Android获取屏幕分辨率和dpi

 

        String str = "";
        DisplayMetrics dm = new DisplayMetrics();
//      getWindowManager().getDefaultDisplay().getMetrics(dm);
        dm = this.getApplicationContext().getResources().getDisplayMetrics();
        int screenWidth = dm.widthPixels;
        int screenHeight = dm.heightPixels;
        float density = dm.density;
        float xdpi = dm.xdpi;
        float ydpi = dm.ydpi;
        str += "屏幕分辨率为:" + dm.widthPixels + " * " + dm.heightPixels + "\n";
        str += "绝对宽度:" + String.valueOf(screenWidth) + "pixels\n";
        str += "绝对高度:" + String.valueOf(screenHeight)
                + "pixels\n";
        str += "逻辑密度:" + String.valueOf(density)
                + "\n";
        str += "X 维 :" + String.valueOf(xdpi) + "像素每英尺\n";
        str += "Y 维 :" + String.valueOf(ydpi) + "像素每英尺\n";
        Log.i("1", str);

其中

屏幕密度（Screen density）即是屏幕的一个物理区域的像素个数，一般指的是每英寸（2.54cm）的点数（dpi, dots per inch）