关键代码：
mSurfaceView = new SurfaceView(mContext);mSurfaceHolder = mSurfaceView.getHolder();mSurfaceHolder.setType(SurfaceHolder.SURFACETYPE_TYPE_PUSH_BUFFERS）//获取相机缓存数据mmSurfaceHoler.addCallback(mSurfaceCallback);mWindowManager = (WindowManager)this.getSystemService(Context.WINOW_SERVICE);WindowManager.LayoutParams params = new WindowManager.LayoutParams(1,1,WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,0,PixelFormat.UNKNOWN);mWindowManager.addView(mSurfaceView);
注意事项：
mWindowManager.addView(mSurfaceView);之后操作完成之后要记得
<pre name="code" class="html">mWindowManager.removeView(mSurfaceView);<pre name="code" class="html">mSurfaceCallback = new SurfaceHoler.callBack(){public void surfaceCreated(SurfaceHoler holder){initCamera(); }
};
...)
)
