用intent实现Android中Activity之…

package zhao.random;

import android.app.Activity;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class RandomActivity extends Activity {

    

    private Button btn ;

    String random = null;

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        btn = (Button) this.findViewById(R.id.Random); 

        btn.setText("Let's Rool it!");

        btn.setOnClickListener(new ButtonListener());

        //将监听器绑定在按钮上

    }

   

   //设置监听器 

    class ButtonListener implements OnClickListener, android.view.View.OnClickListener{   

    public void onClick(View v) {

    Intent intent = new Intent();

    intent.setClass(RandomActivity.this,showActivity.class);

    //从哪儿到哪儿。。。从RandomActivity到showActivity

    // intent.getExtras("random",random);

    RandomActivity.this.startActivity(intent);

}

public void onClick(DialogInterface dialog, int which) {

}

}

}