Android 擷取螢幕高寬度，密度，通知欄高度，截圖等常用方法

版權聲明：本文為部落客原創文章，轉載請标明出處。 https://blog.csdn.net/lyhhj/article/details/49105255

分享一下Android中常用的一些輔助方法：

擷取螢幕高度：

/**
     * 獲得螢幕高度
     * @param context
     * @return
     * by Hankkin at:2015-10-07 21:15:59
     */
    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;
    }           

擷取螢幕寬度：

/**
     * 獲得螢幕寬度
     * @param context
     * @return
     * by Hankkin at:2015-10-07 21:16:13
     */
    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;
    }           

擷取螢幕密度：

/**
     * 擷取螢幕密度
     * @param context
     * @return
     * by Hankkin at:2015-10-07 21:16:29
     */
    public static float getScreenDensity(Context context) {
        return context.getResources().getDisplayMetrics().density;
    }           

dip轉px：

/**
     * dip轉px像素
     * @param context
     * @param px
     * @return
     * by Hankkin at:2015-10-07 21:16:43
     */
    public static int dip2px(Context context, float px) {
        final float scale = getScreenDensity(context);
        return (int) (px * scale + 0.5);
    }           

擷取狀态欄高度：

/**
     * 獲得狀态欄的高度
     * @param context
     * @return
     * by Hankkin at:2015-10-07 21:16:43
     */
    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;
    }           

擷取螢幕目前截圖：

/**
     * 擷取目前螢幕截圖，包含狀态欄
     * @param activity
     * @return
     * by Hankkin at:2015-10-07 21:16:43
     */
    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;

    }

    /**
     * 擷取目前螢幕截圖，不包含狀态欄
     * @param activity
     * @return
     * by Hankkin at:2015-10-07 21:16:43
     */
    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;

    }