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Ich möchte, dass die Kamera den Videorecorder startet, wenn ich zu dieser Recorderaktivität wechsel, anstatt sie auf einem Eventlistener zu starten. Aber wenn ich versuche, es oncreate zu starten, wird es einmal abstürzen, dann wird es wie erwartet funktionieren. Ich bekomme Fehler auf MediaRecorder.start() und auf myCamera.unlock. Wie kann ich das debuggen?Mediarecorder.start() wird nicht am oncreate arbeiten
package com.abacus.surveillance;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;
import java.io.IOException;
import android.app.Activity;
import android.content.Context;
import android.hardware.Camera;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.Toast;
import android.os.Handler;
public class RecordActivity extends AppCompatActivity {
private static Camera myCamera;
private MyCameraSurfaceView myCameraSurfaceView;
private MediaRecorder mediaRecorder;
Button myButton;
Button restore;
SurfaceHolder surfaceHolder;
boolean recording;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
recording = false;
setContentView(R.layout.activity_record);
//Get Camera for preview
myCamera = getCameraInstance();
if(myCamera == null){
Log.d("ON Create","Failed to get camera");
} else {
Log.d("ON Create","Got camera");
}
myCameraSurfaceView = new MyCameraSurfaceView(this, myCamera);
FrameLayout myCameraPreview = (FrameLayout)findViewById(R.id.videoview);
myCameraPreview.addView(myCameraSurfaceView);
myButton = (Button)findViewById(R.id.mybutton);
restore = (Button)findViewById(R.id.restorebtn);
myButton.setOnClickListener(myButtonOnClickListener);
restore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(RecordActivity.this, MainActivity.class));
}
});
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
startRecord();
}
}, 3000);
}
Button.OnClickListener myButtonOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View v) {
startRecord();
}
};
private void startRecord(){
if(recording){
try{
mediaRecorder.stop();
releaseMediaRecorder();
//finish();
myButton.setText("REC");
}catch(Exception e){
e.printStackTrace();
}
}else{
releaseCamera();
if(!prepareMediaRecorder()){
Toast.makeText(RecordActivity.this,
"Fail in prepareMediaRecorder()!\n - Ended -",
Toast.LENGTH_LONG).show();
finish();
}
mediaRecorder.start();
Log.d("start", "started");
recording = true;
myButton.setText("STOP");
}
}
private Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open();
Log.d("open", "open");
}
catch (Exception e){
Log.d("notopen", "notopen");
Log.e("camera", e.getMessage());
}
return c;
}
private boolean prepareMediaRecorder(){
Log.d("prep", "prepcamera");
myCamera = getCameraInstance();
mediaRecorder = new MediaRecorder();
myCamera.unlock();
//myCamera.setDisplayOrientation(90);
mediaRecorder.setCamera(myCamera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_480P));
mediaRecorder.setOutputFile("/sdcard/myvideo.mp4");
mediaRecorder.setMaxDuration(60000);
mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder().getSurface());
try {
mediaRecorder.prepare();
Log.d("prepare", "prepared");
//mediaRecorder.start();
} catch (IllegalStateException e) {
Log.d("fail", "failed");
e.printStackTrace();
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d("fail", "failed2");
e.printStackTrace();
releaseMediaRecorder();
return false;
}
return true;
}
@Override
protected void onPause() {
super.onPause();
releaseMediaRecorder();
releaseCamera();
}
private void releaseMediaRecorder(){
if (mediaRecorder != null) {
mediaRecorder.reset();
mediaRecorder.release();
mediaRecorder = null;
myCamera.lock();
}
}
private void releaseCamera(){
if (myCamera != null){
myCamera.release();
myCamera = null;
}
}
public class MyCameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{
private SurfaceHolder mHolder;
private Camera mCamera;
public MyCameraSurfaceView(Context context, Camera camera) {
super(context);
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int weight,
int height) {
if (mHolder.getSurface() == null){
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
Log.d("prevfail","fail");
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
}
Logcat
04-04 17:07:42.237 22448-22448/com.abacus.surveillance D/open: open
04-04 17:07:42.237 22448-22448/com.abacus.surveillance D/ON Create: Got camera
04-04 17:07:42.257 22448-22448/com.abacus.surveillance I/Choreographer: Skipped 42 frames! The application may be doing too much work on its main thread.
04-04 17:07:43.118 22448-22448/com.abacus.surveillance D/open: open
04-04 17:07:43.118 22448-22448/com.abacus.surveillance D/ON Create: Got camera
04-04 17:07:43.929 22448-22448/com.abacus.surveillance D/open: open
04-04 17:07:43.929 22448-22448/com.abacus.surveillance D/ON Create: Got camera
04-04 17:07:44.029 22448-22448/com.abacus.surveillance I/Choreographer: Skipped 96 frames! The application may be doing too much work on its main thread.
04-04 17:07:44.169 22448-22448/com.abacus.surveillance D/AndroidRuntime: Shutting down VM
04-04 17:07:44.169 22448-22448/com.abacus.surveillance W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x418ccda0)
04-04 17:07:44.199 22448-22448/com.abacus.surveillance E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.abacus.surveillance, PID: 22448
java.lang.RuntimeException: Method called after release()
at android.hardware.Camera.setPreviewDisplay(Native Method)
at android.hardware.Camera.setPreviewDisplay(Camera.java:530)
at com.abacus.surveillance.RecordActivity$MyCameraSurfaceView.surfaceCreated(RecordActivity.java:263)
at android.view.SurfaceView.updateWindow(SurfaceView.java:602)
at android.view.SurfaceView.access$000(SurfaceView.java:94)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:183)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:891)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2193)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1251)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6540)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:813)
at android.view.Choreographer.doCallbacks(Choreographer.java:613)
at android.view.Choreographer.doFrame(Choreographer.java:583)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:799)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5593)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Logcat 2
04-04 17:19:30.573 2479-2479/com.abacus.surveillance E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.abacus.surveillance, PID: 2479
java.lang.NullPointerException
at com.abacus.surveillance.RecordActivity.startRecord(RecordActivity.java:136)
at com.abacus.surveillance.RecordActivity.access$000(RecordActivity.java:40)
at com.abacus.surveillance.RecordActivity$2.run(RecordActivity.java:90)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5593)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Sie können Ihre Logcat für Vorspeisen veröffentlichen. So finden wir die Probleme im Code. –
Ausdruck von 2 logcats hinzugefügt – Eric