android-framelayout

Full screen background image in an activity

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There are several ways you can do it. Option 1: Create different perfect images for different dpi and place them in related drawable folder. Then set android:background=”https://stackoverflow.com/questions/16135984/@drawable/your_image” Option 2: Add a single large image. Use FrameLayout. As a first child add an ImageView. Set the following in your ImageView. android:src=”https://stackoverflow.com/questions/16135984/@drawable/your_image” android:scaleType = “centerCrop”

What are the differences between LinearLayout, RelativeLayout, and AbsoluteLayout?

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LinearLayout means you can align views one by one (vertically/ horizontally). RelativeLayout means based on relation of views from its parents and other views. ConstraintLayout is similar to a RelativeLayout in that it uses relations to position and size widgets, but has additional flexibility and is easier to use in the Layout Editor. WebView to … Read more

getHeight returns 0 for all Android UI objects

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It’s 0 because in both onCreate and onStart, the view hasn’t actually been drawn yet. You can get around this by listening for when the view is actually drawn: final TextView tv = (TextView)findViewById(R.id.venueLabel); final ViewTreeObserver observer= tv.getViewTreeObserver(); observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { tv.getHeight() observer.removeGlobalOnLayoutListener(this); } }); The call to remove the … Read more