Reputation: 610
I've got three views in my activity in a linear vertical layout. The top and bottom views have fixed heights and the middle view takes whatever height is left available. This is how I set the sizes for the views:
void resize(int clientHeight)
{
int heightMiddle = clientHeight - heightTop - heightBottom;
topView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, heightTop));
middleView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, heightMiddle));
bottomView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
}
In order to obtain the clientHeight, I overrode the onMeasure() function and call resize() inside my overridden onMeasure() function. This works well in onCreate(). However when the phone orientation changes, it does not work. What I observed is that after onCreate(), onMeasure() is called twice. After onConfigurationChanged(), onMeasure() is only called once and my resizing code does not get a chance to take effect. My kluge solution is to setup a timer to call resize() 20ms later:
timer.schedule(new TimerTask()
{
@Override
public void run()
{
activity.runOnUiThread(new UiTask());
}
}, 20);
where UiTask will simply call resize(). This works for me, but I feel that there's got to be a better solution. Can someone shed some light on this?
Upvotes: 0
Views: 1878
Reputation: 10358
Why not let LinearLayout do the layouting with the help of the android:layout_weight
attribute? That way, you don't need any extra code at all, everything will just work. Here's what your res/layout/main.xml could look like:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Top"
android:layout_weight="0"
android:background="#ff0000"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Middle"
android:layout_weight="1"
android:background="#00ff00"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="25dp"
android:text="Bottom"
android:layout_weight="0"
android:background="#0000ff"
/>
</LinearLayout>
And with no more code other than the regular
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
it would look like this in portrait:
and like this in landscape (automatically relayouted and redrawn):
This works both with and without android:configChanges="orientation"
for the activity in the manifest. You'll also be able to setup the above layout using Java code if you need to.
Upvotes: 1