本文介绍了为什么我的FrameLayout有0高度?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个的FrameLayout,包含各种叠加ImageViews:
I have a FrameLayout, containing various overlayed 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code我尝试和渲染我的FrameLayout:
In my code I try and render my 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code。与崩溃:
My code crashes with:
java.lang.IllegalArgumentException: The validated expression is false
at org.apache.commons.lang3.Validate.isTrue(Validate.java:180)
这是崩溃的线是 Validate.isTrue(高度大于0);
为什么我的FrameLayout没有一个高度?有没有办法得到确切的像素高度和宽度,我的FrameLayout是在渲染?
Why does my FrameLayout not have a height? Is there a way to get the exact px height and width that my FrameLayout is rendering at?
推荐答案
这可能会帮助你。
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*/
}
});
}
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