This code is not working for me........i'm trying to use Shared
preferences to store long values.....the code is correct and is
launching successfully when i switch from long to int values....please
help


package d.preferencesdemo1;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class preferencesdemo1 extends Activity {
    /** Called when the activity is first created. */
        EditText t;
          long mobileno;
          TextView text;
             SharedPreferences app_preferences;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        // Get the app's shared preferences
        app_preferences =
                PreferenceManager.getDefaultSharedPreferences(this);

        mobileno = app_preferences.getLong("mobileno",9028252169L);

        // Update the TextView
        text = (TextView) findViewById(R.id.text);
        text.setText("The default mobile number is " + mobileno +
".");

        // Increment the mobileno
     //   SharedPreferences.Editor editor = app_preferences.edit();
       // editor.putlong("mobileno", ++mobileno);
        //editor.commit(); // Very important


        t = (EditText) findViewById(R.id.EditText01);

        Button b2 = (Button) findViewById(R.id.Button01);
    t.setText("");


           b2.setOnClickListener(new View.OnClickListener() {
               public void onClick(View view) {

                      try {
                        // Increment the mobileno
                          SharedPreferences.Editor editor =
app_preferences.edit();
                          long tv =
Long.parseLong(t.getText().toString());
                          mobileno=tv;
                          editor.putLong("mobileno", mobileno);
                          editor.commit(); // Very important



                          text.setText("The default mobile number is "
+ mobileno + ".");

                      }
                      catch (Exception e) {

                  }
               }
           });

    }
}

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