android – 获取RelativeLayout维度
作者:互联网
如何将layout_width和layout_height设置为wrap_content来获取某个布局(如linearlayout或relativelayout)的测量值?使用这种方法
layout.measure(MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED));
layout.layout(0, 0,
layout.getMeasuredWidth(),
layout.getMeasuredHeight());
返回null.我正试图从relativelayout创建一个位图图像,有点像截图.
解决方法:
不要在onCreate()方法上执行此操作.试试这个:
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus == true) {
LinearLayout myLinearLayout = (LinearLayout) findViewById(R.id.myLinearLayout);
int layoutWidth = myLinearLayout.getWidth();
int layoutHeight = myLinearLayout.getHeight();
}
}
当onCreate()已知大小时,将调用此方法.
标签:android,android-layout,android-image 来源: https://codeday.me/bug/20190827/1735810.html