Variable onChange.java

package com.mt.myapplication2.app;

/**
 * Created by Mitchell on 3/28/14.
 */
class C
{
    private String _me;
    public String getC(){
        return _me;
    }
    public void setC(String val, Runnable callback){
        _me = val;
        callback.run();
    }
}



/**
 * Main Activity
 * */
 
 package com.mt.myapplication2.app;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;



public class MainActivity extends ActionBarActivity {
    private String x;
    private Button myButton;
    private TextView textView;
    C me = new C();
    EditText et;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = (TextView)findViewById(R.id.textView);
        textView.setMovementMethod(new ScrollingMovementMethod());
        myButton = (Button)findViewById(R.id.button);
        et = (EditText)findViewById(R.id.editText);

        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                me.setC(et.getText().toString() ,new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(getApplicationContext(), me.getC(), Toast.LENGTH_LONG).show();
                    }
                });
            }
        });


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }




}