Androidで画面サイズを取得する方法 ref: http://qiita.com/items/c1171b4904b312c9023a

file0.txt

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
overrideGetSize(display, size);

void overrideGetSize(Display display, Point outSize) {
    try {
      // test for new method to trigger exception
      Class pointClass = Class.forName("android.graphics.Point");
      Method newGetSize = Display.class.getMethod("getSize", new Class[]{ pointClass });

      // no exception, so new method is available, just use it
      newGetSize.invoke(display, outSize);
    } catch(NoSuchMethodException ex) {
      // new method is not available, use the old ones
      outSize.x = display.getWidth();
      outSize.y = display.getHeight();
    }
}