屏幕相关辅助类

• 获得屏幕高度 和 宽度
• 获得状态栏的高度
• 获取当前屏幕截图，包含状态栏
• 获取当前屏幕截图，不包含状态栏
• 隐藏状态栏

1. 获得屏幕高度 和 宽度

/**
     * 获得屏幕高度
     *
     * @param context context
     * @return 屏幕高度
     */
    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 context
     * @return 屏幕宽度
     */
    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;
    }

2. 获得状态栏的高度

/**
     * 获得状态栏的高度
     *
     * @param context context
     * @return 状态栏的高度
     */
    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;
    }

3. 获取当前屏幕截图，包含状态栏

/**
     * 获取当前屏幕截图，包含状态栏
     *
     * @param activity activity
     * @return Bitmap 获取当前屏幕截图，包含状态栏
     */
    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;
    }

4. 获取当前屏幕截图，不包含状态栏

/**
     * 获取当前屏幕截图，不包含状态栏
     *
     * @param activity activity
     * @return Bitmap 获取当前屏幕截图，不包含状态栏
     */
    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;

    }

5. 隐藏状态栏

/**
     * 如果系统为4.4以上 ，则隐藏状态栏
     *
     * @param activity activity
     * @param resource 资源文件最外层 layout Id
     */
    public static void hideTitleBar(Activity activity, int resource) {
        if (Build.VERSION.SDK_INT > 18) {  // 如果系统为4.4以上 ，则隐藏状态栏
            Window window = activity.getWindow();
            window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            ViewGroup whole_layout = (ViewGroup) activity.findViewById(resource);  // 页面整体布局
            whole_layout.setPadding(0, activity.getResources().getDimensionPixelSize(getStatusBarHeight()), 0, 0);
        }
    }

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