Launching an Activity from a Service
- by nldev
When I am trying to launch a call activity from a Service, I get a NullPointerException. Here is my code:
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + number));
callIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(callIntent);
I get the exception on the startActivity line.
I tried to use getApplication.startActivity and getApplicationContext.startActivity but no luck.
Any ideas?
edit : Maybe some usefull info: I am trying to create a service that will run on the background and scan sensor data, when a certain signal is given i would like to maken an automated call to a number.
edit : full adb error code:
03-31 09:04:10.214: ERROR/AndroidRuntime(1896): Uncaught handler: thread main exiting due to uncaught exception
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): java.lang.RuntimeException: Unable to instantiate service dfz.epilepsiedetector.services.DetectionService: java.lang.NullPointerException
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2668)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.app.ActivityThread.access$3100(ActivityThread.java:116)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1846)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.os.Handler.dispatchMessage(Handler.java:99)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.os.Looper.loop(Looper.java:123)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.app.ActivityThread.main(ActivityThread.java:4203)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at java.lang.reflect.Method.invokeNative(Native Method)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at java.lang.reflect.Method.invoke(Method.java:521)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at dalvik.system.NativeStart.main(Native Method)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): Caused by: java.lang.NullPointerException
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.content.ContextWrapper.getPackageName(ContextWrapper.java:120)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.content.ComponentName.<init>(ComponentName.java:75)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.content.Intent.<init>(Intent.java:2302)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at dfz.epilepsiedetector.services.DetectionService.<init>(DetectionService.java:35)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at java.lang.Class.newInstanceImpl(Native Method)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at java.lang.Class.newInstance(Class.java:1472)
03-31 09:04:10.226: ERROR/AndroidRuntime(1896): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2665)
edit Trimmed class code:
`public class DetectionService extends IntentService implements SensorEventListener
{
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private boolean hasSeizure = false;
private final int POLLS_PER_SECOND = 10;
public DetectionService()
{
super("EpilepsionDetectionService");
//mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
// mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
/*Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + "+31648363944"));
callIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);*/
Intent callIntent = new Intent(DetectionService.this,
InformationActivity.class);
callIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplication().startActivity(callIntent);
//((Activity) getContext()).startActivity(callIntent);
}`
