首页 > 代码库 > Activity(2. 跳转)

Activity(2. 跳转)

Activity的跳转有两种方式:

  • 普通跳转:
Intent intent = new Intent(MainActivity.this, SecondActivty.class);startActivity(intent);
  • 带返回值的跳转:
    • 调用startActivityForResult,参数带请求索引
public static final int REQUEST_SEC = 1; //请求的IDIntent backIntent = new Intent(MainActivity.this, SecondActivty.class);startActivityForResult(backIntent, REQUEST_SEC);
    • 接收端Activity处理该跳转请求
Intent intent = new Intent();intent.putExtra("value", "hello word");intent.putExtra("input", MainActivity.REQUEST_SEC);setResult(RESULT_BACK,intent);finish();//返回前调用finish,销毁本activity,类似于back
    • 在MainActivity中处理返回
    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);                Log.i(TAG_ACTIVITY, "requestCode:" + requestCode);        Log.i(TAG_ACTIVITY, "resultCode:"  + resultCode);                if(resultCode == SecondActivty.RESULT_BACK && REQUEST_SEC == requestCode){            Toast.makeText(getApplicationContext(), data.getStringExtra("value"),                     Toast.LENGTH_SHORT).show();        }    }

 

Activity(2. 跳转)