android - 在一个 onActivityResult() 中处理来自多个活动的数据？

Question

我想知道是否可以处理来自活动 1 中的活动 2 和活动 3 的数据onActivityResult()，或者我是否需要为每个返回数据的活动提供一种方法？

活动 1 是应用程序的主要活动。

活动一：

// Handle return value from activity
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK) {
        String imageId = data.getExtras().getString("imageId");

        // Do something if data return from activity 2 ??

        // Do something if data return from activity 3 ??
    }
}

活动二

Intent intent = new Intent();
intent.putExtra("imageId", imagePath);
setResult(RESULT_OK, intent); 
finish();

活动 3

Intent intent = new Intent();
intent.putExtra("contactId", data);
setResult(RESULT_OK, intent);
finish();

Answer 1

startActivityForResult在您的活动 1中设置 requestCode ：

调用活动 2

Intent intent = new Intent(this, Activity2.class);
startActivityForResult(intent,10); 

调用活动 3

Intent intent = new Intent(this, Activity3.class);
startActivityForResult(intent,11); 

现在当你来onActivityResult检查时requestCode

像：

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

      super.onActivityResult(requestCode, resultCode, data);

       switch (requestCode) {

          case (10): 
          {
            // do this if request code is 10.
          }
          break;

          case (11):
          {
            // do this if request code is 11.
          }
          break;
  }

Answer 2

No confusion check result code and request code..

例子 ：

private static final int TWO = 2;
private static final int THREE = 3;

startActivityForResult(new Intent(this,Activity2.class),TWO); // one for Activity 2
startActivityForResult(new Intent(this,Activity3.class),THREE);

和

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK ) {
        if(requestCode == TWO) {
            // Activity two stuff
        } else if(requestCode == THREE) {
            // Activity three stuff
        }
    }
}