android代码，如何拦截到NETWORK_NOT_FOUND_EVENT上报事件，并且发送广播出去

要拦截 `NETWORK_NOT_FOUND_EVENT` 事件并发送广播，你可以编写一个 BroadcastReceiver，并在其中注册 `NETWORK_NOT_FOUND_ACTION`。然后，你需要在你的应用程序中实现 `ConnectivityManager.NetworkCallback`，并在 `onLost` 回调方法中检查丢失的网络是否是 `NETWORK_NOT_FOUND_EVENT`。如果是，那么你就可以发送一个广播来通知你的应用程序。

下面是一个示例代码：

public class NetworkBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {
            ConnectivityManager connectivityManager =
                    (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
            if (networkInfo != null && networkInfo.isConnected()) {
                // 网络已连接
            } else {
                // 网络未连接
            }
        } else if ("android.net.wifi.STATE_CHANGE".equals(action)) {
            NetworkInfo networkInfo =
                    intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
            if (networkInfo != null && networkInfo.isConnected()) {
                // WiFi网络已连接
            } else {
                // WiFi网络未连接
            }
        } else if ("android.net.conn.CONNECTIVITY_CHANGE".equals(action)) {
            NetworkInfo networkInfo =
                    intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
            if (networkInfo != null && networkInfo.isConnected()) {
                // 网络已连接
            } else {
                // 网络未连接
            }
        } else if ("android.net.conn.NETWORK_CONDITIONS_MEASURED".equals(action)) {
            NetworkCapabilities networkCapabilities =
                    intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_CAPABILITIES);
            if (networkCapabilities != null) {
                boolean networkNotFound =
                        networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_FOUND);
                if (networkNotFound) {
                    // 发送广播
                    Intent networkNotFoundIntent = new Intent("com.example.NETWORK_NOT_FOUND_ACTION");
                    context.sendBroadcast(networkNotFoundIntent);
                }
            }
        }
    }
}

然后在你的 `AndroidManifest.xml` 文件中注册此广播接收器：

<receiver
    android:name=".NetworkBroadcastReceiver"
    android:enabled="true"
    android:exported="false">
    <intent-filter>
        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        <action android:name="android.net.wifi.STATE_CHANGE" />
        <action android:name="android.net.conn.NETWORK_CONDITIONS_MEASURED" />
    </intent-filter>
</receiver>

在你的应用程序中，你需要实现 `ConnectivityManager.NetworkCallback` 并在 `onLost` 回调方法中检查丢失的网络是否是 `NETWORK_NOT_FOUND_EVENT`。如果是，那么你就可以发送一个广播来通知你的应用程序。

public class MyNetworkCallback extends ConnectivityManager.NetworkCallback {

    private Context mContext;

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

    @Override
    public void onLost(Network network) {
        ConnectivityManager connectivityManager =
                (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkCapabilities networkCapabilities =
                connectivityManager.getNetworkCapabilities(network);
        if (networkCapabilities != null) {
            boolean networkNotFound =
                    networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_FOUND);
            if (networkNotFound) {
                // 发送广播
                Intent networkNotFoundIntent = new Intent("com.example.NETWORK_NOT_FOUND_ACTION");
                mContext.sendBroadcast(networkNotFoundIntent);
            }
        }
    }
}

最后，在你的应用程序中注册 `MyNetworkCallback`：

ConnectivityManager connectivityManager =
        (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
MyNetworkCallback networkCallback = new MyNetworkCallback(this);
connectivityManager.registerNetworkCallback(
        new NetworkRequest.Builder()
                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                .build(),
        networkCallback);