BroadcastReceiver

广播的类型主要分为5类：

普通广播（Normal Broadcast）
系统广播（System Broadcast）
有序广播（Ordered Broadcast）
粘性广播（Sticky Broadcast）
App应用内广播（Local Broadcast）

发送普通广播使用步骤

①自定义一个关播接收者继承BroadcastReceivre
②注册 静态注册 动态注册
③通过intent发送广播

• 静态注册 在在AndroidManifest.xml里通过<receive>标签声明

<receiver android:name=".StaticalReceiver">
            <intent-filter>
                <action android:name="com.example.broadcastreceiver.StaticalReceiver"/>
            </intent-filter>
        </receiver>

• 动态注册 在onResume调用 registerReceiver方法

@Override
    protected void onResume() {
        super.onResume();
        //获取广播接收者的对象
        dynamicReceiver = new DynamicReceiver();
        //添加intentFilter
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.broadcastreceiver.StaticalReceiver");

        //注册广播 
        registerReceiver(dynamicReceiver, intentFilter);
    }

    @Override
    protected void onPause() {
        super.onPause();
        //销毁广播
        unregisterReceiver(dynamicReceiver);
    }

2. 顺序广播

①动态注册
②通过intentFilter.setPriority();决定接收广播的先后顺序
③销毁广播

private void order() {
        Intent intent = new Intent("com.example.broadcastreceiver.StaticalReceiver");
        sendOrderedBroadcast(intent, null);
    }

3. 本地广播

//注册应用内广播接收器
//步骤1：实例化BroadcastReceiver子类 & IntentFilter mBroadcastReceiver 
localReceiver= new LocalReceiver(); 
IntentFilter intentFilter = new IntentFilter(); 

//步骤2：实例化LocalBroadcastManager的实例
localBroadcastManager = LocalBroadcastManager.getInstance(this);

//步骤3：设置接收广播的类型 
intentFilter.addAction("com.example.broadcastreceiver.LocalReceiver");

//步骤4：调用LocalBroadcastManager单一实例的registerReceiver（）方法进行动态注册 
localBroadcastManager.registerReceiver(localReceiver, intentFilter);

//取消注册应用内广播接收器
localBroadcastManager.unregisterReceiver(localReceiver);

//发送应用内广播
Intent intent = new Intent();
intent.setAction("com.example.broadcastreceiver.LocalReceiver");
localBroadcastManager.sendBroadcast(intent);