在的onActivityResult动作条的后退按钮被点击时不叫 [英] onActivityResult is not called when the back button in ActionBar is clicked

问题描述

下面是我的问题：

1. 创建MainActivity。添加一个按钮，将启动另一个活动SecondActivity。

1. Create a MainActivity. Add a button which will start another activity SecondActivity.

        Intent i = new Intent(getActivity(),SecondActivity.class);
        startActivityForResult(i,0);

在SecondActivity，我捕捉到后退按钮单击事件，并添加一个按钮返回到第一个活动。

Inside the SecondActivity, I capture the back button click event and also add a button to return to the first Activity.

当在操作栏中的后退按钮被点击：

When back button in action bar is clicked:

@覆盖

public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
        case android.R.id.home:
            // back button
            Intent resultIntent = new Intent();
            // TODO Add extras or a data URI to this intent as appropriate.
            setResult(Activity.RESULT_OK, resultIntent);
            //finish();
            return false;

    }
    return super.onOptionsItemSelected(item);
}

在活动里面的按钮被点击：

When the button inside activity is clicked:

Button btn = (Button)this.findViewById(R.id.button2);
btn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent resultIntent = new Intent();
        // TODO Add extras or a data URI to this intent as appropriate.
        setResult(Activity.RESULT_OK, resultIntent);
        finish();
    }
});

当我点击SecondActivity里面的按钮MainActivity中的onActivityResult被调用，但如果我点击SecondActivity的ActionBar中的后退按钮从来没有被调用。谁能告诉我为什么？谢谢

The onActivityResult in MainActivity is called when I click the button inside the SecondActivity, but it's never been called if I click the back button in Actionbar of SecondActivity. Can anybody tell me why? Thanks

推荐答案

下面是code这是工作的：

Here is the code which is working:

public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
        case android.R.id.home:
            // back button
            Intent resultIntent = new Intent();
            setResult(Activity.RESULT_OK, resultIntent);
            finish();
            return true;

    }
    return super.onOptionsItemSelected(item);
}

我想结束（）将关闭当前的活动，并返回true将该行动告知已被处理。 （默认回动作似乎是从完成（）不同）。

I guess the finish() will close the current Activity, and return true inform that action has been processed. (The default back action seems to be different from finish().)

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