1package com.example.simpleperf.simpleperfexamplepurejava; 2 3import android.support.v7.app.AppCompatActivity; 4import android.os.Bundle; 5 6public class MainActivity extends AppCompatActivity { 7 8 @Override 9 protected void onCreate(Bundle savedInstanceState) { 10 super.onCreate(savedInstanceState); 11 setContentView(R.layout.activity_main); 12 13 createBusyThread(); 14 } 15 16 void createBusyThread() { 17 new Thread(new Runnable() { 18 19 volatile int i = 0; 20 21 @Override 22 public void run() { 23 while (true) { 24 i = callFunction(i); 25 } 26 } 27 28 private int callFunction(int a) { 29 return a+1; 30 } 31 }).start(); 32 } 33} 34