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비슷한 주제가 연결되어 있지만 광산을 해결할 수 없다는 것을 알고 있습니다. 어쨌든, 나는 일 때한 번만 전체 활동을 호출하는 "플래시"로 일부 전면 카메라를 만들려고합니다.Camera.release가 호출 된 후 카메라가 사용 중입니다. android
@SuppressWarnings("deprecation")
public class MainActivity extends AppCompatActivity {
private Camera mCamera = null;
private CameraPreview mCameraView = null;
private int cameraId = 0;
private void addView() {
if (!getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
Toast.makeText(this, "No camera on this device", Toast.LENGTH_LONG)
.show();
} else {
cameraId = findFrontFacingCamera();
if (cameraId < 0) {
Toast.makeText(this, "No front facing camera found.",
Toast.LENGTH_LONG).show();
} else {
try {
mCamera = Camera.open(cameraId);
} catch (Exception e) {
Log.d("ERROR", "Failed to get camera: " + e.getMessage());
}
}
}
if (mCamera != null) {
mCameraView = new CameraPreview(this, mCamera);//create a SurfaceView to show camera data
FrameLayout camera_view = (FrameLayout) findViewById(R.id.camera_view);
camera_view.addView(mCameraView);//add the SurfaceView to the layout
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
ImageButton imgCapture = (ImageButton) findViewById(R.id.imgCapture);
imgCapture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
WindowManager.LayoutParams layout = getWindow().getAttributes();
layout.screenBrightness = 1F;
getWindow().setAttributes(layout);
setContentView(R.layout.whitescreen);
new CountDownTimer(3000, 1000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
if (CameraPreview.safeToTakePicture) {
CameraPreview.safeToTakePicture = false;
mCamera.takePicture(null, null,
new PhotoHandler(getApplicationContext()));
}
setContentView(R.layout.activity_main);
addView();
}
}.start();
}
});
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
Log.d("Camera", "Camera found");
cameraId = i;
break;
}
}
return cameraId;
}
}
나는 비어있는 (흰색 레이아웃)에 레이아웃을 전환 캡처 버튼을 누르면 3 초 사진을 촬영 한 후 여기에, 다시 카메라 뷰를 추가 기다릴 내 CameraPreview 클래스입니다 : 그래서 여기 내 MainActivity입니다 onResume()가 호출 될 때
07-02 14:49:35.561 19017-19017/davidandguy.com.selfielightcamera E/AndroidRuntime: FATAL EXCEPTION: main
Process: davidandguy.com.selfielightcamera, PID: 19017
java.lang.RuntimeException: Camera is being used after Camera.release() was called
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1523)
at android.hardware.Camera.takePicture(Camera.java:1468)
at davidandguy.com.selfielightcamera.MainActivity$1$1.onFinish(MainActivity.java:65)
at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:127)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
심지어 : 사진을 찍을 때
@SuppressWarnings("deprecation")
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
public static boolean safeToTakePicture = false;
public CameraPreview(Context context, Camera camera) {
super(context);
mCamera = camera;
mCamera.setDisplayOrientation(90);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
Log.d("ERROR", "Camera error on surfaceCreated " + e.getMessage());
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
if (mHolder.getSurface() == null)
return;
try {
mCamera.stopPreview();
} catch (Exception e) {
Log.d("ERROR", "Trying the camera and it's not running");
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
safeToTakePicture = true;
} catch (IOException e) {
Log.d("ERROR", "Camera error on surfaceChanged " + e.getMessage());
}
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
mCamera.stopPreview();
mCamera.release();
}
}
나는 예를 들어, 오류 Camera is being used after Camera.release was called에게 시간을 많이 얻을 예를 들어 활동을 최소화 한 다음 다시 실행하십시오. 나는 어딘가에 onPause()과 onResume()을 넣어야한다는 것을 알고 있지만 어디서/어떻게 구현해야하는지 모르겠습니다. 덕분에