切换到前置摄像头和后置摄像头Android SurfaceView [英] Switch To Front Camera and Back Camera Android SurfaceView
本文介绍了切换到前置摄像头和后置摄像头Android SurfaceView的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想使用开关相机功能。目前我已经开发了一个相机对象工作精细的后置摄像头,但不工作的前置摄像头。我没有找到一个解决方案,在前面和后面的摄像头之间切换。这是我的代码..
public class MyCamera extends Activity implements SurfaceHolder.Callback,
Camera.ShutterCallback,Camera .PictureCallback {
Camera mCamera;
SurfaceView mPreview;
String filePath;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_preview);
mPreview =(SurfaceView)findViewById(R.id.preview);
mPreview.getHolder()。addCallback(this);
mPreview.getHolder()。setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open();
}
@Override
public void onPause(){
super.onPause();
mCamera.stopPreview();
}
@Override
public void onDestroy(){
super.onDestroy();
mCamera.release();
Log.d(CAMERA,Destroy);
}
public void onCancelClick(View v){
finish();
}
public void onSnapClick(View v){
mCamera.takePicture(this,null,null,this);
}
@Override
public void onShutter(){
Toast.makeText(this,Click!,Toast.LENGTH_SHORT).show();
}
@Override
public void onPictureTaken(byte [] data,Camera camera){
FileOutputStream fos = null;
try {
filePath =/sdcard/test.jpg;
fos = new FileOutputStream(filePath);
fos.write(data);
fos.close();
// Log.d(Log,onPictureTaken - written bytes:+ data.length);
} catch(FileNotFoundException e){
e.printStackTrace();
Log.d(Log,onPictureTaken - written bytes:+ data.length);
} catch(IOException e){
e.printStackTrace();
Log.d(Log,onPictureTaken - written bytes:+ data.length);
} finally {
Intent i = getIntent();
i.putExtra(Path,filePath);
setResult(RESULT_OK,i);
finish();
}
camera.startPreview();
}
@Override
public void surfaceChanged(SurfaceHolder holder,int format,int width,
int height){
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_FRONT,info);
int rotation = this.getWindowManager()。getDefaultDisplay()
.getRotation();
int degrees = 0;
switch(rotation){
case Surface.ROTATION_0:
degrees = 0;
break; //自然取向
case Surface.ROTATION_90:
degrees = 90;
break; //横向左
case Surface.ROTATION_180:
degrees = 180;
break; //颠倒
case Surface.ROTATION_270:
degrees = 270;
break; //横向右
}
int rotate =(info.orientation - degrees + 360)%360;
Camera.Parameters params = mCamera.getParameters();
params.setRotation(rotate);
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder){
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch(Exception e){
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder){
Log.i(PREVIEW,surfaceDestroyed);
}
}
解决方案
尝试下面的代码
mCamera = Camera.open
0 for CAMERA_FACING_BACK
1,适用于CAMERA_FACING_FRONT
I want to use the switch camera function. Currently I have Developed a Camera Object That working fine for back-camera but not working for front-camera. And I am unable to find a solution for switching between front and back cameras. Here is My Code..!
public class MyCamera extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback { Camera mCamera; SurfaceView mPreview; String filePath; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.camera_preview); mPreview = (SurfaceView) findViewById(R.id.preview); mPreview.getHolder().addCallback(this); mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mCamera = Camera.open(); } @Override public void onPause() { super.onPause(); mCamera.stopPreview(); } @Override public void onDestroy() { super.onDestroy(); mCamera.release(); Log.d("CAMERA", "Destroy"); } public void onCancelClick(View v) { finish(); } public void onSnapClick(View v) { mCamera.takePicture(this, null, null, this); } @Override public void onShutter() { Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show(); } @Override public void onPictureTaken(byte[] data, Camera camera) { FileOutputStream fos = null; try { filePath = "/sdcard/test.jpg"; fos = new FileOutputStream(filePath); fos.write(data); fos.close(); // Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } catch (FileNotFoundException e) { e.printStackTrace(); Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } catch (IOException e) { e.printStackTrace(); Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } finally { Intent i = getIntent(); i.putExtra("Path", filePath); setResult(RESULT_OK, i); finish(); } camera.startPreview(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { Camera.CameraInfo info = new Camera.CameraInfo(); Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_FRONT, info); int rotation = this.getWindowManager().getDefaultDisplay() .getRotation(); int degrees = 0; switch (rotation) { case Surface.ROTATION_0: degrees = 0; break; // Natural orientation case Surface.ROTATION_90: degrees = 90; break; // Landscape left case Surface.ROTATION_180: degrees = 180; break;// Upside down case Surface.ROTATION_270: degrees = 270; break;// Landscape right } int rotate = (info.orientation - degrees + 360) % 360; Camera.Parameters params = mCamera.getParameters(); params.setRotation(rotate); mCamera.setParameters(params); mCamera.setDisplayOrientation(90); mCamera.startPreview(); } @Override public void surfaceCreated(SurfaceHolder holder) { try { mCamera.setPreviewDisplay(mPreview.getHolder()); } catch (Exception e) { e.printStackTrace(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { Log.i("PREVIEW", "surfaceDestroyed"); }
}
解决方案Try below code
mCamera= Camera.open(cameraId);
0 for CAMERA_FACING_BACK
1 for CAMERA_FACING_FRONT
Reference Camera.open(int)
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