安卓：广播接收器时，插入/从USB端口删除设备的USB插头插入/ [英] Android: BroadcastReceiver when insert/remove the device USB plug into/from a USB port

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问题描述

我的应用程序不抓ACTION_USB_DEVICE_ATTACHED，而是ACTION_USB_DEVICE_DETACHED做工精细。
应用程序启动正常，如果我连接USB设备，但执行广播接收器右键抓ACTION_USB_DEVICE_DETACHED期间，我拔下。如果我再附上广播接收器不抓住任何东西。

  IntentFilter的过滤器=新的IntentFilter（）;
filter.addAction（UsbManager.ACTION_USB_DEVICE_ATTACHED）;
filter.addAction（UsbManager.ACTION_USB_DEVICE_DETACHED）;
rocrailService.registerReceiver（mUsbReceiver，过滤器）;
  //广播接收器，当插入/从USB端口删除设备的USB插头插入/
  广播接收器mUsbReceiver =新的广播接收器（）{
  公共无效的onReceive（上下文的背景下，意图意图）{
    字符串行动= intent.getAction（）;
    的System.out.println（广播接收器事件）;
    如果（UsbManager.ACTION_USB_DEVICE_ATTACHED.equals（动作））{
        mSerial.usbAttached（意向）;
        mSerial.begin（mBaudrate）;
        loadDefaultSettingValues​​（）;
        RUN =真实的;
        开始（）;
        的System.out.println（广播接收器USB连接）;    }否则如果（UsbManager.ACTION_USB_DEVICE_DETACHED.equals（动作））{
        mSerial.usbDetached（意向）;
        mSerial.end（）;
        RUN = FALSE;
        的System.out.println（广播接收器USB断开连接）;
    }
  }

和清单：

 ＆LT;清单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
包=net.DCCWLocoDisplay
安卓版code =0
安卓的versionName =0＆GT;＆LT;采用-SDK机器人：targetSdkVersion =12/＆GT;
＆LT;使用许可权的android：NAME =android.permission.INTERNET对/＆GT;
＆LT;使用许可权的android：NAME =android.permission.READ_PHONE_STATE/＆GT;
＆LT;使用许可权的android：NAME =android.permission.CHANGE_WIFI_MULTICAST_STATE/＆GT;
＆LT;使用许可权的android：NAME =android.permission.WRITE_SETTINGS/＆GT;
＆LT;使用许可权的android：NAME =android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;
＆LT;使用许可权的android：NAME =android.permission.ACCESS_NETWORK_STATE/＆GT;
＆LT;使用许可权的android：NAME =android.permission.ACCESS_WIFI_STATE/＆GT;＆lt;应用
    机器人：图标=@绘制/ DCCW
    机器人：标签=@字符串/ APP_NAME＆GT;
    ＆LT;活动机器人：图标=@绘制/ cab_64机器人：名字=net.DCCWLocoDisplay.activities.ActRCCab安卓主题=@风格/ FullHeightMainDialog机器人：标签=@字符串/ APP_NAME＆GT;
        ＆所述;意图滤光器＆gt;
            ＆lt;作用机器人：名字=android.intent.action.MAIN/＆GT;
            ＆LT;类机器人：名字=android.intent.category.LAUNCHER/＆GT;
        ＆所述; /意图滤光器＆gt;
        ＆所述;意图滤光器＆gt;
            ＆lt;作用机器人：名字=android.hardware.usb.action.USB_DEVICE_ATTACHED/＆GT;
        ＆所述; /意图滤光器＆gt;
            ＆LT;元数据机器人：名字=android.hardware.usb.action.USB_DEVICE_ATTACHED
               机器人：资源=@ XML / device_filter/＆GT;
    ＆LT; /活性GT;
    ＆LT;活动机器人：名字=net.DCCWLocoDisplay.activities.Act preferences机器人：主题=@风格/ FullHeightDialog/＆GT;
    ＆LT;活动机器人：名字=net.DCCWLocoDisplay.activities.ActAccessory安卓主题=@风格/ FullHeightDialog/＆GT;
    ＆LT;活动机器人：名字=net.DCCWLocoDisplay.activities.ActAbout安卓主题=@风格/ FullHeightDialog/＆GT;
    ＆LT;活动机器人：名字=net.DCCWLocoDisplay.activities.ActProgramming安卓主题=@风格/ FullHeightDialog/＆GT;
    ＆LT;活动机器人：名字=net.DCCWLocoDisplay.activities.ActSteps安卓主题=@风格/ FullHeightDialog/＆GT;
    ＆LT;服务机器人：名字=net.DCCWLocoDisplay.DCCWLocoDisplay/＆GT;
    ＆LT; /用途＆gt; ＆LT; /清单＆GT;

设备过滤器（我检查供应商和产品ID）：

 ＆LT;资源＆GT;
＆LT;  - 英语 - 澳大利亚​​/ 0x6001：FTDI FT232R UART  - ＆GT;
＆LT; USB设备厂商ID =1027产品ID =24577/＆GT; ＆所述;！ -  FT232RL  - ＆GT;
＆LT; /资源＆GT;


解决方案

一切正如上文所述，只是变化不大的作品！在我的应用程序标记研究singleTask没有帮助，但帮助，当我把它放在活动标签

 ＆LT;活动
...
机器人：launchMode =singleTask＆GT;

这为我提供了ANDROID开始发出onNewIntent到活动。和onNewIntent我刚刚从意图获取设备，具有出权限的任何请求：

  @覆盖
保护无效onNewIntent（意向意图）
{
    super.onNewIntent（意向）;
    如果（intent.getAction（）。等于（UsbManager.ACTION_USB_DEVICE_ATTACHED））
    {
        UsbDevice装置=（UsbDevice）intent.getParcelableExtra（UsbManager.EXTRA_DEVICE）;

My application don't catch "ACTION_USB_DEVICE_ATTACHED" but "ACTION_USB_DEVICE_DETACHED" work fine. Application start correctly if I connect usb device but I disconnect during execution BroadcastReceiver right catch "ACTION_USB_DEVICE_DETACHED". If I attach again BroadcastReceiver don't catch anything.

    IntentFilter filter = new IntentFilter();
filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
rocrailService.registerReceiver(mUsbReceiver, filter);


  // BroadcastReceiver when insert/remove the device USB plug into/from a USB port  
  BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
  public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    System.out.println("BroadcastReceiver Event");
    if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
        mSerial.usbAttached(intent);
        mSerial.begin(mBaudrate);
        loadDefaultSettingValues();
        Run=true;
        start();
        System.out.println("BroadcastReceiver USB Connected");

    } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
        mSerial.usbDetached(intent);
        mSerial.end();
        Run=false;
        System.out.println("BroadcastReceiver USB Disconnected");
    }
  }

And manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="net.DCCWLocoDisplay"
android:versionCode="0"
android:versionName="0" >

<uses-sdk android:targetSdkVersion="12"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>   
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

<application
    android:icon="@drawable/dccw"
    android:label="@string/app_name" >
    <activity android:icon="@drawable/cab_64" android:name="net.DCCWLocoDisplay.activities.ActRCCab" android:theme="@style/FullHeightMainDialog" android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
        </intent-filter>
            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" 
               android:resource="@xml/device_filter" />      
    </activity>
    <activity android:name="net.DCCWLocoDisplay.activities.ActPreferences" android:theme="@style/FullHeightDialog" />
    <activity android:name="net.DCCWLocoDisplay.activities.ActAccessory" android:theme="@style/FullHeightDialog" />
    <activity android:name="net.DCCWLocoDisplay.activities.ActAbout" android:theme="@style/FullHeightDialog" />
    <activity android:name="net.DCCWLocoDisplay.activities.ActProgramming" android:theme="@style/FullHeightDialog" />
    <activity android:name="net.DCCWLocoDisplay.activities.ActSteps" android:theme="@style/FullHeightDialog" />
    <service android:name="net.DCCWLocoDisplay.DCCWLocoDisplay"/>
    </application>

 </manifest>

Device filter (I check vendor and product id):

<resources>
<!-- 0x0403 / 0x6001: FTDI FT232R UART -->
<usb-device vendor-id="1027" product-id="24577" /> <!-- FT232RL -->
</resources>

解决方案

Everything works as was described above, except little changes! On my research singleTask in application tag didn't help, but helped when I put it in activity tag

<activity
...
android:launchMode="singleTask">

It provided me with ANDROID started to send onNewIntent to activity. And on onNewIntent I just had to get device from intent, with out any requests for permissions:

@Override
protected void onNewIntent(Intent intent)
{
    super.onNewIntent(intent);
    if(intent.getAction().equals(UsbManager.ACTION_USB_DEVICE_ATTACHED))
    {
        UsbDevice device  = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);

这篇关于安卓：广播接收器时，插入/从USB端口删除设备的USB插头插入/的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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