广播实现的方式

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//实现广播接收器private BroadcastReceiver mUserChangeReceiver = new BroadcastReceiver() {    @Override    public void onReceive(Context context, Intent intent) {        //具体代码    }};//定义一个IntentFilter IntentFilter filter = new IntentFilter(ACTION_USERCHANGE);//将IntentFilter与BroadcastReceiver关联起来context.registerReceiver(receiver, filter);

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