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);

     }

 }