致命例外：AsyncTask #1，如果飞行模式已激活

Question

我使用 AsyncTask 对我的服务器进行获取请求。如果我连接到互联网，Everythink 工作正常，但如果我激活飞行模式，我会遇到致命异常：

01-11 16:01:56.602 3456-3456/com.me.myapp E/ApiHelper: Error at 
getting WuerdestDu Stats. Id: 19
01-11 16:01:56.603 3456-3522/com.me.myapp E/AndroidRuntime: FATAL 
EXCEPTION: AsyncTask #1
                                                               Process: com.me.myapp, PID: 3456

奇怪的是，这是 Logcat 的完整错误日志，详细模式，没有过滤器。

这是我使用 AsyncTask 的地方：

try {
    response = new ApiGetHelper().execute(path).get();
} catch (Exception e) {
    Log.e(TAG, "Error at getting WuerdestDu Stats. Id: " + question.getId(), e);
}

这是我的 AsyncTask：

public class ApiGetHelper extends AsyncTask<String, String, String> {
private final static String TAG = ApiGetHelper.class.getSimpleName();

@Override
protected String doInBackground(String... strings) {
    String urlString = strings[0];

    try {
        URL url = new URL(urlString);
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.connect();

        int responseCode = urlConnection.getResponseCode();
        if (responseCode >= 200 && responseCode < 300) {
            Log.i(TAG, "Response: " + urlConnection.getResponseCode() + ": " + urlConnection.getResponseMessage());
        } else {
            Log.e(TAG, "Response: " + urlConnection.getResponseCode() + ": " + urlConnection.getResponseMessage());
        }

        return ApiUtils.readResponseAsString(urlConnection.getInputStream());
    } catch (MalformedURLException e) {
        throw new IllegalStateException("URL-ERROR", e);
    } catch (IOException e) {
        throw new IllegalStateException("IO-ERROR", e);
    }
}
}

Answer 1

如果您打开飞行模式，您将失去互联网，您需要在尝试 post 连接到您的服务器之前检查是否有可用的互联网连接。

像下面这样的东西应该可以解决问题

private boolean isNetworkConnected() {
  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

  return cm.getActiveNetworkInfo() != null;
 }

参考：Android check internet connection

致命例外：AsyncTask #1，如果飞行模式已激活

FATAL EXCEPTION: AsyncTask #1, if airplane mode is activated

java

android

fatal-error

android-asynctask