// 获取屏幕的宽度、高度

Display defDip = getWindowManager().getDefaultDisplay();

int disWidth = defDip.getWidth();

int disHeight = defDip.getHeight();

Log.i("TAG", "disWidth:" + disWidth + ",disHeight:" + disHeight);

//获取屏幕分辨率

DisplayMetrics dm = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(dm);

float horiDpi = dm.xdpi;  // 屏幕的水平分辨率

float vertDpi = dm.ydpi;  // 屏幕的垂直分辨率

// 获得android系统对于目前的屏幕分辨率的分类：

        int screenSizeClass = dm.densityDpi;

        Log.i("TAG", "screenSizeClass..." + screenSizeClass);

        switch (screenSizeClass) {

        case DisplayMetrics.DENSITY_LOW:    // 屏幕属于低分辨率，运行对应的代码

            Log.i("TAG", "低分辨率");

            break;

        case DisplayMetrics.DENSITY_MEDIUM: // 中分辨率

            Log.i("TAG", "中分辨率");

            break;

        case DisplayMetrics.DENSITY_HIGH:   // 高分辨率

            Log.i("TAG", "高分辨率");

            break;

        case DisplayMetrics.DENSITY_XHIGH:  // 超高分辨率

            Log.i("TAG", "超高分辨率");

            break;

        case DisplayMetrics.DENSITY_XXHIGH:

            Log.i("TAG", "超超高分辨率");

            break;

        default:

            break;

        }

        // 判断屏幕尺寸

        final int screenSize = getResources().getConfiguration().screenLayout

                & Configuration.SCREENLAYOUT_SIZE_MASK;

        switch (screenSize) {

        case Configuration.SCREENLAYOUT_SIZE_SMALL:

            break;

        case Configuration.SCREENLAYOUT_SIZE_NORMAL:

            break;

        case Configuration.SCREENLAYOUT_SIZE_LARGE:

            break;

        case Configuration.SCREENLAYOUT_SIZE_XLARGE:

            // support from API 9

            break;

        case Configuration.SCREENLAYOUT_SIZE_MASK:

            break;

        case Configuration.SCREENLAYOUT_SIZE_UNDEFINED:

            break;

        default:

            break;

        }

 有一点要注意，必须在AndroidManifest.xml里加上下面的声明 

 <supports-screens

     android:largeScreens="true"

     android:normalScreens="true"

     android:resizeable="true"

     android:smallScreens="true"

     android:xlargeScreens="true" />