Passing values from one Activity to another

Intent intent = new Intent(context, CalledActivity.class);

        intent.putExtra(key, value);

        startActivity(intent);

       

If you want some data back from called Activity then you can use startActivityForResult() as:

Intent intent = new Intent(context, CalledActivity.class);

        intent.putExtra(key, value);

        startActivityForResult(intent, requestCode);

       

In called activity you can set data as:

setResult(RESULT_OK, intent);

Note: Here you set the value in intent and pass it to setResult().       

       

On returning back to calling Activity you can get data by overriding:

@Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        super.onActivityResult(requestCode, resultCode, data);

        if(resultCode == RESULT_OK){

            //Get data from Intent "data" and do your task here....

        }

    }

   

   

Note: You can pass primitive data type values thru Intent and if you want to pass other types then you have to use Bundle like this.

Bundle data = new Bundle();

        data.putIntArray(key, value);

        //same way you can set other values.......

//Now set this Bundle value to Intent as you do for primitive type....

Intent intent = new Intent(context, CalledActivity.class);

        intent.putExtra(data);

        startActivity(intent);

Receiving data in Activity:

//For primitive values:

DataType var_name = getIntent().getExtras().get(key);

//For Bundle values:

Bundle var_name = getIntent().getExtras().getBundle(key);