Question

好的，我无缘无故地收到此错误。因为我的应用程序启动，一切正常。但是当它想要发送HTTP请求时它崩溃并且logcat显示这个错误。

我只在真实设备上收到此错误，它在模拟器中运行良好。

我的应用确实不需要这样的权限。这很简单。我知道我在代码中做错了，这与这些权限无关。但我无法弄清楚我在哪里做错了。

这是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ir.Ava.android"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="5"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>


    <application
        android:allowBackup="false"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/Theme.Avatheme" 
        android:uiOptions="splitActionBarWhenNarrow" android:supportsRtl="true">
        <!-- Splash screen -->
        <activity
            android:name="ir.Ava.android.SplashScreen"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Black.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- Main activity -->
        <activity
            android:name="ir.Ava.android.MainActivity"
            android:label="@string/app_name" >
        </activity>
        <activity android:name="ir.Ava.android.Bubble"></activity>
    </application>

</manifest>

这是导致问题的片段：

inside MainActivity.java

public static class profileSectionFragment extends Fragment {

    TextView testText;
    // flag for Internet connection status
    Boolean isInternetPresent = false;
    Button editPFButton;
    // Connection detector class
    ConnectionDetector cd;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.profile, container, false);
        ((TextView) rootView.findViewById(R.id.pf_username)).setText("Name of the user");
        testText = (TextView) rootView.findViewById(R.id.testText);

        // Buttons
        editPFButton = (Button) rootView.findViewById(R.id.edit_profile);

        editPFButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {

                Context appContext = getActivity().getApplicationContext();

                // creating connection detector class instance
                cd = new ConnectionDetector(appContext);

                // get Internet status
                isInternetPresent = cd.isConnectingToInternet();



                // check for Internet status
                if (isInternetPresent) {
                    testText.setText("successfully connected to the internet");
                } else {
                    testText.setText("there is no internet connection");
                }


                // Creating HTTP client
                HttpClient httpClient = new DefaultHttpClient();
                // Creating HTTP Post
                HttpPost httpPost = new HttpPost(
                        "http://192.168.1.2/android/");

                // Building post parameters
                // key and value pair
                List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
                nameValuePair.add(new BasicNameValuePair("email", "user@gmail.com"));
                nameValuePair.add(new BasicNameValuePair("message",
                        "Hi, trying Android HTTP post!"));

                // Url Encoding the POST parameters
                try {
                    httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
                } catch (UnsupportedEncodingException e) {
                    // writing error to Log
                    e.printStackTrace();
                }

                // Making HTTP Request
                try {
                    HttpResponse response = httpClient.execute(httpPost);
                    Log.d("HTTP Response:", response.toString());

                     if (response.getStatusLine().getStatusCode() == 200)
                     {
                         HttpEntity entity = response.getEntity();
                         testText.setText(EntityUtils.toString(entity));
                     }
                     else
                     {
                         testText.setText("Error: "+response.getStatusLine().getStatusCode());
                     }

                } catch (ClientProtocolException e) {
                    // writing exception to log
                    e.printStackTrace();
                } catch (IOException e) {
                    // writing exception to log
                    e.printStackTrace();

                }

            }
        });


        return rootView;
    }

}

Answer 1

不允许在主（UI）线程上进行网络I / O.您应该使用AsyncTask代替。例如：

final TextView testText = ...

AsyncTask<Void, Void, String> task = new AsyncTask<Void, Void, String>()
{
    @Override
    protected String doInBackground(Void... params)
    {
        ... Create HTTP client, and everything as before ...

        // Making HTTP Request
        HttpResponse response = httpClient.execute(httpPost);
        Log.d("HTTP Response:", response.toString());

        if (response.getStatusLine().getStatusCode() == 200)
        {
            HttpEntity entity = response.getEntity();
            return EntityUtils.toString(entity);
        }
        else
        {
            return "Error: "+response.getStatusLine().getStatusCode();
        }
    }

    @Override
    protected void onPostExecute(String result)
    {
        testText.setText(result);
    }
};

task.execute();

这无需任何理由需要android.permission.INTERACT_ACROSS_USERS_FULL

1 个答案: