杀死进程

package com.example.testnull;

import android.os.Bundle;
import android.app.Activity;
import android.app.ActivityManager;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    public void click(View view){
        //自杀式,它只能杀死自己程序，而不能够杀其他的
        /*int pid = android.os.Process.myPid();
        android.os.Process.killProcess(pid);*/
        //杀他式,不能够杀自己
        ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
        am.killBackgroundProcesses("com.android.email");
    }
}