之前的一个项目需要监听home键的事件，发现用dispatchkeyevent无法实现监听，后来查了些资料，才知道home键不能用常规的按键事件监听，需要使用广播的方法。下面是我封装的一个工具类。根据自己实际需要修改吧。
注册广播：
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homelistener.getinstance().start(this); |
移除广播
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homelistener.getinstance().stop(this); |
设置监听回调
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homelistener.getinstance().sethomekeylistener(homepresslistener listener）； |
添加监听回调
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homelistener.getinstance().addhomekeylistener(homepresslistener listener） |
移除监听回调
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homelistener.getinstance().removehomekeylistener(homepresslistener listener); |
移除所有监听回调
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homelistener.getinstance().removeallhomekeylistener(); |
销毁
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homelistener.getinstance().destroy(); |
工具类代码：
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import android.content.broadcastreceiver;import android.content.context;import android.content.intent;import android.content.intentfilter;import java.util.arraylist;import java.util.list;import java.util.concurrent.atomic.atomicboolean;public class homelistener { public static homekeylistener getinstance() { homekeylistener listener = homekeylistener.slistener; listener.init(); return listener; } static class homekeylistener { private static final string system_dialog_reason_recent_apps = "recentapps";//home键旁边的最近程序列表键 private static final string system_dialog_reason_home_key = "homekey";//按下home键 private static final string system_dialog_reason_assist = "assist";//某些三星手机的程序列表键 private static atomicboolean isdestroy = new atomicboolean(true); private static atomicboolean isregister = new atomicboolean(false); private static homekeylistener slistener = new homekeylistener(); private list<homepresslistener> mpresslisteners = new arraylist<homepresslistener>(); private homereceiver mreceiver; private intentfilter mhomefileter; private homepresslistener mhomepresslistener; public void init() { if (isdestroy.get()) { this.mpresslisteners = new arraylist<homepresslistener>(); this.mreceiver = new homereceiver(); this.mhomefileter = new intentfilter(intent.action_close_system_dialogs); isdestroy.set(false); } } public synchronized void start(context context) { if (!isregister.get()) { context.registerreceiver(mreceiver, mhomefileter); isregister.set(true); } } public synchronized void stop(context context) { if (isregister.get()) { context.unregisterreceiver(mreceiver); isregister.set(false); } } public void sethomekeylistener(homepresslistener listener) { this.mhomepresslistener = listener; } public void addhomekeylistener(homepresslistener listener) { mpresslisteners.add(listener); } public void removehomekeylistener(homepresslistener listener) { mpresslisteners.add(listener); } public void removeallhomekeylistener() { mpresslisteners.clear(); } public void destroy() { this.mpresslisteners.clear(); this.mpresslisteners = null; this.mreceiver = null; this.mhomefileter = null; this.mhomepresslistener = null; isdestroy.set(true); } public interface homepresslistener { void onhomepress(); void onhomerecentappspress(); } class homereceiver extends broadcastreceiver { @override public void onreceive(context context, intent intent) { receive(intent); } } private void receive(intent intent) { string action = intent.getaction(); if (action != null && action.equals(intent.action_close_system_dialogs)) { string reason = intent.getstringextra( "reason" ); dispatchpress(reason); } } private void dispatchpress(string reason) { switch (reason) { case system_dialog_reason_home_key: if (mhomepresslistener != null) mhomepresslistener.onhomepress(); for (homepresslistener listener : mpresslisteners) listener.onhomepress(); break; case system_dialog_reason_recent_apps: case system_dialog_reason_assist: if (mhomepresslistener != null) mhomepresslistener.onhomerecentappspress(); for (homepresslistener listener : mpresslisteners) listener.onhomerecentappspress(); break; } } }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://www.jianshu.com/p/ad937a3ca243
