Mam kartę Samsung Galaxy, która działała na Android 2.2. Opracowałem prosty program do oddzielnego nagrywania audio i wideo. To działało dobrze na mojej karcie galaktyk. Ale wszystko zmieniło się po aktualizacji do wersji 2.3.3. Mój kod przestał działać od tego momentu. Tu jest mój kod, który pokazuje ten nieoczekiwany (dla mnie :)) zachowania:MediaRecorder - kod przestał działać po aktualizacji oprogramowania układowego
// import statements
public class CameraPreview extends Activity implements SurfaceHolder.Callback {
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean previewing = false;
LayoutInflater controlInflater = null;
Button recordButton;
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView) findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
controlInflater = LayoutInflater.from(getBaseContext());
View viewControl = controlInflater.inflate(R.layout.control, null);
LayoutParams layoutParamsControl = new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
this.addContentView(viewControl, layoutParamsControl);
recordButton = (Button)viewControl.findViewById(R.id.start_recording);
recordButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startRecording();
}
});
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (previewing) {
camera.stopPreview();
previewing = false;
}
if (camera != null) {
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
}
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
private void startRecording() {
try {
stopPreview();
Thread video = new Thread(new Runnable() {
public void run() {
videoRecorder = new MediaRecorder();
videoRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
videoRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
videoRecorder.setOutputFormat(2);
videoRecorder.setVideoEncodingBitRate(56 * 8 * 1024);
videoRecorder.setVideoSize(176, 144);
videoRecorder.setVideoFrameRate(12);
videoRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
videoRecorder.setOutputFile("/sdcard/video.m4e");
try {
videoRecorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
videoRecorder.start();
}
});
video.start();
Thread audio = new Thread(new Runnable() {
public void run() {
audioRecorder = new MediaRecorder();
audioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
audioRecorder.setOutputFile("/sdcard/audio.amr");
try {
audioRecorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
audioRecorder.start();
}
});
audio.start();
} catch (Exception e) {
Log.e("streamer", "Unable to start recording", e);
}
}
private void stopPreview() {
if (camera == null) {
throw new RuntimeException();
}
camera.stopPreview();
camera.release();
camera = null;
}
}
Poniżej znajduje się wyjście dziennika:
PID TAG MESSAGE
D 75 CameraHardwareSec MemoryHeapBase(fd(27), size(5760128), width(800), height(600))
E 75 AuthorDriver Command 13 completed with error -17
E 7169 MediaRecorder prepare failed: -17
W 7169 System.err java.io.IOException: prepare failed.
W 7169 System.err at android.media.MediaRecorder._prepare(Native Method)
W 7169 System.err at android.media.MediaRecorder.prepare(MediaRecorder.java:592)
W 7169 System.err at com.video.streamer.view.CameraPreview$2.run(CameraPreview.java:121)
W 7169 System.err at java.lang.Thread.run(Thread.java:1019)
E 7169 MediaRecorder start called in an invalid state: 0
W 7169 dalvikvm threadid=10: thread exiting with uncaught exception (group=0x40015578)
E 7169 AndroidRuntime FATAL EXCEPTION: Thread-11
E 7169 AndroidRuntime java.lang.IllegalStateException
E 7169 AndroidRuntime at android.media.MediaRecorder.start(Native Method)
E 7169 AndroidRuntime at com.video.streamer.view.CameraPreview$2.run(CameraPreview.java:127)
E 7169 AndroidRuntime at java.lang.Thread.run(Thread.java:1019)
W 118 ActivityManager Force finishing activity com.video.streamer.view/.CameraPreview
Poniżej moje pliki XML wykorzystywanych do celów układu. camera.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<SurfaceView
android:id="@+id/camerapreview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
control.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="bottom"
>
<Button
android:id="@+id/start_recording"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" * Start Recording"
android:layout_gravity="right"
android:layout_margin="10px"
/>
</LinearLayout>
użyłem następujące uprawnienia AndroidManifest.xml
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
nagranie wideo przykład dostałem od roman10 facetów blogu: Android Video Recording API–Illustrated with an Example również pracę dobrze z moim Android 2.2. Ale to również przestało działać w wyniku mojej aktualizacji.
Czy jest coś czego brakuje mi podczas nagrywania wideo z systemem Android 2.3.3. Jak mogę rozwiązać ten problem?
Mam ten sam problem. – lukewm