Android:startActivityForResult 不调用 onActivityResult

Question

我的设置

• 在自己的进程中运行的服务，CentralService
• 调用 startActivityForResult()、MainActivity 的 Activity
• 正在为结果启动的 Activity ReturnResultActivity

---

我想做什么

1. 启动 ReturnResultActivity 并将其绑定(bind)到服务(注册其处理程序)
2. 让任何其他想要运行的 Activity 运行
3. 当它收到来自服务的消息时:
   • 与服务解除绑定(bind)
   • 完成()
   • 设置结果()
     1. 调用 MainActivity 的 onActivityResult() 方法

使用 Log.i 我已经确认步骤 1 到 3 发生了。但是，当应该调用 onActivityResult() 方法时，我在日志中得到以下信息:

V/ActivityManager(   60): Finishing activity: token=HistoryRecord{442cc518 com.myActivity/.primitives.ReturnResultActivity}, result=3, data=Intent { (has extras) }
V/ActivityManager(   60): Adding result to HistoryRecord{442a3988 com.mainActivity.sample/.MainActivity} who=null req=500 res=3 data=Intent { (has extras) }

---

附加信息

每个实体都在一个单独的项目中(我有 3 个项目相互交互)，因此它们都在自己的进程中运行。

MainActivity 使用以下代码从服务启动:

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.setClassName(activityInfo.packageName, activityInfo.name);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK 
          | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
startActivity(intent);

---

部分代码

返回结果 Activity :

public class ReturnResultActivity extends SomeActivity {
    private static final boolean DEBUG = true;
    private static final String TAG = "ReturnResultActivity";

    protected void onBind() {
        // We want to monitor the service for as long as we are
        // connected to it.
        Message msg = Message.obtain(null,
                CentralService.MSG_LISTEN);
        msg.replyTo = mMessenger;

        try {
            mService.send(msg);
        } catch (RemoteException e) {
            // In this case the service has crashed before we could even
            // do anything with it; we can count on soon being
            // disconnected (and then reconnected if it can be restarted)
            // so there is no need to do anything here.
            e.printStackTrace();
        }
    }

    /** this method is called eventually after doUnbindService is called **/
    protected void onUnbind() {
        if (DEBUG) Log.i(TAG, "Unbinding and finishing"); //I can tell this gets called when I run it
        if (data != null) {
            setResult(CentralService.MSG_SPEECH_RECOGNIZED, data);
        }
        finish();
    }

    Intent data;
    protected boolean receiveMessage(Message msg) {
        if (DEBUG) Log.i(TAG, "Incoming Message to Listener: " + msg.what);

        switch (msg.what) {
            case ASRManager.MSG_SPEECH_RECOGNIZED:
                data = new Intent();
                Bundle bundle = msg.getData();
                bundle.setClassLoader(getClassLoader());
                data.putExtra(ASRManager.TOKEN_PARCEL_KEY, bundle.getParcelable(ASRManager.TOKEN_PARCEL_KEY));
                if (DEBUG) Log.i(TAG, "Received speech, setting result.");
                doUnbindService();

                return true;
            default:
                return false;
        }
    }


}

主要 Activity

public class MainActivity extends CustomActivity {
    private static final boolean DEBUG = true;
    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent intent = new Intent("com.custom.returnresultaction");
        startActivityForResult(listenIntent, 500);

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (DEBUG) Log.i(TAG, "Got activity result " + resultCode); //this doesn't get called

    }
}

我的 LogCat 窗口中没有显示堆栈跟踪。请帮忙!

编辑有趣的新信息。如果我随后从启动器启动 MainActivity，我会在 logcat 中看到以下内容:

I/ActivityManager(   60): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.mainActivity.sample/.MainActivity }
V/ActivityManager(   60): Sending result to HistoryRecord{44253568 com.android.launcher/com.android.launcher2.Launcher} (index -1)
I/ActivityManager(   60): Starting Activity Unchecked Locked
V/ActivityManager(   60): com.mainActivity.sample.MainActivity Audio Activity Found
V/ActivityManager(   60): Delivering results to HistoryRecord{442c0310 com.mainActivity.sample/.MainActivity}: [ResultInfo{who=null, request=500, result=3, data=Intent { (has extras) }}]
V/ActivityThread(  327): Handling send result to ActivityRecord{440de270 token=android.os.BinderProxy@440ddca0 {com.mainActivity.sample/com.mainAcitivty.sample.MainActivity}}
V/ActivityThread(  327): Delivering result to activity ActivityRecord{440de270 token=android.os.BinderProxy@440ddca0 {com.mainActivity.sample/com.mainActivity.sample.MainActivity}} : ResultInfo{who=null, request=500, result=3, data=Intent { (has extras) }}
I/MainActivity(  327): Got activity result 3

我的理论是包含 MainActivity 的任务没有运行，因为消息是从 CentralService 接收到的。有什么想法吗？知道如何切换到正确的任务。 (请注意，尽管这似乎是不好的做法并且会破坏用户切换任务并将另一个 Activity 带到最前沿，但这是我想要做的。这是因为这最终将在自定义版本的 android 上运行，这将使所有这不会造成破坏。)

Answer 1

2 年后回到这个问题，问题是因为该 Activity 是在新任务中启动的。 (我在开火的 Intent 中设置了这个)。为立即在新任务中启动的结果启动 Activity 将返回 -1。