Android application without GUI

StackOverflow https://stackoverflow.com/questions/21772458

Question

I have been developing a simple application without UI using broadcast receiver.

The app doesn't contain any ACTIVITIES.

I have given necessary permissions.

I took the code from this url:http://developerandro.blogspot.in/2013/09/check-internet-connection-using.html

The app shows a toast "Not connected to internet" when I click change wifi state. It's working correctly.

But my question is There is an activity registered in my manifest file which I don't have. So I delete those lines from my manifest. Then no toasts are shown and I checked the logs too. No output on changing wifi state.

Why this happened? Please help me guys...

Here is the manifest file:

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.broadcast_internetcheck.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <receiver
            android:name="com.example.broadcast_internetcheck.NetworkChangeReceiver"
            android:label="NetworkChangeReceiver" >
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

Here is my Broadcastreceiver class:

public class NetworkChangeReceiver extends BroadcastReceiver{

  @Override
     public void onReceive(final Context context, final Intent intent) {

         String status = NetworkUtil.getConnectivityStatusString(context);
          /*Above line will return the status of wifi */
         Toast.makeText(context, status, Toast.LENGTH_LONG).show();

     }
}

OTHER TIPS

You can use service instead. But showing Toast through service bit complicated instead you can show notification through service for No Internet Connection.

If you don't want any activity check this answer. Actually you would have to create service for this: link

Create a transparent activity. Launch the toast while the activity is active and immediately finish the activity.

Licensed under: CC-BY-SA with attribution
Not affiliated with StackOverflow
scroll top