Hai am new in android Application,am trying to get the latitude and longtitude using Broadcast receiver.But my Application is Getting force Close.I dont know why it happens.Anybody kindly rectify my error.
@Override
public void onClick(View v)
{
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
float lat = (float) (location.getLatitude());
float lng = (float) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
} else {
latituteField.setText("provider not available");
longitudeField.setText("provider not available");
}
registerReceiver(receiver,new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
});
private class ConnectivityReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
if(null != info)
{
String state = getNetworkStateString(info.getState());
String stateString = info.toString().replace(',', '\n');
if(state.equals("Connected")){
result();
}
}
}
}
@Override
protected void onResume() {
super.onResume();
//locationManager.requestLocationUpdates(provider,1000, 1, this);
locationManager.requestLocationUpdates(
provider,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
this
);
}
/* Remove the locationlistener updates when Activity is paused */
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
float lat = (float) (location.getLatitude());
float lng = (float) (location.getLongitude());
longitudeField.setText(String.valueOf(lng));
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
Toast.makeText(this, "Disenabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
protected void Display(Cursor c) {
Toast.makeText(this, "rowid: " + c.getString(0) + "\n" +
"Latitude: " + c.getString(1) + "\n" + "Longitude: " + c.getString(2) + "\n" +
Toast.LENGTH_LONG, 0).show();
}
**updata Logcat Error Message**
"01-06 12:08:27.376: ERROR/AndroidRuntime(9725): java.lang.RuntimeException: Unable to resume activity {com.varma.samples.conntest/com.varma.samples.conntest.MainActivity}: java.lang.NullPointerException
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3133)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3148)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2689)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.access$2300(ActivityThread.java:126)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.os.Looper.loop(Looper.java:123)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.main(ActivityThread.java:4632)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at java.lang.reflect.Method.invokeNative(Native Method)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at java.lang.reflect.Method.invoke(Method.java:521)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at dalvik.system.NativeStart.main(Native Method)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): Caused by: java.lang.NullPointerException
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at com.varma.samples.conntest.MainActivity.onResume(MainActivity.java:158)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1149)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.Activity.performResume(Activity.java:3823)
01-06 12:08:27.376: ERROR/AndroidRuntime(9725): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3123)
"
my manifestfile*update*
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.varma.samples.conntest"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".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>
</application>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /> </manifest>
Move the line
from onclick method to oncreate method