我的应用程序在哪里将文件保存在外部存储中？

Question

I am using this code to save some text in the external storage.

                String fileName = "zadTest";
            String text = "Hello World!";
            if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())){
                File textFile = new File(Environment.getExternalStorageDirectory(),fileName);
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(textFile);
                    fos.write(text.getBytes());
                } catch (IOException e) {
                    e.printStackTrace();
                }finally {
                    if (fos != null) {
                        try {
                            fos.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }

But I don't know where to look for it exactly so I can't check if I am doing this correctly and I don't know if I really put some data into external storage. I checked my SD card but couldn't find it I also tried to run this app on emulator but also cant find the file.

I have put these in the manifest:

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

Additional question: Should I bother with "finally" in try/catch blocks or should I just put all the code in "try" and skip "finally"?

Answer 1

Here I placed code with run-time permission put this and check again Put this permission in on create and call request permission in that.

   private static final int REQUEST_CODE = 101;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ||
                ContextCompat.checkSelfPermission(this, android.Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            requestPermission(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE, android.Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_CODE);
        } else {

            String fileName = "zadTest";
            String text = "Hello World!";
            if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
                File textFile = new File(Environment.getExternalStorageDirectory(), fileName);
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(textFile);
                    fos.write(text.getBytes());
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (fos != null) {
                        try {
                            fos.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

After permission code, call this method

protected void requestPermission(String[] permissionType, int
        requestCode) {

    ActivityCompat.requestPermissions(this,
            permissionType, requestCode
    );
}