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);
     }
 }