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文字我在做一个应用程序女巫使用网络摄像头,我想显示一些文本拍摄照片后这样的方法ShutterCallBack我写这篇借鉴SurfaceHolder
ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
Log.d("DHA", "onShutter'd");
Canvas cnv = mSurfaceHolder.lockCanvas(null);
Log.w("DHA", "Nana");
Paint p = new Paint();
Log.w("DHA", "Nana2");
p.setColor(Color.RED);
Log.w("DHA", "Nana3");
cnv.drawText("Hello", 0, 0, p);
Log.w("DHA", "Nana4");
mSurfaceHolder.unlockCanvasAndPost(cnv);
Log.w("DHA", "Nana5");
}
};
失败awfuly终止我的应用程序。 ..我可以在表面写文字吗?