如何使用广播

Intent();intent.setAction(SEND_STATIC_ACTION);intent.putExtra(data,静态广播);sendBroadcast(intent);

接收者-广播接收

静态广播常驻内存中是在Manifest文件中注册的可在App未启动时就监听广播动态广播App启动后注册是在代码中注册以及解除注册的广播解除注册后广播也随时结束。

同时注册时动态优于静态

intent.getExtras();Log.d(BroadcastReceiver,静态广播接收器接受了一个

Manifest文件中注册广播接收器

android:name.broadcastreceiver.receiver.StaticBroadcastReceiverandroid:exportedtrueintent-filteraction

android:namesend_static_action/action/intent-filter/receiver

动态广播

intent.getExtras();Log.d(BroadcastReceiver,动态广播接收器接受了一个

注册广播接收者器类

{super.onCreate(savedInstanceState);setContentView(R.layout.activity_broadcast_study);//

intentFilter

IntentFilter();intentFilter.addAction(SEND_DYNAMIC_ACTION);registerReceiver(dynamicBroadcastReceiver,intentFilter);}解除注册

Overrideprotected

{super.onDestroy();unregisterReceiver(dynamicBroadcastReceiver);}

无序广播、有序广播

无序广播-普通广播所有接收器接收的广播没有先后顺序几乎同时收到消息有序广播发送的广播会按照接收器的优先级顺序被接受同一时刻只会有一个接收器收到广播且收到广播之后可以对广播进行截断和修改

有序广播

IntentFilter();intentFilter.addAction(SEND_DYNAMIC_ACTION);intentFilter.setPriority(100);registerReceiver(dynamicBroadcastReceiver,

intentFilter);//

IntentFilter();intentFilter1.addAction(SEND_DYNAMIC_ACTION);intentFilter1.setPriority(101);registerReceiver(broadcastReceiver2,

intentFilter1);

intent.setAction(SEND_GLOBAL_ACTION);

App2

intent.getExtras().getString(data_global),

Toast.LENGTH_LONG).show();Log.d(接受全局广播,

intent.getExtras().getString(data_global));}};

2.注册广播接收器

{super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//

注册广播接收器IntentFilter

IntentFilter();intentFilter.addAction(send_global_action);registerReceiver(broadcastReceiver,

intentFilter);}

解除广播接收器unregisterReceiver(broadcastReceiver);}

本地广播

只能使用动态注册因为本地广播只能监听这个app内部的广播在注册发送广播时需要使用到LocalBroadcastManager

Overrideprotected

{super.onCreate(savedInstanceState);setContentView(R.layout.activity_broadcast_study);//

注册本地广播

LocalBroadcastManager.getInstance(this);IntentFilter

local_intentFilter

IntentFilter();intentFilter1.addAction(SEND_LOCAL_ACTION);localBroadcastManager.registerReceiver(new

LocalBroadcastReceiver(),local_intentFilter);}

Intent

Intent();intent.setAction(SEND_LOCAL_ACTION);intent.putExtra(data,

本地广播);localBroadcastManager.sendBroadcast(intent);

解除注册

Intent();intent.setAction(SEND_LOCAL_ACTION);intent.putExtra(data,

本地广播);localBroadcastManager.sendBroadcast(intent);