android studio怎么编写计时器

Answer 1

类似iOS中的NSTimer 定时器功能，开关控制随机几秒钟执行指定功能；

平台：Android

开发环境：android Studio

代码实现：

一. 创建Handler对象和Runnable对象

[java] view plain copy print?
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
if (mPageOpen){

if (interstitialAd.isLoaded()){ //示例-谷歌插页广告
interstitialAd.show();
}else {
AdRequest adRequest = new AdRequest.Builder().build();
interstitialAd.loadAd(adRequest);
}
int random = (int)(Math.random() * 10 +20)*1000; //随机时间循环执行
handler.postDelayed(this, random);
}
}
};

二. 开关控制

[java] view plain copy print?
Switch mSwith = (Switch) findViewById(R.id.switchPage);
mSwith.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
mPageOpen = true;
} else {
mPageOpen = false;
}

handler.postDelayed(runnable, 15000); //开关控制执行
}
});

三. 移除定时器

[java] view plain copy print?
handler.removeCallbacks(runnable);

Answer 2

去度娘