为什么导致startActivityForResult来之前活动真正开始？ [英] Why does result from startActivityForResult come before activity really starts?

问题描述

我有以下的code键启动活动：

I have the following code to start activities:

public boolean onOptionsItemSelected(final MenuItem item) { 
    super.onOptionsItemSelected(item);
    switch (item.getItemId()) {
    case MENU_PREFS:
        startActivityForResult(new Intent(this, PreferencesActivity.class),1);
            break;
    case MENU_ABOUT:
        startActivityForResult(new Intent(this, AboutActivity.class),2);
            break;
        }
    return false;
    }

和以下赶上结果：

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

        switch (requestCode){

        case 1:

        case 2:
            if (resultCode==RESULT_CANCELED)
                finish();
        }

但onActivityResult活动之前触发（对于结果）开始。它的工作原理很奇怪。首先，它retuns结果与相应的请求code（1或2我的情况）与结果code = 0，所以我的主要活动结束。而这相应的活动（结果）真正开始之后。 WTH？

but onActivityResult triggers before activity (for result) starts. It works weird. First it retuns result with corresponding requestCode (1 or 2 in my case) with resultCode=0 so my main activity finishes. And right after that corresponding activity (for result) really starts. WTH?

推荐答案

这是一个已知问题或功能的Andr​​oid系统。请参见这线涵盖类似问题

It is a know issue or feature in Android. See this thread which covers similar problem

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