Question

我知道这是重复的问题，但没有任何解决方案。我在API 23上使用了最新的API Level 24和Test 23.我必须使用我的App Name文件夹将图像保存在SD卡上但是没有创建文件夹......

我已经编写了以下方法，但它无法正常工作

    public  void actionScreenShot(View view) {

        //enable drawing cache true
        imageContainer.setDrawingCacheEnabled(true);
        imageContainer.buildDrawingCache(true);

        //create image from layout
        Bitmap bitmap = Bitmap.createBitmap(imageContainer.getDrawingCache());


        //String folder_path = getApplicationContext().getFilesDir().getPath() + "/MyAppTest/"; //It's work properly
        //String folder_path = getApplicationContext().getExternalFilesDir(Environment.DIRECTORY_DCIM) + "/MyAppTest/"; //It's work properly 
        String folder_path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath() + "/MyAppTest"; //It's not work properly
        if (checkFile(folder_path)) {
            saveFile(new File(folder_path), bitmap);
        } else {
            File folder = new File(folder_path);
            if (folder.mkdirs()) {
                saveFile(folder, bitmap);
            } else {
                Log.d("Directory", " >> not created");
            }

        }
    }

    public void saveFile(File folder, Bitmap bitmap) {
        boolean success = false;
        try {
            File file = new File(folder, "temp.png");
            if (file.exists()) file.delete();
            FileOutputStream out = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
            out.flush();
            out.close();
            success = checkDatabase(file.getPath());
        }catch (Exception e) {
            e.printStackTrace();
        }

        if (success) {
            Log.d("FILE", "success");
        } else {
            Log.d("FILE", "not success");
        }
    }

    public boolean checkFile(String myPath) {
        boolean isExist = false;
        try {
            File file = new File(myPath);
            isExist = file.exists();
        } catch (Exception e) {

        }
        return isExist;

    }

AndroidManifest.xml中也提供了权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

记录跟踪如下......

10-05 17:08:09.424 2808-2808/packagename D/Directory  >> not created

如果有任何解决方案可以帮助我......

...谢谢

Answer 1

这是在sdcard中创建文件夹的简单代码

// create a File object for the parent directory
File newFolder = new File("/sdcard/newFolder/");
// have the object build the directory structure, if needed.
newFolder.mkdirs();
// create a File object for the output file
File outputFile = new File(newFolder, filename);
// now attach the OutputStream to the file object, instead of a String           
FileOutputStream fos = new FileOutputStream(outputFile);

清单文件中的

权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Answer 2

问题是您使用的是API 23和24（Marshmallow）。 Google从API 23更改了权限策略。将目标版本减少到22.它会起作用。如果您想要23或24，则包含在运行时请求权限的代码。

在Android下的DCIM文件夹下的SD卡上创建文件夹时出错

2 个答案: