StartActivityForResult的使用

实现从Activity1打开Activity2。当Activity2关闭的时候，我们需要它返回一些数据给Activity1

 

1.Activity1:

 

private int REQUEST_CODE = 0;

//启动Activity2
rlSettingIcon.setOnClickListener(new OnClickListener() {
			
			public void onClick(View v) {

				Intent intent = new Intent();
				
				intent.setClass(Activity1.this, Activity2.class);
				
				startActivityForResult(intent, REQUEST_CODE);//REQUEST_CODE
是一个必须大于或等于0的整数，不知道为什么...
				
			}
		});

//从Activity2返回的时候，靠这个方法接收数据
@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data)
	{
		super.onActivityResult(requestCode, resultCode, data);  
		System.out.println("onActivityResult------------");
		 if(requestCode == REQUEST_CODE)
		 {  
			   if(resultCode == RESULT_OK)
			   {  
			    Bundle extras = data.getExtras();  
			    if (extras != null)
			    {  
			    	if(extras.getString("name").equals(""))//设置姓名
			    	{
			    		tvName.setText("未命名"); 
			    	}
			    	else
			    	{
			    		tvName.setText(extras.getString("name"));
			    	}   	
	
			  }  
	}

 

 

2.Activity2

 

btnOk.setOnClickListener(new OnClickListener() {
			
			public void onClick(View v) {
                
                Bundle bundle = new Bundle();
                bundle.putString("name", etName.getHint().toString());
                Intent intent = new Intent();
                intent.putExtras(bundle);//用Intent保存对象
                setResult(RESULT_OK, intent);
                finish();
                
			}
		});