Question

我想创建一个应用程序，用户可以通过简单的表单提交他的信息。现在，如果用户没有连接到互联网，那么它应该缓存数据，每当用户连接到互联网时，就会开始上传该数据，而不会通知用户。

任何帮助？

Answer 1

使用此Receiver，它将帮助您在设备在线时提交表单

public class NetworkChangeReceiver extends BroadcastReceiver{

    private static final String LOG_TAG = "NetworkChangeReceiver";
    private boolean isConnected = false;

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.v(LOG_TAG, "Receieved notification about network status");
        isNetworkAvailable(context);
    }

    private boolean isNetworkAvailable(Context context) {
        ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity != null) {
            NetworkInfo[] info = connectivity.getAllNetworkInfo();
            if (info != null) {
                for (int i = 0; i < info.length; i++) {
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                        if (!isConnected) {
                            Log.v(LOG_TAG, "Now you are connected to Internet!");
                            Toast.makeText(context, "Internet available via Broadcast receiver", Toast.LENGTH_SHORT).show();
                            isConnected = true;
                            // do your processing here ---
                            // if you need to post or get any data to the server 
                        }
                        return true;
                    }
                }
            }
        }
        Log.v(LOG_TAG, "You are not connected to Internet!");

        isConnected = false;
        return false;
    }


}

让我知道它是否适用于您或此处的任何其他问题。

Answer 2

您可以创建可以捕获网络更改并启动上传服务的BroadcastReceiver：

public class NetworkReceiver extends BroadcastReceiver {
    public static final String EXTRA_DATA_NAME_NETWORK_CONNECTED = "my.package.name.NetworkConnected";

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {
            Intent serviceIntent = new Intent(UploadService.ACTION_NETWORK_STATUS, null, context, UploadService.class);
            serviceIntent.putExtra(EXTRA_DATA_NAME_NETWORK_CONNECTED, isNetworkConnected(context));
            context.startService(serviceIntent);
        }
    }
}

网络连接方法：

public static boolean isNetworkConnected(Context context) {
        ConnectivityManager conn = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = conn.getActiveNetworkInfo();

        return networkInfo != null && networkInfo.isConnected();
}

当设备连接到互联网时，我如何提交表单

2 个答案: