Android: Dynamic screen sizes

DimensionCalculator.java

/**
 * Sample class from Pulse
 *
 * Class to store and provide useful dimensions
 */
public class DimensionCalculator {

  private static DimensionCalculator mInstance = null;
  private int mScreenWidth;
  private int mTileWidth;

  /**
   * This class is a singleton
   */
  public static DimensionCalculator getInstance(Context context) {
    if (mInstance == null) {
      mInstance = new DimensionCalculator(context);
    }
    return mInstance;
  }

  /**
   * Initialize the class with the proper tile size
   */
  protected DimensionCalculator(Context context) {

    DisplayMetrics dm = context.getResources().getDisplayMetrics();
    mScreenWidth = Math.min(context.getResources().getDisplayMetrics().widthPixels,
    context.getResources().getDisplayMetrics().heightPixels);

    int numTiles = 3;
    int tileGap = 2;
    mTileWidth = (int) ((mScreenWidth - 4 * tileGap) / numTiles);

  }

  /**
   * Return the appropriate tile size for this device
   */
  public int getTileWidth() {
    return mTileWidth;
  }
}