Android保存图片到系统相册并更新

向右看齐 2022-06-11 09:07 451阅读 0赞

在网上搜了很多答案，基本上都是复制粘贴，不是这里缺了，就是那里漏了。用了我提供的方法，如果不能保存成功，你来找我！！我写的方法解决了各种蛋疼的兼容性问题，只用传context和bitmap进来就OK了！

public static void saveImageToGallery(Context context, Bitmap bmp) {
        // 首先保存图片
        File appDir = new File(Environment.getExternalStorageDirectory(), "QRCode");
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        String fileName = System.currentTimeMillis() + ".jpg";
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    
        // 其次把文件插入到系统图库
        try {
            MediaStore.Images.Media.insertImage(context.getContentResolver(),
                    file.getAbsolutePath(), fileName, null);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        // 最后通知图库更新
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { // 判断SDK版本是不是4.4或者高于4.4
            String[] paths = new String[]{file.getAbsolutePath()};
            MediaScannerConnection.scanFile(context, paths, null, null);
        } else {
            final Intent intent;
            if (file.isDirectory()) {
                intent = new Intent(Intent.ACTION_MEDIA_MOUNTED);
                intent.setClassName("com.android.providers.media", "com.android.providers.media.MediaScannerReceiver");
                intent.setData(Uri.fromFile(Environment.getExternalStorageDirectory()));
            } else {
                intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                intent.setData(Uri.fromFile(file));
            }
            context.sendBroadcast(intent);
        }
    }

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