存储位图截图在Android的高速缓存 [英] Store Bitmap Screenshot in Android Cache

问题描述

有人可以帮我做下面的商城我的code缓存，而不是我的SD卡。我以我的应用程序的屏幕截图，以用于在社交媒体上分享。

 
//图像的命名和路径，包括SD卡
                字符串的mpath = Environment.getExternalStorageDirectory（）的toString（）+/+ ACCUWX.IMAGE_APPEND。

                //创建位图截屏
                点阵位图;
                查看V1 = mCurrentUrlMask.getRootView（）;
                v1.setDrawingCacheEnabled（真正的）;
                位图= Bitmap.createBitmap（v1.getDrawingCache（））;
                v1.setDrawingCacheEnabled（假）;

                OutputStream的FOUT = NULL;
                镜像文件=新的文件（的mpath）;

                尝试 {
                    FOUT =新的FileOutputStream（镜像文件）;
                    bitmap.com preSS（Bitmap.Com pressFormat.JPEG，90，FOUT）;
                    fout.flush（）;
                    fout.close（）;

                }赶上（FileNotFoundException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }赶上（IOException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }
 

这里是我的社会媒体code分享的截图：

 
意图socialIntent =新的意图（Intent.ACTION_SEND）;
                    socialIntent.addFlags（Intent.FLAG_GRANT_READ_URI_PERMISSION）;
                    开放的我们的uri = Uri.fromFile（新文件（的mpath））;

                    socialIntent.putExtra（Intent.EXTRA_STREAM，URI）;
                    socialIntent.setType（为image / jpeg）;

                    startActivity（Intent.createChooser（socialIntent，你怎么想的份额？））;
 

解决方案

虽然不存储位图缓存，因为会出现内存泄漏问题是个好主意。但是，你可以做以下的事情存储位图缓存。

 静态HashMap中＆LT;字符串，位图＆GT;缓存=新的HashMap＆LT;字符串，位图＆GT;（）;
 

存储位图到缓存

  

cache.put（文件名，BMP）;

后，下面的code检索缓存的使用位图

 如果（cache.containsKey（文件名））{
        imageView.setImageBitmap（cache.get（文件名））;
    }
 

Can someone please help me make my code below store to cache rather than my sd card. I am taking a screenshot of my application to use for sharing on social media.

// image naming and path  to include sd card
                String mPath = Environment.getExternalStorageDirectory().toString() + "/" + ACCUWX.IMAGE_APPEND;   

                // create bitmap screen capture
                Bitmap bitmap;
                View v1 = mCurrentUrlMask.getRootView();
                v1.setDrawingCacheEnabled(true);
                bitmap = Bitmap.createBitmap(v1.getDrawingCache());
                v1.setDrawingCacheEnabled(false);

                OutputStream fout = null;
                imageFile = new File(mPath);

                try {
                    fout = new FileOutputStream(imageFile);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fout);
                    fout.flush();
                    fout.close();

                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

And here is my Social Media code to share the screenshot:

Intent socialIntent = new Intent(Intent.ACTION_SEND); 
                    socialIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 
                    Uri uri = Uri.fromFile(new File(mPath));

                    socialIntent.putExtra(Intent.EXTRA_STREAM, uri);
                    socialIntent.setType("image/jpeg");

                    startActivity(Intent.createChooser(socialIntent, "How do you wanna share?"));

解决方案

Although it is not a good idea to store bitmap in cache because there will be memory leak issue. But, you can do following thing to store bitmap in cache.

static HashMap<String, Bitmap> cache=new HashMap<String, Bitmap>();

to store bitmap into cache

cache.put(filename, bmp);

later, to retrieve bitmap from cache use following code,

    if(cache.containsKey(filename)){
        imageView.setImageBitmap(cache.get(filename));
    }

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