java - 所有 Android 版本的 Android 互联网连接

Question

我正在寻找一种方法来检查和监听我的互联网连接，但由于最新的 Android 版本不支持在 Manifest 中注册广播，我正在寻找一种方法来实现适用于所有 Android 版本的东西。到目前为止我找不到任何解决方案。

我尝试将广播 Intent 过滤器添加到我的 list 文件中，但在较新的 Android 版本中不允许这样做。

<receiver
            android:name="utilities.NetworkStateChangeReceiver"
            android:exported="true"
            android:enabled="true"
            android:label="NetworkConnection" >
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                <action android:name="android.net.wifi.STATE_CHANGE"/>
            </intent-filter>
        </receiver>

<小时/>

public class NetworkStateChangeReceiver extends BroadcastReceiver {
    public static final String NETWORK_AVAILABLE_ACTION = "NetworkAvailable";
    public static final String IS_NETWORK_AVAILABLE = "isNetworkAvailable";

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent networkStateIntent = new Intent(NETWORK_AVAILABLE_ACTION);
        networkStateIntent.putExtra(IS_NETWORK_AVAILABLE, isConnectedToInternet(context));
        LocalBroadcastManager.getInstance(context).sendBroadcast(networkStateIntent);
    }

    private boolean isConnectedToInternet(Context context) {
        final ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

        boolean isMobile = false, isWifi = false;

        NetworkInfo[] infoAvailableNetworks = cm.getAllNetworkInfo();

        if (infoAvailableNetworks != null) {
            for (NetworkInfo network : infoAvailableNetworks) {

                if (network.getType() == ConnectivityManager.TYPE_WIFI) {
                    if (network.isConnected() && network.isAvailable())
                        isWifi = true;
                }
                if (network.getType() == ConnectivityManager.TYPE_MOBILE) {
                    if (network.isConnected() && network.isAvailable())
                        isMobile = true;
                }
            }
        }

        return isMobile || isWifi;
    }
}

<小时/>

我的接收器无法接收广播

Answer 1

我在 IntentFilter 中使用了几乎相同的逻辑，它对我来说效果很好，无需在 Manifest 文件中注册它。

界面:

public interface IReceiverStateChange {

    void register(BroadcastReceiver broadcastReceiver);
    void unregister(BroadcastReceiver broadcastReceiver);
}

实现:

public class NetworkReceiverStateChange implements IReceiverStateChange {

    private Context mContext;
    private Boolean mIsRegistered = false;

    public NetworkReceiverStateChange(Context context) {
        mContext = context;
    }

    @Override
    public void register(BroadcastReceiver broadcastReceiver) {
        if (!mIsRegistered) {
            IntentFilter netWorkIntentFilter = new 
            IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
            mContext.registerReceiver(broadcastReceiver, netWorkIntentFilter);
            mIsRegistered = true;
        }
    }

    @Override
    public void unregister(BroadcastReceiver broadcastReceiver) {
        if (mIsRegistered) {
            mContext.unregisterReceiver(broadcastReceiver);
            mIsRegistered = false;
        }
    }
}

注册所需的 Activity :

if (mNetworkStateChange == null) {
            mNetworkStateChange = new NetworkReceiverStateChange(this);
        }
        mNetworkStateChange.register(mNetworkBroadcastReceiver);

在onDestroy中取消注册:

if (mNetworkStateChange != null) {
            mNetworkStateChange.unregister(mNetworkBroadcastReceiver);
        }

广播接收器对象:

    //The CONNECTIVITY_ACTION broadcast seems to be sticky on some devices (even 
      though the documentation implies that it is not).
    // This means that when you register the receiver it will immediately call 
       onReceive() with the most recently sent broadcast.
private final BroadcastReceiver mNetworkBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (action != null && action.matches("android.net.conn.CONNECTIVITY_CHANGE")) {
                <DO SOMETHING>
            }
        }
    };

希望有帮助:)