我试着创建一个应用程序,让我在SurfaceView中看到我用前摄像头看到的东西。我试图实现一个按钮,让我采取的活动截图,因为在相机我有一个面具。当我执行屏幕截图时,我只能捕获我的面具的屏幕截图,它位于surfaceView的上方。
我不知道我做错了什么。
有人能帮我吗?
我的目的是创建一个应用程序,让我可以在我的脸上戴着面具拍一张自己的照片。
她就是我虚拟设备的例子。
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback, Handler.Callback {
static final String TAG = "CamTest";
static final int MY_PERMISSIONS_REQUEST_CAMERA = 1242;
private static final int MSG_CAMERA_OPENED = 1;
private static final int MSG_SURFACE_READY = 2;
private final Handler mHandler = new Handler(this);
SurfaceView mSurfaceView;
SurfaceHolder mSurfaceHolder;
CameraManager mCameraManager;
String[] mCameraIDsList;
CameraDevice.StateCallback mCameraStateCB;
CameraDevice mCameraDevice;
CameraCaptureSession mCaptureSession;
boolean mSurfaceCreated = true;
boolean mIsCameraConfigured = false;
private Surface mCameraSurface = null;
Button btt_scatta;
Bitmap immagine_screen;
ImageView img_view_screen;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Richiedo il Fullscreen
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
//Get root view from Activity
final View rootView = getWindow().getDecorView().findViewById(android.R.id.content);
btt_scatta = (Button) findViewById(R.id.btt_scatta);
img_view_screen = (ImageView) findViewById(R.id.img_view_screen);
img_view_screen.setVisibility(View.GONE);
this.mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
this.mSurfaceHolder = this.mSurfaceView.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mCameraManager = (CameraManager) this.getSystemService(Context.CAMERA_SERVICE);
try {
mCameraIDsList = this.mCameraManager.getCameraIdList();
for (String id : mCameraIDsList) {
Log.v(TAG, "CameraID: " + id);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
mCameraStateCB = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onOpened", Toast.LENGTH_SHORT).show();
mCameraDevice = camera;
mHandler.sendEmptyMessage(MSG_CAMERA_OPENED);
}
@Override
public void onDisconnected(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onDisconnected", Toast.LENGTH_SHORT).show();
}
@Override
public void onError(CameraDevice camera, int error) {
Toast.makeText(getApplicationContext(), "onError", Toast.LENGTH_SHORT).show();
}
};
btt_scatta.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
btt_scatta.setVisibility(View.GONE);
immagine_screen = getScreenShot(rootView);
store(immagine_screen,"screenshot Honor");
img_view_screen.setVisibility(View.VISIBLE);
img_view_screen.setImageBitmap(immagine_screen);
}
});
}
@Override
protected void onStart() {
super.onStart();
//requesting permission
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, MY_PERMISSIONS_REQUEST_CAMERA);
Toast.makeText(getApplicationContext(), "request permission", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "PERMISSION_ALREADY_GRANTED", Toast.LENGTH_SHORT).show();
try {
mCameraManager.openCamera(mCameraIDsList[1], mCameraStateCB, new Handler());
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
}
@Override
protected void onStop() {
super.onStop();
try {
if (mCaptureSession != null) {
mCaptureSession.stopRepeating();
mCaptureSession.close();
mCaptureSession = null;
}
mIsCameraConfigured = false;
} catch (final CameraAccessException e) {
// Doesn't matter, cloising device anyway
e.printStackTrace();
} catch (final IllegalStateException e2) {
// Doesn't matter, cloising device anyway
e2.printStackTrace();
} finally {
if (mCameraDevice != null) {
mCameraDevice.close();
mCameraDevice = null;
mCaptureSession = null;
}
}
}
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MSG_CAMERA_OPENED:
case MSG_SURFACE_READY:
// if both surface is created and camera device is opened
// - ready to set up preview and other things
if (mSurfaceCreated && (mCameraDevice != null)
&& !mIsCameraConfigured) {
configureCamera();
}
break;
}
return true;
}
private void configureCamera() {
// prepare list of surfaces to be used in capture requests
List<Surface> sfl = new ArrayList<Surface>();
sfl.add(mCameraSurface); // surface for viewfinder preview
// configure camera with all the surfaces to be ever used
try {
mCameraDevice.createCaptureSession(sfl,
new CaptureSessionListener(), null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
mIsCameraConfigured = true;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_CAMERA:
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED)
try {
mCameraManager.openCamera(mCameraIDsList[1], mCameraStateCB, new Handler());
} catch (CameraAccessException e) {
e.printStackTrace();
}
break;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
mCameraSurface = holder.getSurface();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
mCameraSurface = holder.getSurface();
mSurfaceCreated = true;
mHandler.sendEmptyMessage(MSG_SURFACE_READY);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mSurfaceCreated = false;
}
private class CaptureSessionListener extends
CameraCaptureSession.StateCallback {
@Override
public void onConfigureFailed(final CameraCaptureSession session) {
Log.d(TAG, "CaptureSessionConfigure failed");
}
@Override
public void onConfigured(final CameraCaptureSession session) {
Log.d(TAG, "CaptureSessionConfigure onConfigured");
mCaptureSession = session;
try {
CaptureRequest.Builder previewRequestBuilder = mCameraDevice
.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
previewRequestBuilder.addTarget(mCameraSurface);
mCaptureSession.setRepeatingRequest(previewRequestBuilder.build(),
null, null);
} catch (CameraAccessException e) {
Log.d(TAG, "setting up preview failed");
e.printStackTrace();
}
}
}
//Capture the root view
public static Bitmap getScreenShot(View view) {
View screenView = view.getRootView();
screenView.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(screenView.getDrawingCache());
screenView.setDrawingCacheEnabled(false);
return bitmap;
}
//Store the Bitmap into the phone
public static void store(Bitmap bm, String fileName){
final String dirPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Screenshots";
File dir = new File(dirPath);
if(!dir.exists())
dir.mkdirs();
File file = new File(dirPath, fileName);
try {
FileOutputStream fOut = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();
} catch (Exception e) {
e.printStackTrace();
}
}
我认为一个好的解决办法是用相机拍一张照片,然后在我的面具下放进一个图像视图,然后拍一张截图。但问题是和surfaceView合影:我不知道该怎么做。
