Hotentorで使ったViewユーティリティから一部抜粋。

ViewUtil.java

package jp.hateblo.shin.hotentor.util;

import android.annotation.TargetApi;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.TypedValue;
import android.view.View;

import jp.hateblo.shin.hotentor.App;

/**
 * Created by shin on 2014/08/30.
 */
public class ViewUtil {

    public static final int dip2px(int dip) {
        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip,
                App.getAppContext().getResources().getDisplayMetrics());
    }

    public static final int getScreenWidth() {
       return App.getAppContext().getResources().getDisplayMetrics().widthPixels;
    }

    public static final int getScreenHeight() {
        return App.getAppContext().getResources().getDisplayMetrics().heightPixels;
    }

    // http://stackoverflow.com/a/11947755
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @SuppressWarnings("deprecation")
    public static void setViewBackground(View view, Drawable bg) {
        int sdk = android.os.Build.VERSION.SDK_INT;
        if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
            view.setBackgroundDrawable(bg);
        } else {
            view.setBackground(bg);
        }
    }


}