Global variable in android

Question

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Android global variable

I am working with an Android project. I have two activities. I am designing a file uploader. The first activity is to choose a file. The second one is used to uploading the selected file.

How can i make a global variable So the file path selected in the first activity can be used by the second activity.

Is SharedPreference suitable for this or what's the best solution for this?

http://stackoverflow.com/questions/1944656/android-global-variable — Nikunj Patel, Oct 11 '11 at 10:33
see http://stackoverflow.com/questions/2965109/passing-data-between-activities-in-android — Mohit, Oct 11 '11 at 10:35
Use [startactivityforresult()](http://developer.android.com/guide/topics/fundamentals/activities.html#StartingAnActivityForResult) for this. — Vineet Shukla, Oct 11 '11 at 10:33
sorry @vineet sir, i cant use startActivity() because i will do some more fuctionality with this . so please tell me something other solution so i can use variable of one activity in another activity ? — Pushpendra Kuntal, Oct 11 '11 at 10:36
then you can use static variable or sharedpreference for this..... — Vineet Shukla, Oct 11 '11 at 10:38

score 3 · Accepted Answer · answered Oct 11 '11 at 10:36

You could do this from your file chooser activity:

Intent uploadActivity = new Intent(MyApp.this, UploadActivity.class);
uploadActivity.putExtra("filePath", filePath);
startActivity(uploadActivity);

And then read the extras from your UploadActivity:

String filePath = getIntent().getStringExtra("filePath");

score 2 · Answer 2 · answered Oct 11 '11 at 10:34

Yes SharedPreference would be what i would suggest.

Just Map the File path to a key like this:

  SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
  SharedPreferences.Editor editor = settings.edit();
  editor.putString("filePath" filePath(Variable));

score 2 · Answer 3 · answered Oct 11 '11 at 10:34

2

SharedPreferences is one way of doing this. Another one is creating a Application class. You can access the singleton instance of Application class and share the data across the activities.

answered Oct 11 '11 at 10:34

Pavan

711
2
6
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score 2 · Answer 4 · answered Oct 11 '11 at 10:48

2

You can use one of the below mentioned options

Pass required data from one activity to other via intents (Preferred)
Use shared preferences

answered Oct 11 '11 at 10:48

Basavraj

64
2

score 1 · Answer 5 · answered Oct 11 '11 at 10:35

as per give solution by vineet or pass result from one activity to second through

Intent i = new Intent(this, ToClass.class);
    i.putExtra("fname", Name_temp);
startActivity(i);

second side:

     Intent i1 = getIntent();
int lastscore4 =  i1.getIntExtra("fname", 1);

Global variable in android

5 Answers5