将Android中的位图保存为外部存储中的JPEG文件夹

Question

我使用此代码将位图保存在外部存储中但如果它不存在则不会创建该文件夹:

String path = Environment.getExternalStorageDirectory().toString();
        OutputStream fOutputStream = null;
        File file = new File(path + "/Captures/", "screen.jpg");
        try {
            fOutputStream = new FileOutputStream(file);

            capturedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOutputStream);

            fOutputStream.flush();
            fOutputStream.close();

            MediaStore.Images.Media.insertImage(getContentResolver(), file.getAbsolutePath(), file.getName(), file.getName());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            Toast.makeText(this, "Save Failed", Toast.LENGTH_SHORT).show();
            return;
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(this, "Save Failed", Toast.LENGTH_SHORT).show();
            return;
        }

如果不存在,如何将图像保存在新目录中,如果设备中有文件夹,则保存默认值？

Answer 1

尝试这个它会给你的结果肯定:

String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/req_images");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-" + n + ".jpg";
File file = new File(myDir, fname);
Log.i(TAG, "" + file);
if (file.exists())
    file.delete();
try {
    FileOutputStream out = new FileOutputStream(file);
    bm.compress(Bitmap.CompressFormat.JPEG, 90, out);
    out.flush();
    out.close();
} catch (Exception e) {
    e.printStackTrace();
}

添加此项以在图库中显示:

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));

查看此链接以获得明确答案: 在库中显示文件夹图像

Answer 2

请使用下面的代码片段可能会有所帮助

String path = Environment.getExternalStorageDirectory().toString();
OutputStream fOutputStream = null;
File file = new File(path + "/Captures/", "screen.jpg");
if (!file.exists()) {
    file.mkdirs();
}

try {
    fOutputStream = new FileOutputStream(file);

    capturedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOutputStream);

    fOutputStream.flush();
    fOutputStream.close();

    MediaStore.Images.Media.insertImage(getContentResolver(), file.getAbsolutePath(), file.getName(), file.getName());
} catch (FileNotFoundException e) {
    e.printStackTrace();
    Toast.makeText(this, "Save Failed", Toast.LENGTH_SHORT).show();
    return;
} catch (IOException e) {
    e.printStackTrace();
    Toast.makeText(this, "Save Failed", Toast.LENGTH_SHORT).show();
    return;
}