28、activity之间传递数据&批量传递数据

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

/**
 * activity之间传递数据&批量传递数据
 * @author dr
 */
public class Demo1Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    
    public void click(View view){
        EditText et = (EditText) this.findViewById(R.id.et_activity01);
        String content = et.getText().toString().trim();
        
        Intent intent = new Intent(this,Demo2Activity.class);
        // intent.putExtra("cn.itcast.passdata.name", content);
        //基本数据类型 和基本数据类型的数组 我们都可以通过intent传递 
        
        // 批量传递数据
        Bundle bundle = new Bundle();
        bundle.putString("cn.itcast.passdata.name", content);
        
        intent.putExtras(bundle);
        
        startActivity(intent);
    }
}

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class Demo2Activity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main2);
        
        //获取到激活他的意图
        Intent intent = getIntent();
       // String name = intent.getStringExtra("cn.itcast.passdata.name");
         Bundle bundle =  intent.getExtras();
         String name =  bundle.getString("cn.itcast.passdata.name");
        
         TextView tv  =(TextView) this.findViewById(R.id.tv_activity02);
         tv.setText("你好 :"+name);
    }
}