Activity之间的数据传递: Intent

 

 

 

 

 

 

 

 

 

 

 

/**

       * 开启一个新的activity的方法

       *

       */

       public void selectContact(View view){

             Intent intent = new Intent(this,ListContactActivity .class );

             

             //开启新的activity  并且获取他的返回值.

            startActivityForResult(intent, 0);     //1.意图   2.请求码

          }

      

      

       /**

        * 得到返回结果的方法

        */

       @Override

          protected void onActivityResult( int requestCode, int resultCode, Intent data) {

             super.onActivityResult(requestCode, resultCode, data);

            

             if(data!= null){

                  String phone = data.getStringExtra( "phone");

                  

                   et_number.setText(phone);

            }

      

       }

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      /**

       * 设置listView中条目的点击事件

       */

      lv .setOnItemClickListener(new OnItemClickListener() {

                   @Override

                   public void onItemClick(AdapterView<?> parent, View view,

                               int position, long id) {

                        ContactInfo info = contactInfos.get(position);

                        String phone = info.getPhone();

                        

                        

                        Intent data = new Intent();

                        data.putExtra( "phone", phone);

                        setResult(0, data);          //设置返回的结果  返回给调用者   "0":结果码

                        finish();    //关闭Activity

                  }

            });