使用以下Java和XML代码,我想知道如何正确检索内部/子布局(LinearLayout,而父级为RelativeLayout,填充值为20dp的像素)的维度:以像素为单位获取内部布局的大小
Java代码:
public class TestActivity extends Activity {
private LinearLayout linLay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
linLay = (LinearLayout)findViewById(R.id.linLay);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
linLay.setLayoutParams(lp);
getDimensions();
}
private void getDimensions() {
System.out.println(linLay.getHeight());
System.out.println(linLay.getWidth());
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp" >
<LinearLayout
android:id="@+id/linLay"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true">
</LinearLayout>
</RelativeLayout>
...因为我得到的0输出的尺寸,我知道的是,需要的LinearLayout到b首先在屏幕上设置,然后才能检索尺寸......但是我在这里做错了什么?
http://stackoverflow.com/questions/7474572/which-activity-method-is-called-after-all-the-layout-methods-was-made – Entreco