我有一个FrameLayout,包含各种重叠的ImageViews:
<FrameLayout
android:id="@+id/australia_frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/australia"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/map_australia"
/>
<ImageView
android:id="@+id/nsw"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/map_nsw"
android:visibility="invisible"
/>
<ImageView
android:id="@+id/victoria"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/map_victoria"
android:visibility="invisible"
/>
...etc...
</FrameLayout>
在我的代码中,我尝试渲染我的FrameLayout:
final Dialog dialog = new Dialog((Context) parent);
dialog.setContentView(R.layout.dialog_region);
FrameLayout fl = (FrameLayout) dialog.findViewById(R.id.australia_frame);
final int height = fl.getHeight();
Validate.isTrue(height > 0);
我的代码崩溃了:
java.lang.IllegalArgumentException: The validated expression is false
at org.apache.commons.lang3.Validate.isTrue(Validate.java:180)
崩溃的行是Validate.isTrue(height > 0);
。
为什么我的FrameLayout没有高度?有没有办法获得我的FrameLayout渲染的精确px高度和宽度?
答案 0 :(得分:4)
这可能对您有所帮助
FrameLayout target = (FrameLayout) dialog.findViewById(R.id.australia_frame);
target.post(new Runnable() {
@Override
public void run() {
int width = target.getWidth();
int height = width/2;
/*your code with width and height*/
}
});
}