Android Intent实现页面跳转

 

Intent可以来协助完成Android各个组件之间的通信

 

1：startActivity(intent);     //直接启动

               /*

               * 通过监听点击事件跳转套第二个activity

               */

               button=(Button) findViewById(R.id. button1);

               button.setOnClickListener( new OnClickListener() {

                      @Override

                      public void onClick(View v) {

                           Intent intent= new Intent(MainActivity.this ,myactivity.class);

                            //通过startactivity的方式实现

                           MainActivity. this.startActivity(intent);

                     }

              });

 

2：startActivityForResult(intent,requestCode);     //启动之后有返回值，需要关联onActivityResult（A页面使用），setResult（B页面使用）两个方法。

     onActivityResult(int requestCode,int resultCode,Intent data)    

     setResult(resultCode,data);

button2=(Button) findViewById(R.id.button2);

               button2.setOnClickListener( new OnClickListener() {

                     

                      @Override

                      public void onClick(View v) {

                            // TODO Auto-generated method stub

                           Intent intent= new Intent(MainActivity.this ,myactivity.class);

                            /*

                            * 第一个参数是intent对象

                            * 第二个参数是请求的标识

                            */

                           startActivityForResult(intent, 1);

                     }

              });

 

 

 

      /**

        * 通过startActivityForResult跳转，接受返回数据的方法

        * requestCode：请求的标识

        * resultCode 第二个页面返回的标识

        * data 第二个页面回传的数据

        */

        @Override

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

               super.onActivityResult(requestCode, resultCode, data);

               if(requestCode==1&&resultCode==2){

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

              }

       }