我正在尝试在 android(2.3.3) 上开发相机应用程序。使用 eclipse 和 android 模拟器（所以没有设备）。我的应用程序有两个功能：拍照和捕捉视频。一键切换模式。第一个工作正常，但视频有问题。
第一个错误是：“setOutputFormat 在无效状态下调用：4”。在尝试设置 MediaRecorder 的输出格式时。如果我忽略这一点（将其设为注释行），那么我会收到“媒体服务器死机，相机服务器死机”错误（错误 100）
我是一个新的 android 开发人员，所以我只是在使用本教程：http: //developer.android.com/guide/topics/media/camera.html
这些错误的原因可能是我试图在没有设备的情况下进行测试吗？
这是清单许可：
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.RECORD_VIDEO"/>
这是发生这些错误的代码：
private boolean prepareVideoRecorder() {
mMediaRecorder = new MediaRecorder();
mMediaRecorder.reset();
// Unlock and set camera to MediaRecorder
mCamera.unlock();
mMediaRecorder.setCamera(mCamera);
// Set sources
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Set output format and encoding
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
// Set a CamcorderProfile (requires API Level 8 or higher)
mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
// Set output file
mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
// Set the preview output
mMediaRecorder.setPreviewDisplay(mPreview.getmHolder().getSurface());
// Prepare configured MediaRecorder
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
}
return true;
}
private void videoRecording() {
if (isRecording) {
// stop recording and release camera
mMediaRecorder.stop(); // stop the recording
releaseMediaRecorder(); // release the MediaRecorder object
mCamera.lock(); // take camera access back from MediaRecorder
// inform the user that recording has stopped
captureButton.setText(R.string.capture);
isRecording = false;
} else {
// initialize video camera
if (prepareVideoRecorder()) {
// Camera is available and unlocked, MediaRecorder is prepared,
// now you can start recording
mMediaRecorder.start();
captureButton.setText(R.string.stop);
isRecording = true;
} else {
// prepare didn't work, release the camera
releaseMediaRecorder();
}
}
}
这是 logcat 输出：
06-21 16:27:24.034: E/MediaRecorder(329): setOutputFormat called in an invalid state: 4
06-21 16:27:24.034: D/AndroidRuntime(329): Shutting down VM
06-21 16:27:24.054: W/dalvikvm(329): threadid=1: thread exiting with uncaught exception (group=0x40015560)
06-21 16:27:24.054: E/AndroidRuntime(329): FATAL EXCEPTION: main
06-21 16:27:24.054: E/AndroidRuntime(329): java.lang.IllegalStateException
06-21 16:27:24.054: E/AndroidRuntime(329): at android.media.MediaRecorder.setOutputFormat(Native Method)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.media.MediaRecorder.setProfile(MediaRecorder.java:286)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.bor.Fotograf.AndroidFotoActivity.prepareVideoRecorder(AndroidFotoActivity.java:221)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.bor.Fotograf.AndroidFotoActivity.videoRecording(AndroidFotoActivity.java:257)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.bor.Fotograf.AndroidFotoActivity.access$9(AndroidFotoActivity.java:245)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.bor.Fotograf.AndroidFotoActivity$6.onClick(AndroidFotoActivity.java:107)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.view.View.performClick(View.java:2485)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.view.View$PerformClick.run(View.java:9080)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.os.Handler.handleCallback(Handler.java:587)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.os.Handler.dispatchMessage(Handler.java:92)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.os.Looper.loop(Looper.java:123)
06-21 16:27:24.054: E/AndroidRuntime(329): at android.app.ActivityThread.main(ActivityThread.java:3683)
06-21 16:27:24.054: E/AndroidRuntime(329): at java.lang.reflect.Method.invokeNative(Native Method)
06-21 16:27:24.054: E/AndroidRuntime(329): at java.lang.reflect.Method.invoke(Method.java:507)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
06-21 16:27:24.054: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
06-21 16:27:24.054: E/AndroidRuntime(329): at dalvik.system.NativeStart.main(Native Method)