Android中动态向TextView传值的问题

MainActivity的代码：

package com.example.androidsendnum;

import java.io.InterruptedIOException;

import android.os.Bundle;
 import android.app.Activity;
 import android.view.Menu;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

public class MainActivity extends Activity {

int i;
 int j;
 boolean flag;
 Thread thread = new Thread();
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final Button bnSend =(Button)findViewById(R.id.send);
    final Button bnStop =(Button)findViewById(R.id.stop);
    TextView sendView =(TextView)findViewById(R.id.sendtext);
    TextView receiveView =(TextView)findViewById(R.id.receivetext);

    bnSend.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            flag=true;
            thread.start();
        }
    });

    bnStop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub  
            flag=false;
        }
    });

    sendView.setText(i);
    receiveView.setText(i);
}


@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; 
}

public void run() {
    // TODO Auto-generated method stub
    while(flag){
        for(i=1,j=0;j<100;i++,j++){
            try {
                thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

}


}

但是在模拟器中就打不开