我已经看过很多关于相机预览的帖子,上面有一个透明的图像/按钮,但是我想知道如何制作半透明的相机预览,我试图在xml中使用#800000透明的Surfaceview文件,但它对相机预览没有任何影响..我试图制作类似于透明屏幕的应用程序。这是我提供的服务:
public class FlyingCamera extends Service implements SurfaceHolder.Callback{
SurfaceView view;
SurfaceHolder holder;
Camera c;
View child;
LayoutInflater inflater;
Context context;
public Camera camera=null;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSLUCENT);
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View myView = inflater.inflate(R.layout.camera_surface, null);
view = (SurfaceView) myView.findViewById(R.id.surfaceView1);
holder=view.getHolder();
holder.addCallback(this);
myView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("Touch", "touch me");
return false;
}
});
// Add layout to window manager
wm.addView(myView, params);
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
stopSelf();
super.onDestroy();
Log.d("Destroy","God Help DESTROY");
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera=Camera.open();
try{
camera.setPreviewDisplay(holder);
camera.setDisplayOrientation(90);
}catch(Exception e){
Log.d("exceptie", "nu a mers");
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
Camera.Parameters params=camera.getParameters();
params.setPreviewSize(width, height);
camera.setParameters(params);
camera.startPreview();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera=null;
}
} `
答案 0 :(得分:3)
您无法使相机预览透明。
但你可以隐藏它。只需将预览曲面大小设置为1x1像素:
Camera.Parameters params = camera.getParameters();
surfaceView.getLayoutParams().width = 1;
surfaceView.getLayoutParams().height = 1;
这是BTW,是最新Android Security holes之后的诀窍。
Gilad Haimov
答案 1 :(得分:0)
透明色码为#00000000 ..您设置的#800000不是透明色。
Try setting the surfaceView color #00000000.
希望这会有所帮助。