无法从查看得到的位图 [英] Not able to get the bitmap from View

问题描述

在我的应用程序，我想这是线性layout.So里面，我已经使用了图片

In my application i want the image which is inside the linear layout.So for that i have used

    view.setDrawingCacheEnabled(true); // this is coming as undefined
    view.buildDrawingCache(); // this is coming as undefined
    Bitmap cache = view.getDrawingCache(); //here am getting null

但每当我调试code我得到空的view.getDrawingCache（）。

But whenever i debug the code i am getting null at " view.getDrawingCache()".

code

public static void saveLayout(View view) {
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap cache = view.getDrawingCache();
        try {
            FileOutputStream fileOutputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/ss/file.png");
            cache.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
            fileOutputStream.flush();
            fileOutputStream.close();
        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            view.destroyDrawingCache();
        }
    }

用法

saveLayout(ll) // here ll is my linear layout

请让我再知道我错在哪里

Please lemme know where i went wrong

推荐答案

你能试试下面code？

Can you try below code?

view.buildDrawingCache(true);
Bitmap bitmap = view.getDrawingCache(true);

同时删除：

view.setDrawingCacheEnabled(true);

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