Question

我正在尝试从URL读取文件并写入我的SD卡。因为它与.js .css和.txt文件等其他文件一起工作良好......但它不能与.png .jpg .bmp和.gif一起使用。我的代码是

String path = dir + value;
            File localConfigfile = new File(
                    Environment.getExternalStorageDirectory()
                            + "/Avalon/assets/www/" + path);
            String responseString = RequestMgr.GetWebSource(DomainName
                    + "/" + Heirarchy + "/" + Serverpath);
            FileOutputStream out;
if (localConfigfile.exists()) {
                    localConfigfile.delete();
                    out = new FileOutputStream(localConfigfile);
                    out.write(responseString.getBytes());
                }
            }

请在这里帮助我，我很震惊

Answer 1

尝试使用位图读取文件。如果您使用位图和URI读取性能

，那将是一个不错的选择

Answer 2

private void storeImage(Bitmap image) {
File pictureFile = getOutputMediaFile();
if (pictureFile == null) {
    Log.d(TAG,
            "Error creating media file, check storage permissions: ");// e.getMessage());
    return;
} 
try {
    FileOutputStream fos = new FileOutputStream(pictureFile);
    image.compress(Bitmap.CompressFormat.PNG, 90, fos);
    fos.close();
} catch (FileNotFoundException e) {
    Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
    Log.d(TAG, "Error accessing file: " + e.getMessage());
} }

在ANdroid中读取和写入SDCard图像

2 个答案: