如何在内部存储(如WhatsApp或Allo)中创建文件夹?

问题描述：

我有一个任务将位图保存在内部存储器中.我尝试了所有方式.我无法获得所需的输出.在文件夹中创建并保存在内部设备中的文件夹数据/用户/0/数据/~~ .--tried

I have a task to save the bitmap in internal storage. I tried in all ways. I can't get the required output. The folder created and saved in internal device in folder data/user/0/data/~~. --tried

File mediaFile = new File(c.getExternalCacheDir(), "/MaherSaad");

工作并在缓存中创建文件夹-android/data/com.myapp.〜/cache

worked and create folder in cache -- android/data/com.myapp.~/cache

我想创建文件夹并像这样

i want to create folder and appear like that

内部存储空间/Myapp/newFolder

答

最终找到了解决方案在数据文件夹之外创建文件夹

finally found the solution creating a folder outside data folder

简单地

File mFolder = new File(Environment.getExternalStorageDirectory(), "Folder_Name");
            if (!mFolder.exists()) {
                boolean b =  mFolder.mkdirs();

            }

该错误未处理运行时权限代码简单...

the mistake is not handling the Run time permission code simply ...

String TAG = "Permsission : ";
        if (Build.VERSION.SDK_INT >= 23) {
            if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                    == PackageManager.PERMISSION_GRANTED) {
                Log.v(TAG,"Permission is granted");
                return true;
            } else {

                Log.v(TAG,"Permission is revoked");
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
                return false;
            }
        }
        else { //permission is automatically granted on sdk<23 upon installation
            Log.v(TAG,"Permission is granted");
            return true;
        }

处理权限

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        String TAG = "Permsission : ";
        if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
            Log.v(TAG,"Permission: "+permissions[0]+ "was "+grantResults[0]);
            //resume tasks needing this permission
            //Define the path you want
            File mFolder = new File(Environment.getExternalStorageDirectory(), "Folder_Name");
            if (!mFolder.exists()) {
                boolean b =  mFolder.mkdirs();

            }
        }
    }

如何在内部存储(如WhatsApp或Allo)中创建文件夹?

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