Android开发 在application里监听所有当前Activity的生命周期
<h1><span style="color: rgba(0, 128, 128, 1)">前言</span></h1><p><span style="color: rgba(0, 0, 0, 1)"> 在Android开发我们经常需要关注全部创建的activity的生命周期，google在application里给我们提供了对应方法。</span></p>
<h1><span style="color: rgba(0, 128, 128, 1)">代码</span><span style="color: rgba(0, 128, 128, 1)"> </span></h1>
<p> </p>
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<pre><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">class</span> App <span style="color: rgba(0, 0, 255, 1)">extends</span><span style="color: rgba(0, 0, 0, 1)"> Application {
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onCreate() {
</span><span style="color: rgba(0, 0, 255, 1)">super</span><span style="color: rgba(0, 0, 0, 1)">.onCreate();
initActivityLifecycleCallbacks();
}
</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)">
* 在application里监听所以activity生命周期的回调
</span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> initActivityLifecycleCallbacks(){
registerActivityLifecycleCallbacks(</span><span style="color: rgba(0, 0, 255, 1)">new</span> ActivityLifecycleCallbacks() { <span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">添加监听</span>
<span style="color: rgba(0, 0, 0, 1)"> @Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityCreated(Activity activity, Bundle savedInstanceState) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity创建生命周期</span>
<span style="color: rgba(0, 0, 255, 1)">if</span>(activity <span style="color: rgba(0, 0, 255, 1)">instanceof</span><span style="color: rgba(0, 0, 0, 1)"> MainActivity){<span style="color: rgba(0, 0, 0, 1)"> <span style="color: rgba(0, 128, 0, 1)">//<span style="color: rgba(0, 128, 0, 1)">判断创建的activity对应对象</span></span></span>
</span>
<span style="color: rgba(0, 0, 0, 1)"> }
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityStarted(Activity activity) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity启动生命周期</span>
<span style="color: rgba(0, 0, 0, 1)">
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityResumed(Activity activity) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity恢复生命周期</span>
<span style="color: rgba(0, 0, 0, 1)">
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityPaused(Activity activity) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity暂停生命周期</span>
<span style="color: rgba(0, 0, 0, 1)">
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityStopped(Activity activity) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity停止生命周期</span>
<span style="color: rgba(0, 0, 0, 1)">
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivitySaveInstanceState(Activity activity, Bundle outState) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">保存activity实例状态</span>
<span style="color: rgba(0, 0, 0, 1)">
}
@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> onActivityDestroyed(Activity activity) {
</span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">activity销毁生命周期</span>
<span style="color: rgba(0, 0, 0, 1)">
}
});
}
}</span></pre>
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<p> </p>
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