我注意到,在调用onMeasure()之后,我的应用程序视图为getWidth()和getHeight()返回0。这只发生在少数设备上,对于大多数Android设备,下面的代码工作正常。我的checkViewAndLoad()函数根据视图的大小加载缩放的位图。
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.d("widthMeasureSpec", Integer.toString(MeasureSpec.getSize(widthMeasureSpec)));
Log.d("heightMeasureSpec", Integer.toString(MeasureSpec.getSize(heightMeasureSpec)));
Log.d("viewWidth", Integer.toString(getWidth()));
Log.d("viewHeight", Integer.toString(getHeight()));
checkViewAndLoad();
}
以下是onMeasure()之后为getWidth()/ getHeight()返回零的设备(Motorola Droid Razr Maxx)的日志:
09-03 20:55:58.359: D/widthMeasureSpec(29496): 540
09-03 20:55:58.359: D/heightMeasureSpec(29496): 720
09-03 20:55:58.359: D/viewWidth(29496): 0
09-03 20:55:58.359: D/viewHeight(29496): 0
我也尝试手动设置MeMeuredDimensions(),但是这一手不会影响日志。
有人可以告诉我这里我做错了什么,或者在调用onMeasure()之后如何获得SurfaceView的宽度/高度?
答案 0 :(得分:9)
在此处使用getMeasuredWidth/Height()
。 getWidth/Height()
在布局后才有效。
答案 1 :(得分:1)
尝试这种方式
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
Log.d("widthMeasureSpec", Integer.toString(MeasureSpec.getSize(widthMeasureSpec)));
Log.d("heightMeasureSpec", Integer.toString(MeasureSpec.getSize(heightMeasureSpec)));
Log.d("viewWidth", Integer.toString(getWidth()));
Log.d("viewHeight", Integer.toString(getHeight()));
if(getMeasuredWidth()!=0 && getMeasuredHeight()!=0){
checkViewAndLoad();
}
}