Return result back to main Activity using SharedPreference android Example

These is second method (first is already discuss in previous post) to get result from call activity.

In this example I am use SharedPreferences to retrieve result from called activity.

This method is also used to get result from anywhere in application.
You can set result from any activity and get it from any activity.

Here is complete example of SharedPreferences and how to return result from called activity to main activity.

1.  Create main activity and call new activity using startActivityForResult

     
   
public class SharedPreferenceActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        Button btnGetResult=(Button) findViewById(R.id.btnResult);
       
        final Intent intent=new Intent(this,SecondActivity.class);
       
       
       
        btnGetResult.setOnClickListener(new OnClickListener() {
           
            @Override
            public void onClick(View v) {
                startActivityForResult(intent, 1);    // call new activity
               
            }
        });
       
    }
   
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
           
            SharedPreferences myPreferences=getSharedPreferences("MYPREF",    Activity.MODE_PRIVATE);    // get preference created in called activity.
           
            String str=myPreferences.getString("STR", "empty");    //here STR is variable name same as secondActivity
           
            TextView tv=(TextView) findViewById(R.id.tvShow);
           
            tv.setText(str);
       
    }
}

2.   SecondActivity set result in SharedPreferences

     public class SecondActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.secondlayout);
       
        final SharedPreferences myPreference=getSharedPreferences("MYPREF", Activity.MODE_PRIVATE);
       
        Button btnOk=(Button) findViewById(R.id.btnOk);
        btnOk.setOnClickListener(new OnClickListener() {
          
            @Override
            public void onClick(View v) {
                EditText etText=(EditText) findViewById(R.id.etText);
                String str=etText.getText().toString();
      
                              
                SharedPreferences.Editor editor=myPreference.edit();
          
                editor.putString("STR", str);  // put value in preference
                editor.commit();   // it is must if not commit preference then it not save.
              
                finish();    // finishes current activity
            }
        });
    }
}

3.  Register second activity in AndroidManifest.xml

       <activity android:name="SecondActivity"></activity>