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如何处理来自搜索管理器的回调?

android-searchmanager android-intent android-activity android

Sheehan Alam · 技术社区 · 15 年前

假设如下:

Activity A calls Search Manager
User searches, and search results are displayed in Activity B
User clicks on a list item in Activity B 
App switches back to Activity A

我无法处理从活动B到活动A的回调,因为我没有搜索管理器的意图(我想?)。

呼叫搜索经理(在活动A中)

public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
        case R.id.add_symbol:
            onSearchRequested(); //result of search will show Activity B
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> a, View v, int position, long id) {
                Quote myQuote = new Quote();
                myQuote.name = (companies.get(position).name);
                myQuote.symbol = (companies.get(position).symbol);

                //TODO: add new quote to master quote list in Main
                //TODO: serialize in Main
                //TODO: go back to last activity

                Intent myIntent = new Intent(getApplicationContext(), Main.class);
                startActivityForResult(myIntent, PICK_COMPANY_REQUEST);
            }
        });

在活动A中,处理回拨:

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == PICK_COMPANY_REQUEST) {
            if (resultCode == RESULT_OK) {
                Toast toast = Toast.makeText(getApplicationContext(), "Stock added", Toast.LENGTH_SHORT);
                toast.show();
            }
        }
    }

PICK_COMPANY_REQUEST

从未调用onActivityResult()。为什么?

3 回复 | 直到 15 年前

DeRagan 15 年前

我真的怀疑你是否需要为你在onclickListener上的主要活动调用一个新的意图。因为活动已经在堆栈中了,所以您可以直接完成它

listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> a, View v, int position, long id) {
                Quote myQuote = new Quote();
                myQuote.name = (companies.get(position).name);
                myQuote.symbol = (companies.get(position).symbol);

                //TODO: add new quote to master quote list in Main
                //TODO: serialize in Main
                //TODO: go back to last activity

               //You need to use setresult here and pass the intent
                setResult(RESULT_OK, myIntent );
                finish();
            }
        });

Community Mohan Dere 8 年前

我贴出了一个答案,我认为是在同一个问题 Android onSearchRequested() callback to the calling activity

天空是对的 onActivityResult 未调用,因为活动A未启动搜索结果的活动。

为了解决这个问题,我将活动A也定义为可搜索的活动(在清单中),这样它就可以接收搜索意图,然后手动启动活动B startActivityForResult ,传入查询并让活动B正常处理搜索。

你可以在上面的链接看到我的回复,或者我有一个 more detailed write-up in this blog post .