Height of screen without status bar, actionBar and

问题:

I have a ListView that I want each row to fill a third of the available screen. I have the status bar visible, and then an actionBar with slidingTabs beneath. I'm doing the current calculation like this:

height = context.getResources().getDisplayMetrics().heightPixels;
if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))
    {
        actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data,context.getResources().getDisplayMetrics());
        Log.d("actionBarHeigth", actionBarHeight.toString());
    }

And setting the views height like this:

holder.imageView.getLayoutParams().height = (height - actionBarHeight*2) / 3;

But the rows of the list are slightly too big, and i guess it's the status bar causing it. How can I add the height of it to my calculations?

回答1:

Based on @rasmeta 's answer I made this code and it does the trick. My rows are now exactly a third of the available screen. Here is how to get the height of the status bar:

int resource = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
    if (resource > 0) {
        statusBarHeight = context.getResources().getDimensionPixelSize(resource);
    }

And the calculation of the height of each row goes like this:

holder.imageView.getLayoutParams().height = (screenHeight - statusBarHeight - actionBarHeight*2) / 3;
// actionBarHeight * 2 because the tabs have the same height as the actionBar.

回答2:

You can use this code:

public int getStatusBarHeight() { 
      int result = 0;
      int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
      if (resourceId > 0) {
          result = getResources().getDimensionPixelSize(resourceId);
      } 
      return result;
}

as described here: https://stackoverflow.com/a/3410200/1763138

Please try using this solution and tell us if it worked. ;)

回答3:

The easiest way is this:

int height = findViewById(R.id.rootView).getHeight();

rootView is the master root layout :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rootView"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
      ...
</LinearLayout>