android - Start new Activity On Sensor Changed? -

how can start new activity on accelererometer (on shake): when shake phone app crashes - accelerometer run in background

public class shaker_service extends service implements sensoreventlistener{     private static final string tag = "myservice";     private sensormanager sensormanager;     apppreferences appprefs;      @override     public ibinder onbind(intent intent) {         return null;     }      @override     public void oncreate() {         toast.maketext(this, "my service created", toast.length_long).show();         log.d(tag, "oncreate");      }      @override     public void ondestroy() {         toast.maketext(this, "my service stop", toast.length_long).show();         log.d(tag, "ondestroy");         }      @override     public void onstart(intent intent, int startid) {          toast.maketext(this, "my service start", toast.length_long).show();         log.d(tag, "onstart");          sensormanager=(sensormanager)getsystemservice(sensor_service);         // add listener. listener helloandroid (this) class         sensormanager.registerlistener(this,                  sensormanager.getdefaultsensor(sensor.type_accelerometer),                 sensormanager.sensor_delay_normal);      }        @override     public void onaccuracychanged(sensor sensor, int accuracy) {      }      @override     public void onsensorchanged(sensorevent event) {         // check sensor type                 if(event.sensor.gettype()==sensor.type_accelerometer){                      // assign directions                     float x=event.values[0];                     float y=event.values[1];                     float z=event.values[2];                      if (x>10){  startactivity(newintent("com.examles.message"));                       }                 }          } } 

manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"       package="com.examples"       android:versioncode="1"       android:versionname="1.0">          <activity android:name=".message_note"                  android:label="@string/app_name"                   >             <intent-filter>                 <action android:name="com.examples.message" />                 <category android:name="android.intent.category.default" />             </intent-filter>         </activity>   <service android:enabled="true" android:name=".shaker_service" />     </application>  </manifest>  

message_note.java :

public class message_note extends activity {

@override protected void oncreate(bundle savedinstancestate) {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     setcontentview(r.layout.message); } 

}

image of error (logcat) https://mega.co.nz/#!suptabac!wc9y_xlh5gew9ay9_5wbpxwkya4xk-o9wgaxvn6jplk

try using:

intent intent = new intent(this, theactivityyouwanttostart.class); intent.setflags(intent.flag_activity_new_task); startactivity(intent); 

correct way start activity inside service.