Android/画面サイズ

import android.graphics.Point;
import android.view.WindowManager;
import android.view.Display;
// 画面幅サイズ(ステータスバーを含まない)
Point point = new Point();
// Android 3.2~
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
    WindowManager wm = (WindowManager) context.getSystemService(WINDOW_SERVICE);
    Display disp = wm.getDefaultDisplay();
    disp.getSize(point);
}
Log.i("test", "x=" + point.x);
Log.i("test", "y=" + point.y);

// 画面幅サイズ(ステータスバーを含む)
WindowManager windowManager = (WindowManager) context.getSystemService(WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
    // Android 4.2~
    try {
        Method getRealSize = Display.class.getMethod("getRealSize", Point.class);
        getRealSize.invoke(display, point);
        Log.i("test", "width=" + point.x);
        Log.i("test", "height=" + point.y);
    } catch (Exception e) {
        e.printStackTrace();
    }
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
    // Android 3.2~
    try {
        Method getRawWidth = Display.class.getMethod("getRawWidth");
        Method getRawHeight = Display.class.getMethod("getRawHeight");
        int width = (Integer) getRawWidth.invoke(display);
        int height = (Integer) getRawHeight.invoke(display);
        point.set(width, height);
        Log.i("test", "width=" + point.x);
        Log.i("test", "height=" + point.y);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

参考

http://qiita.com/a_nishimura/items/f557138b2d67b9e1877c

http://techbooster.org/android/hacks/16066/