清单中的飞机模式接收器？

Question

我正在开发一款Android应用程序,该应用程序将在工业环境中用作手持控制器.为了让平板电脑不太适合带回家,我打算一直尝试以编程方式打开飞机模式但是在4.2中已经弃用了,这也是我们用来安装Android Open Accessory的版本.但是我想如果我可以在清单中注册一个接收器,以便它可以在任何时候更改飞行模式时启动我的应用程序,然后检查它是否已关闭并提示用户重新打开它.

我尝试了以下解决方案,也找到了这个问题的答案.

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<receiver android:name=".receiver.ConnectivityReceiver">
<intent-filter>
    <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>

我也试过这段代码:

<receiver android:enabled="true" android:name=".ConnectivityReceiver">
<intent-filter>
    <action android:name="android.intent.action.SERVICE_STATE"/>
</intent-filter>
</receiver>

在这里也被saxos发现为aswer .

现在这些解决方案都不会导致我的应用程序在飞行模式改变时启动.

是否可以在清单文件中注册BroadcaseReceiver for Airplane Mode并让该意图启动应用程序？

编辑1:我确实在java代码中使用了BroadcastReceiver,以便在我的应用程序处于活动状态时检测到这种情况.这不是我想要的.谢谢.

编辑2:这是我目前的整个清单文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.i2c"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="17"
    android:targetSdkVersion="17" 
    android:maxSdkVersion="17"/>
    <!-- SDK 14 = 4.0 ICS
         SDK 17 = 4.2 JB -->             

<!-- Assures software is not loaded onto unsupported screen size, i.e. phones -->
<supports-screens android:xlargeScreens="true"
    android:largeScreens="true"
    android:normalScreens="false"
    android:smallScreens="false"
    android:anyDensity="true"/>

<uses-feature android:name="android.hardware.usb.accessory"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.i2c.mainActivity"
        android:label="@string/app_name"  
        android:configChanges="keyboardHidden|orientation|screenSize"
        android:launchMode="singleTask">
        <intent-filter>
            <action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"/>
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.AIRPLANE_MODE" />
        </intent-filter>
        <meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
            android:resource="@xml/accessory_filter"/>
    </activity>
</application>

在USB_ACCESSORY ATTACHED与MAIN发射器的工作就好了,并开始从我的应用onCreate点.然而,AIRPLANE_MODE似乎没有做任何事情.

这是我的BroadcastReceiver,它在java代码中:

    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d("I2CActivity", "onReceive of BroadcastReceiver()");
        String action = intent.getAction();
        if(ACTION_USB_PERMISSION.equals(action)) {
            Log.d("ACTION_USB_PERMISSION", action.toString());
            synchronized (this) {
                Log.d("syncronized", this.toString());
                UsbAccessory accessory = (UsbAccessory) intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
                if(intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
                    if (accessory != null) {
                        OpenAccessory(accessory);
                    }
                }
                else {
                    Log.d("mUsbReceiver", "permission denied for accessory " + accessory);
                }
            }
        }
        else if(UsbManager.ACTION_USB_ACCESSORY_ATTACHED.equals(action)) {
            Log.d("ACTION_USB_ACCESSORY_ATTACHED", action.toString());
            UsbAccessory accessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
            if (accessory != null) {
                resumeAccessory();
            }
        }
        else if(UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
            Log.d("ACTION_USB_ACCESSORY_DETACHED", action.toString());
            UsbAccessory accessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
            if (accessory != null) {
                closeAccessory();
            }
        }
        else if(Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) {
            Log.e("Airplane Mode", "Airplane mode changed");
            airplaneMode = Settings.Global.getInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
        }
    }
};

但是根据我的理解,这仅在应用程序运行时注册,我想要一个即使在应用程序未运行时注册的接收器.

Answer 1

通过更好地理解IntentsXML定义的接收器,我能够解决这个问题.这仅在API 17上进行了测试.以下是清单的代码:

<receiver android:name="com.example.i2c.AirplaneModeReceiver">
     <intent-filter>
         <action android:name="android.intent.action.AIRPLANE_MODE"/>
     </intent-filter>
</receiver>

然后创建一个名为AirplaneModeReceiver的java类文件,并在其中添加以下内容:

public class AirplaneModeReceiver extends BroadcastReceiver {
   public void onReceive(Context context, Intent intent) {
       Intent startActivityIntent = new Intent(context, MainActivity.class);
       startActivityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
       context.startActivity(startActivityIntent);
   }    
}

现在,只要飞机模式发生变化,无论是打开还是关闭,这都将启动活动.我没有编写代码来检查飞行模式是否已关闭,然后再切换到主屏幕启动器样式应用程序,然后再开始活动.

Answer 2

这是接收器的片段

public void onReceive(Context context, Intent intent) {
        if (intent.getAction().intern() == Intent.ACTION_AIRPLANE_MODE_CHANGED) {
// Launch your app here
}