<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" >

  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:onClick="click"
    android:text="自杀" />

</RelativeLayout>

 public void click(View view) {
    // 获取当前进程的id
    int pid = android.os.Process.myPid();
    // 这个方法只能用于自杀操作
    android.os.Process.killProcess(pid);

  }

ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); 
manager.restartPackage(getPackageName()); 
<uses-permission android:name="android.permission.RESTART_PACKAGES" />