android - 堆栈中的多个 MapActivity

Question

我知道这个话题已经被讨论过几次了，而且对于拥有“多个”MapActivity 类的建议解决方案通常是在不同的进程中运行一个。我不想这样做，我有 3 个。

我重构了一个 MapActivity 子类以在 3 种不同模式下运行。

package com.rossgreenhalf.maptest.activity;

import android.os.Bundle;

import com.google.android.maps.MapActivity;

public class MyMapActivity extends MapActivity {

    @Override
    protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    /* Inflate xml view, Set Zoom etc */
    }

    @Override
    protected void onResume() {
        super.onResume();

        int mode = getIntent().getExtras().getInt("MAP_MODE");

        switch(mode){
        case 1:
            /* Some markers to show */
            break;
        case 2:
            /* Just one Marker */
            break;
        case 3: 
            /* Only showing my location */
            break;
        }
    }

    @Override
    protected boolean isRouteDisplayed() {
    return false;
    }
}

我允许 MapActivity 的多个实例驻留在任务堆栈中，因为它的启动模式仍设置为“标准”。这种方法似乎工作正常，我没有收到某些人似乎收到的连接池关闭消息，我有点困惑是否确实存在多个 MapActivity 实例，或者 android 是否自动重用一个实例？

但是我收到了这个错误，我不知道它有多严重:

01-25 10:14:54.433: ERROR/ActivityThread(5620): Activity com.rossgreenhalf.maptest.activity.MyMapActivity has leaked IntentReceiver com.google.android.maps.NetworkConnectivityListener$ConnectivityBroadcastReceiver@44981cf0 that was originally registered here. Are you missing a call to unregisterReceiver()?
01-25 10:14:54.433: ERROR/ActivityThread(5620): android.app.IntentReceiverLeaked: Activity com.rossgreenhalf.maptest.activity.MyMapActivity has leaked IntentReceiver com.google.android.maps.NetworkConnectivityListener$ConnectivityBroadcastReceiver@44981cf0 that was originally registered here. Are you missing a call to unregisterReceiver()?
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread$PackageInfo$ReceiverDispatcher.(ActivityThread.java:968)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread$PackageInfo.getReceiverDispatcher(ActivityThread.java:753)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:799)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:786)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:780)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:318)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at com.google.android.maps.NetworkConnectivityListener.startListening(MapActivity.java:163)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at com.google.android.maps.MapActivity.onResume(MapActivity.java:431)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at com.rossgreenhalf.maptest.activity.MyMapActivity.onResume(MyMapActivity.java:166)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1237)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.Activity.performResume(Activity.java:3864)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3315)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3340)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2158)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.os.Looper.loop(Looper.java:143)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at android.app.ActivityThread.main(ActivityThread.java:4914)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at java.lang.reflect.Method.invokeNative(Native Method)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at java.lang.reflect.Method.invoke(Method.java:521)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-25 10:14:54.433: ERROR/ActivityThread(5620):     at dalvik.system.NativeStart.main(Native Method)

我对此采取了正确的方法吗？我应该担心那个错误吗？

Answer 1

我遇到了同样的问题，搜索后我发现了这篇关于同样问题的帖子

https://novoda.lighthouseapp.com/projects/63622/tickets/157-leak-receiver-searchresult

这表明在您的应用程序中使用多个 map activity 时会出现问题。

所以在我的应用程序的 ma​​nifest.xml 文件中，我让每个 map Activity 在一个单独的进程中运行:

android:process=":p1"
android:process=":p2"

您可以在 Android 文档中阅读更多相关信息。 http://developer.android.com/guide/topics/manifest/activity-element.html#proc