I got stuck with my application where I am using a broadcast receiver to display toast when wifi, bluetooth is ON/OFF
When I added bluetooth code the application is crashing and before that for the wifi and network connection it was showing "connected" in EMULATOR(though wifi /network connection are OFF in emulator)
How to solve this, I don't know where I was wrong.
here is my code
public class BroadCastSampleActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.registerReceiver(this.mConnReceiver, new IntentFilter(
ConnectivityManager.CONNECTIVITY_ACTION));
this.registerReceiver(this.mConnReceiver, new IntentFilter(
WifiManager.WIFI_STATE_CHANGED_ACTION));
this.registerReceiver(this.mConnReceiver, new IntentFilter(
BluetoothAdapter.ACTION_STATE_CHANGED));
}
private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
boolean noConnectivity = intent.getBooleanExtra(
ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
String reason = intent
.getStringExtra(ConnectivityManager.EXTRA_REASON);
boolean isFailover = intent.getBooleanExtra(
ConnectivityManager.EXTRA_IS_FAILOVER, false);
boolean noConnectivity1 = intent.getBooleanExtra(
BluetoothAdapter.ACTION_STATE_CHANGED, false);
boolean isfailover = intent.getBooleanExtra(
BluetoothAdapter.EXTRA_STATE, false);
NetworkInfo currentNetworkInfo = (NetworkInfo) intent
.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
NetworkInfo otherNetworkInfo = (NetworkInfo) intent
.getParcelableExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO);
NetworkInfo currentwifiInfo = (NetworkInfo) intent
.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
NetworkInfo otherwifiInfo = (NetworkInfo) intent
.getParcelableExtra(WifiManager.NETWORK_STATE_CHANGED_ACTION);
NetworkInfo currentbluetoothinfo = (NetworkInfo) intent
.getParcelableExtra(BluetoothAdapter.EXTRA_STATE);
NetworkInfo otherbluetoothinfo = (NetworkInfo) intent
.getParcelableExtra(BluetoothAdapter.ACTION_STATE_CHANGED);
if (currentNetworkInfo.isConnected()) {
Toast.makeText(getApplicationContext(),
"Internet Connected", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
" Internet Not Connected", Toast.LENGTH_LONG).show();
}
if (currentwifiInfo.isConnected()) {
Toast.makeText(getApplicationContext(), "wifi Connected",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
" WIFI Not Connected", Toast.LENGTH_LONG).show();
}
if (currentbluetoothinfo.isAvailable()) {
Toast.makeText(getApplicationContext(),
"Bluetooth Connected", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Bluetooth Not Connected", Toast.LENGTH_LONG).show();
}
}
};
}
Here is my manifest
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WIFI_STATE_CHANGED" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".BroadCastSampleActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
logcat showing these errors when I added bluetooth code
05-29 06:39:27.457: E/AndroidRuntime(384): FATAL EXCEPTION: main
05-29 06:39:27.457: E/AndroidRuntime(384): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x10000000 (has extras) } in com.raghav.broadcast.BroadCastSampleActivity$1@40518c50
05-29 06:39:27.457: E/AndroidRuntime(384): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:722)
05-29 06:39:27.457: E/AndroidRuntime(384): at android.os.Handler.handleCallback(Handler.java:587)
05-29 06:39:27.457: E/AndroidRuntime(384): at android.os.Handler.dispatchMessage(Handler.java:92)
05-29 06:39:27.457: E/AndroidRuntime(384): at android.os.Looper.loop(Looper.java:123)
05-29 06:39:27.457: E/AndroidRuntime(384): at android.app.ActivityThread.main(ActivityThread.java:3683)
05-29 06:39:27.457: E/AndroidRuntime(384): at java.lang.reflect.Method.invokeNative(Native Method)
05-29 06:39:27.457: E/AndroidRuntime(384): at java.lang.reflect.Method.invoke(Method.java:507)
05-29 06:39:27.457: E/AndroidRuntime(384): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-29 06:39:27.457: E/AndroidRuntime(384): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-29 06:39:27.457: E/AndroidRuntime(384): at dalvik.system.NativeStart.main(Native Method)
05-29 06:39:27.457: E/AndroidRuntime(384): Caused by: java.lang.NullPointerException
05-29 06:39:27.457: E/AndroidRuntime(384): at com.raghav.broadcast.BroadCastSampleActivity$1.onReceive(BroadCastSampleActivity.java:80)
05-29 06:39:27.457: E/AndroidRuntime(384): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:709)
05-29 06:39:27.457: E/AndroidRuntime(384): ... 9 more
Bluetooth and WiFi are not supported in emulator. You have to use a real device.