Android : android repeating alam is not getting stopperd on the stop button clicked

i am setting a repeated alarm in the android. which fires the activity. This activity is having two buttons stop and snooze. when i click on snooze alarm is postponed to 10 minutes. but alarm is in slider window. i.e it is in onresume state.

i want to stop alarm completely. on both the buttons.

    public class RingAlarm extends Activity {

    MediaPlayer mp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ring_alarm);
        Intent in;
        in = getIntent();

        String s=in.getStringExtra("habbit_id");
        int col= in.getIntExtra("habbit_Color",0);
        ScrollView sv = (ScrollView)findViewById(R.id.sv_ra);
        if(col<0)
        {
            sv.setBackgroundResource(R.color.red);
        }
        if(col>0) {
            sv.setBackgroundResource(R.color.green);
        }
        if(col==0)
        {
            sv.setBackgroundResource(R.color.yellow);
        }
        System.out.println("alarm string" + s);
        TextView tv = (TextView)findViewById(R.id.habbit_ra);
        tv.setText(s);
       //  mp = MediaPlayer.create(getApplicationContext(), R.raw.song1);
        //mp.start();

    }
    public void onthecancelringclicked(View view){
        //mp.stop();
        int id=Process.myPid();
        finish();
        Process.killProcess(id);
        //System.exit(0);

    }

    public void onthesnoozeringclicked(View view){
        //mp.stop();
        long l=System.currentTimeMillis();
        Intent i = this.getIntent();
        Random r = new Random();
        int ri =r.nextInt(1000000)+64;
        PendingIntent pi = PendingIntent.getActivity(this,ri,i,0 );
        AlarmManager am = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE);
        am.set(AlarmManager.RTC_WAKEUP,l+600000,pi);

        finish();
        Process.killProcess(Process.myPid());
    }
}

and my xml file is

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
android:background="@color/background"
>

<TextView
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:text="@string/app_name"
    android:gravity="left|center"
    android:padding="7dp"
    android:background="@color/user_profile"/>

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:id="@+id/sv_ra">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:layout_gravity="center"
            android:id="@+id/habbit_ra"
            android:text="habbit_name"/>

        <AnalogClock
            android:text="time"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="100dp"
            android:layout_gravity="center"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="bsy your self"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:id="@+id/habbit_message_ra"/>

        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_weight="0"
        android:background="@color/user_profile">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="stop"
            android:background="@color/user_profile"
            android:onClick="onthecancelringclicked"/>
        <Button
            android:background="@color/user_profile"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="snooze 10 min"
            android:onClick="onthesnoozeringclicked"/>

        </LinearLayout>

as you can see i have implemented Process.killProcess(pid) method. still my alarm is getting saved into the navigation drawer. i want to remove the activity from everywhere