Android监听Home键（通过广播）

版权声明：转载请注明出处。 https://blog.csdn.net/rentee/article/details/51693856

代码如下：

/**
 * 监听home键，必须在当前界面运行时注册，运行结束后反注册
 */
public class HomeKeyMonitor {

    /**
     * 参数
     */
    private static final String SYSTEM_REASON = "reason";
    private static final String SYSTEM_HOME_KEY = "homekey";
    private static final String SYSTEM_HOME_RECENT_APPS = "recentapps";
    private static final String SYSTEM_HOME_LOCK = "lock";
    /**
     * 监听home键的Receiver
     */
    private BroadcastReceiver mHomeKeyReceiver = null;
    /**
     * Context
     */
    private Context mContext = null;
    /**
     * OnHomeKeyListener
     */
    private OnHomeKeyListener mOnHomeKeyListener = null;

    /**
     * @param context
     * @param onHomeKeyListener 请用{@link DefaultOnHomeKeyListener}这个代替
     */
    public HomeKeyMonitor(Context context, OnHomeKeyListener onHomeKeyListener) {
        mContext = context;
        mOnHomeKeyListener = onHomeKeyListener;
        if (mHomeKeyReceiver == null) {
            mHomeKeyReceiver = new BroadcastReceiver() {

                @Override
                public void onReceive(Context context, Intent intent) {
                    if (intent != null && intent.getAction().equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
                        String reason = intent.getStringExtra(SYSTEM_REASON);
                        if (!TextUtils.isEmpty(reason)) {
                            if (reason.equals(SYSTEM_HOME_KEY)) {
                                // home键
                                if (mOnHomeKeyListener != null) {
                                    mOnHomeKeyListener.onHome();
                                }
                            } else if (reason.equals(SYSTEM_HOME_RECENT_APPS)) {
                                // 最近应用
                                if (mOnHomeKeyListener != null) {
                                    mOnHomeKeyListener.onRecentApps();
                                }
                            } else if (reason.equals(SYSTEM_HOME_LOCK)) {
                                // 锁屏
                                if (mOnHomeKeyListener != null) {
                                    mOnHomeKeyListener.onLock();
                                }
                            } 
                        }
                    }
                }
            };
        }
        context.registerReceiver(mHomeKeyReceiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
    }

    public void unregisterReceiver() {
        if (mHomeKeyReceiver != null) {
            mContext.unregisterReceiver(mHomeKeyReceiver);
            mHomeKeyReceiver = null;
        }
    }
}

这里使用类继承且空实现的方式，之后使用时可以不用实现接口的每一个方法。

/**
 * 监听Home键回调
 */
public interface OnHomeKeyListener {
    public void onHome();
    public void onRecentApps();
    public void onLock();

    /**
     * 监听Home键回调
     */
    public class DefaultOnHomeKeyListener implements OnHomeKeyListener {

        @Override
        public void onHome() {

        }

        @Override
        public void onRecentApps() {

        }

        @Override
        public void onLock() {

        }
    }
}

使用方式很简单：

    private OnHomeKeyListener.DefaultOnHomeKeyListener mHomeKeyListener = new OnHomeKeyListener.DefaultOnHomeKeyListener() {
        @Override
        public void onHome() {
            super.onHome();
            //do some thing
        }
    };