Question

我想从我的MainActivity将一个arraylist传递给CheckRunningApplicationReceiver.class（广播接收器）。 CheckRunningApplicationReceiver.class是从另一个名为StartupReceiver的广播Receiver中调用的，它每隔5秒由一个警报管理器调用。我是否需要先将arraylist传递给StartupReceiver，然后再从那里传递给CheckRunningApplicationReceiver？或者有没有办法直接从MainActivity传递给CheckRunningApplicationReceiver？

StartupReceiver.class

public class StartupReceiver extends BroadcastReceiver {

static final String TAG = "SR";

final int startupID = 1111111;


@Override
public void onReceive(Context context, Intent intent) {

    // Create AlarmManager from System Services
    final AlarmManager alarmManager = (AlarmManager) context
                .getSystemService(Context.ALARM_SERVICE);
    try{
            // Create pending intent for CheckRunningApplicationReceiver.class 
            // it will call after each 5 seconds

            Intent i7 = new Intent(context, CheckRunningApplicationReceiver.class);






            PendingIntent ServiceManagementIntent = PendingIntent.getBroadcast(context,
                    startupID, i7, 0);
            alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME,
                    SystemClock.elapsedRealtime(), 
                    1000, ServiceManagementIntent);


        } catch (Exception e) {
            Log.i(TAG, "Exception : "+e);
        }

    }

}

CheckRunningApplicationReceiver.class 公共类CheckRunningApplicationReceiver扩展了BroadcastReceiver {

public final String TAG = "CRAR"; // CheckRunningApplicationReceiver

String package_name; ConnectivityManager dataManager;

@Override
public void onReceive(Context aContext, Intent anIntent) {


    dataManager  = (ConnectivityManager)aContext.getSystemService(aContext.CONNECTIVITY_SERVICE);
     Method dataMtd = null;
     try {
         dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
     } catch (NoSuchMethodException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
     }
     dataMtd.setAccessible(true);

     try {

        // Using ACTIVITY_SERVICE with getSystemService(String) 
        // to retrieve a ActivityManager for interacting with the global system state.

        ActivityManager am = (ActivityManager) aContext
                .getSystemService(Context.ACTIVITY_SERVICE);

        // Return a list of the tasks that are currently running, 
        // with the most recent being first and older ones after in order.
        // Taken 1 inside getRunningTasks method means want to take only 
        // top activity from stack and forgot the olders.

        List<ActivityManager.RunningTaskInfo> alltasks = am
                .getRunningTasks(1);




        // 
        for (ActivityManager.RunningTaskInfo aTask : alltasks) {





                     // When user on call screen show a alert message





                     if (aTask.topActivity.getClassName().equals("com.android.mms.ui.ConversationList")
                             || aTask.topActivity.getClassName().equals("com.android.mms.ui.ComposeMessageActivity"))
                     {
                         // When user on Send SMS screen show a alert message
                         try {
                             dataMtd.invoke(dataManager, false);
                         } catch (IllegalArgumentException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                         } catch (IllegalAccessException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                         } catch (InvocationTargetException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                         }   
                     }







        }

    } catch (Throwable t) {
        Log.i(TAG, "Throwable caught: "
                    + t.getMessage(), t);
    }

}

MainActivity.class

@Override
protected void onResume()
{   
    // TODO Auto-generated method stub
getBaseContext().getApplicationContext().sendBroadcast(
                new Intent("StartupReceiver_Manual_Start"));//to start StartupReceiver     

    super.onResume();
}

清单

<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.javatechig.listapps.AllAppsActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>


      <activity
        android:name="com.javatechig.listapps.Adblock"
        android:label="@string/app_name" >

    </activity>


    <receiver android:name=".StartupReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="StartupReceiver_Manual_Start" />
        </intent-filter>
    </receiver>

    <receiver android:name = ".CheckRunningApplicationReceiver"/>

   </application>

Answer 1

使用putParcelableArrayListExtra()将列表放入Intent和getParcelableArrayListExtra()以获取Intent的列表。

是的，您需要将其从Activity传递到第一个BroadcastReceiver，然后将其从传入的Intent复制到用于传递的Intent触发第二个BroadcastReceiver。

Answer 2

我所做的是用户选择特定的应用程序，因此我将这些选定的应用程序存储在arraylist中并使用共享首选项存储它。使用报警管理器每1秒调用一次启动广播接收器，该报警管理器调用checkrunningapps广播接收器。在这里，我检索存储的arraylist并将其与当前的前景应用程序进行比较，并做我想做的任何事情，如应用程序锁和东西。但问题是它每秒都检索到arraylist并检查它。因为这个，应用程序有点滞后。我是android的新手。我认为我的方法是错误的。我也尝试使用服务，但在服务onstart命令中代码只执行一次，因此它只检查当前正在运行的应用程序与arraylist一次，即使该服务无限期地处于后台。请告诉我使用后台服务的正确方法。请给我发送代码。我经常搜索但没有运气。我希望该服务只获取arraylist一次，并将其与当前正在运行的应用程序永远进行比较。

如何将Arraylist从活动传递到广播接收器到另一个广播接收器

2 个答案: