获得屏幕相关的辅助类

来源：互联网发布：网络安全产品编辑：程序博客网时间：2024/05/01 11:48
public class ScreenUtils {    private ScreenUtils() {        throw new UnsupportedOperationException("cannot be instantiated");    }    /**     * 获得屏幕高度     *     * @param context     * @return     */    public static int getScreenWidth(Context context) {        WindowManager wm = (WindowManager) context                .getSystemService(Context.WINDOW_SERVICE);        DisplayMetrics outMetrics = new DisplayMetrics();        wm.getDefaultDisplay().getMetrics(outMetrics);        return outMetrics.widthPixels;    }    /**     * 获得屏幕宽度     *     * @param context     * @return     */    public static int getScreenHeight(Context context) {        WindowManager wm = (WindowManager) context                .getSystemService(Context.WINDOW_SERVICE);        DisplayMetrics outMetrics = new DisplayMetrics();        wm.getDefaultDisplay().getMetrics(outMetrics);        return outMetrics.heightPixels;    }    /**     * 获得状态栏的高度     *     * @param context     * @return     */    public static int getStatusHeight(Context context) {        int statusHeight = -1;        try {            Class<?> clazz = Class.forName("com.android.internal.R$dimen");            Object object = clazz.newInstance();            int height = Integer.parseInt(clazz.getField("status_bar_height")                    .get(object).toString());            statusHeight = context.getResources().getDimensionPixelSize(height);        } catch (Exception e) {            e.printStackTrace();        }        return statusHeight;    }    /**     * 获取当前屏幕截图，包含状态栏     *     * @param activity     * @return     */    public static Bitmap snapShotWithStatusBar(Activity activity) {        View view = activity.getWindow().getDecorView();        view.setDrawingCacheEnabled(true);        view.buildDrawingCache();        Bitmap bmp = view.getDrawingCache();        int width = getScreenWidth(activity);        int height = getScreenHeight(activity);        Bitmap bp = null;        bp = Bitmap.createBitmap(bmp, 0, 0, width, height);        view.destroyDrawingCache();        return bp;    }    /**     * 获取当前屏幕截图，不包含状态栏     *     * @param activity     * @return     */    public static Bitmap snapShotWithoutStatusBar(Activity activity) {        View view = activity.getWindow().getDecorView();        view.setDrawingCacheEnabled(true);        view.buildDrawingCache();        Bitmap bmp = view.getDrawingCache();        Rect frame = new Rect();        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);        int statusBarHeight = frame.top;        int width = getScreenWidth(activity);        int height = getScreenHeight(activity);        Bitmap bp = null;        bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height                - statusBarHeight);        view.destroyDrawingCache();        return bp;    }    /**     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)     *     * @param context     * @param dpValue     * @return     */    public static int dip2px(Context context, float dpValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }    /**     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp     *     * @param context     * @param pxValue     * @return     */    public static int px2dip(Context context, float pxValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (pxValue / scale + 0.5f);    }    /**     * 将pixel转换成sp     *     * @param context     * @param pixelValue     * @return     */    public static int pixelToSp(Context context, float pixelValue) {        float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;        int sp = (int) (pixelValue / scaledDensity + 0.5f);        System.out.println("pixelToSp---> pixelValue=" + pixelValue                + ",scaledDensity=" + scaledDensity + ",sp=" + sp);        return sp;    }    /**     * 将sp转换成pixel     *     * @param context     * @param spValue     * @return     */    public static int spToPixel(Context context, float spValue) {        float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;        int pixelValue = (int) (spValue * scaledDensity + 0.5f);        System.out.println("spToPixel---> spValue=" + spValue                + ",scaledDensity=" + scaledDensity + ",pixelValue="                + pixelValue);        return pixelValue;    }    /**     * 不改变控件位置，修改控件大小     *     * @param v     * @param W     * @param H     */    public static void changeWH(View v, int W, int H) {        LayoutParams params = (LayoutParams) v.getLayoutParams();        params.width = W;        params.height = H;        v.setLayoutParams(params);    }    /**     * 修改控件的高     *     * @param v     * @param H     */    public static void changeH(View v, int H) {        LayoutParams params = (LayoutParams) v.getLayoutParams();        params.height = H;        v.setLayoutParams(params);    }}
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