525)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-30 13:53:09.438: E/AndroidRuntime(10586): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-30 13:53:09.438: E/AndroidRuntime(10586): at dalvik.system.NativeStart.main(Native Method)
问题是，在我添加录音机功能后，应用程序在编译后立即崩溃。
我设置了权限，现在只要我触摸 ImageButton，我的应用程序就会崩溃
最佳答案
在 AndroidManifest.xml 中添加 permission
<uses-permission android:name="android.permission.RECORD_AUDIO" />
关于java - 尝试录制音频时应用程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17945733/