How To Write To A File In The Internal Storage With An Asynctask In A Service?

I can't use the getFilesDir() in an asynctask which is in a service. I saw this post: Android: Writing to a file in AsyncTask It solves the problem in an activity but i dont find a

Solution 1:

Both Service and Activity extend from ContextWrapper as well, so it has getFilesDir() method. Passing an instance of Service to AsyncTask object will solve it.

Something like:

Filefile=newFile(myContextRef.getFilesDir() + "/IP.txt");

When you're creating the AsyncTask pass a reference of current Service (I suppose you're creating the AsyncTaskObject from Service):

import java.io.File;

import android.app.Service;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.IBinder;

publicclassMyServiceextendsService {
    @Overridepublic IBinder onBind(Intent intent) {
        returnnull;
    }

    protectedvoiduseFileAsyncTask() {
        FileWorkerAsyncTasktask=newFileWorkerAsyncTask(this);
        task.execute();
    }

    privatestaticclassFileWorkerAsyncTaskextendsAsyncTask<Void, Void, Void> {

        private Service myContextRef;

        publicFileWorkerAsyncTask(Service myContextRef) {
            this.myContextRef = myContextRef;
        }

        @Overrideprotected Void doInBackground(Void... params) {
            Filefile=newFile(myContextRef.getFilesDir() + "/IP.txt");
            // use it ...returnnull;
        }
    }
}

Solution 2:

I think when you start your service, you should pass String path which getFileDir() provides as follow.

Intent serviceIntent = newIntent(this,YourService.class); 
serviceIntent.putExtra("fileDir", getFileDir());

In your service in onStart method,

Bundleextras= intent.getExtras(); 
if(extras == null)
    Log.d("Service","null");
else
{
    Log.d("Service","not null");
    StringfileDir= (String) extras.get("fileDir");
}