Android实现截屏和截长图功能的各种方法

原文地址:https://blog.csdn.net/shenggaofei/article/details/80082610
1 普通截屏

    /**
     * 截屏
     *
     * @param activity
     * @return
     */
    public static Bitmap activityShot(Activity activity) {
       /*获取windows中最顶层的view*/
        View view = activity.getWindow().getDecorView();
        //允许当前窗口保存缓存信息
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        //获取状态栏高度
        Rect rect = new Rect();
        view.getWindowVisibleDisplayFrame(rect);
        int statusBarHeight = rect.top;
        WindowManager windowManager = activity.getWindowManager();
        //获取屏幕宽和高
        DisplayMetrics outMetrics = new DisplayMetrics();
        windowManager.getDefaultDisplay().getMetrics(outMetrics);
        int width = outMetrics.widthPixels;
        int height = outMetrics.heightPixels;
        //去掉状态栏
        Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache(), 0, statusBarHeight, width, height - statusBarHeight);
        //销毁缓存信息
        view.destroyDrawingCache();
        view.setDrawingCacheEnabled(false);
        return bitmap;
    }

2 截取scrollview

/**
     * 截取scrollview的屏幕
     * @param scrollView
     * @return
     */
    public static Bitmap getBitmapByView(ScrollView scrollView) {
        int h = 0;
        Bitmap bitmap = null;
        // 获取listView实际高度
        for (int i = 0; i < scrollView.getChildCount(); i++) {
            h += scrollView.getChildAt(i).getHeight();
            scrollView.getChildAt(i).setBackgroundResource(R.drawable.white_drawable);
        }
 
        // 创建对应大小的bitmap
        bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
                Bitmap.Config.ARGB_8888);
        final Canvas canvas = new Canvas(bitmap);
        scrollView.draw(canvas);
        // 测试输出
        FileOutputStream out = null;
        try {
            out = new FileOutputStream("/sdcard/screen_test.png");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            if (null != out) {
                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
                out.flush();
                out.close();
            }
        } catch (IOException e) {
            // TODO: handle exception
        }
        return bitmap;
}

3 截取ListView的屏幕方法

/**
     *  截图listview
     * **/
    public static Bitmap getbBitmap(ListView listView) {
        int h = 0;
        Bitmap bitmap = null;
        // 获取listView实际高度
        for (int i = 0; i < listView.getChildCount(); i++) {
            h += listView.getChildAt(i).getHeight();
        }
 
        // 创建对应大小的bitmap
        bitmap = Bitmap.createBitmap(listView.getWidth(), h,
                Bitmap.Config.ARGB_8888);
        final Canvas canvas = new Canvas(bitmap);
        listView.draw(canvas);
        // 测试输出
        FileOutputStream out = null;
        try {
            out = new FileOutputStream("/sdcard/screen_test.png");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            if (null != out) {
                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
                out.flush();
                out.close();
            }
        } catch (IOException e) {
            // TODO: handle exception
        }
        return bitmap;
    }

4 截取线性布局或相对布局屏幕的方法

/**
     * 截取RelativeLayout
     **/
    public static Bitmap getRelativeLayoutBitmap(RelativeLayout relativeLayout) {
        int h = 0;
        Bitmap bitmap;
        for (int i = 0; i < relativeLayout.getChildCount(); i++) {
            h += relativeLayout.getChildAt(i).getHeight();
        }
        // 创建对应大小的bitmap
        bitmap = Bitmap.createBitmap(relativeLayout.getWidth(), h,
                Bitmap.Config.ARGB_8888);
        final Canvas canvas = new Canvas(bitmap);
        relativeLayout.draw(canvas);
        return bitmap;
    }
    /**
     * 截取LinearLayout
     **/
    public static Bitmap getLinearLayoutBitmap(LinearLayout linearLayout) {
        int h = 0;
        Bitmap bitmap;
        for (int i = 0; i < linearLayout.getChildCount(); i++) {
            h += linearLayout.getChildAt(i).getHeight();
        }
        // 创建对应大小的bitmap
        bitmap = Bitmap.createBitmap(linearLayout.getWidth(), h,
                Bitmap.Config.ARGB_8888);
        final Canvas canvas = new Canvas(bitmap);
        linearLayout.draw(canvas);
        return bitmap;
    }

5 截取除了导航栏之外的整个屏幕

/**
     * 截取除了导航栏之外的整个屏幕
     */
    public static Bitmap screenShotWholeScreen(Activity activity) {
        View dView = activity.getWindow().getDecorView();
        dView.setDrawingCacheEnabled(true);
        dView.buildDrawingCache();
        Bitmap bitmap = Bitmap.createBitmap(dView.getDrawingCache());
        return bitmap;
    }