程序运行过程中连接两个不同的组件，通过Intent程序可向android传递某种请求，android通过请求的内容选择适当组件来完成请求（比如要打开浏览器之类的）【 android根据Intent请求内容查询各组件注册时声明的IntentFilter...可以调用Intent的setDataAndType来设定防止覆盖 IntentFilter（意图过滤器） ： AndroidManifest注册组件时可以添加...IntentFilter，然后通过Intent的属性来过滤Intent，捕获到满足条件的组件之后启动这个组件——>隐式意图的原理
而在检查每个 Activity 能否处理 Intent 的过程中，需要访问 Intent 过滤器（IntentFilter）。...Intent 过滤器 IntentFilter 我们可以在 AndroidManifest.xml 中给 Activity 设置一个 IntentFilter 属性，比如这样： <activity...一个 Activity 也可以有多个 IntentFilter，相当于多了几个过滤器，被筛选到的可能就更大了。...IntentFilter 的匹配规则 1.action 的匹配规则 action 可以理解为一个组件具备功能、可以进行什么操作。系统为我们提供了很多内置的 action，当然也可以自定义。...以上述 intentFilter 为例，startActivity(intent) 中的 intent 至少要有 android.intent.action.EDIT 和 android.intent.action.VIEW
IntentFilter的匹配规则 IntentFilter的使用 假如我们要隐式启动一个Activity我们需要成功匹配activity中的任意一个intent-filter。
眼下最完整的，须要注冊的动作匹配例如以下： IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);...intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED); intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED...); intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED); intentFilter.addAction...(Intent.ACTION_MEDIA_CHECKING); intentFilter.addAction(Intent.ACTION_MEDIA_BAD_REMOVAL);...intentFilter.addDataScheme("file"); mContext.registerReceiver(mMediaReceiver, intentFilter);
通常，我们只会在注册或登录页面读取短信验证码，所以，我们采用动态注册广播的方式注册这个广播，如： // 注册广播 IntentFilter intentFilter = new IntentFilter...(mSMSBroadcastReceiver,intentFilter); 取消注册 @Override protected void onDestroy() { super.onDestroy...R.id.et_code); mSMSBroadcastReceiver.setOnReceiveSMSListener(this); // 注册广播 IntentFilter...intentFilter = new IntentFilter(SMSBroadcastReceiver.SMS_RECEIVED_ACTION); // 设置优先级...intentFilter.setPriority(Integer.MAX_VALUE); registerReceiver(mSMSBroadcastReceiver,intentFilter
当应用程序注册了某个广播时，即便设置了IntentFilter还是会接收到来自其他应用程序的广播进行匹配判断。...那如果一个Receiver注册了多个IntentFilter呢？比如说一个receiver对象注册两次传入不同的IntentFilter.所以Value需要改造为ArrayList。...} //将IntentFilter加入receiver对应的匹配规则中。...filters为mReceivers map的value,类型是IntentFilter的ArrayList。 //同一个receiver可能有多个IntentFilter。...mReceivers就记录了所有的receiver,并且指明每一个receiver所能匹配到的IntentFilter.
= IntentFilter() intentFilter.addAction(IntentManager.ACTION_TYPE_THREAD) manager.registerReceiver...(broadcastReceiver, intentFilter) val intent = Intent(this, MyIntentService::class.java)...startService(intent) } 可以看到 我只添加了 intentFilter.addAction(IntentManager.ACTION_TYPE_THREAD) 但是我在服务中...= IntentFilter() intentFilter.addAction(IntentManager.ACTION_TYPE_SERVICE) intentFilter.addAction...(IntentManager.ACTION_TYPE_THREAD) manager.registerReceiver(broadcastReceiver, intentFilter)
intentFilter = new IntentFilter(); intentFilter.addAction("baobao2"); registerReceiver(myReceiver,intentFilter...extends IntentFilter> filters = (List) RefInvoke.getFieldObject( "android.content.pm.PackageParser$Component...extends IntentFilter> filters = (List) RefInvoke.getFieldObject( "android.content.pm.PackageParser
主动获取充电状态流程 : ① 创建 IntentFilter : 创建 IntentFilter , 并为其设置 Intent.ACTION_BATTERY_CHANGED 意图 ; IntentFilter...intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); ② 注册广播接受者 : 调用 Context 对象的 registerReceiver...广播 , 可以从该广播中获取对应的充电状态变化数据 ; ⑥ 注册多个意图 : 如果在 IntentFilter 中注册多个意图 , 广播接收者如果不为空 , 则会处理每一个意图 , 但是返回值只能返回一个意图...intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); // 注册广播接受者 Intent intent...= context.registerReceiver(null, intentFilter); // 获取充电状态 int batteryChargeState =
intentFilter; private NetworkChangeReceive networkChangeReceive; @Override protected...= new IntentFilter(); intentFilter.addAction("网络改变"); networkChangeReceive = new NetworkChangeReceive...(); registerReceiver(networkChangeReceive,intentFilter); Toast.makeText(this.getBaseContext...= new IntentFilter(); intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST");...); intentFilter.addAction("网络改变"); networkChangeReceive = new NetworkChangeReceive
intentFilter; private LocalReceiver localReceiver; private LocalBroadcastManager localBroadcastManager...= new IntentFilter(); intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE"); networkChangeReceiver...= new NetworkChangeReceiver(); registerReceiver(networkChangeReceiver,intentFilter); localBroadcastManager...= new IntentFilter(); intentFilter.addAction("com.example.broadcasttest.LOCAL_BROACAST"); localReceiver...= new LocalReceiver(); localBroadcastManager.registerReceiver(localReceiver,intentFilter);//注册本地广播监听器
通常，我们只会在注册或登录页面读取短信验证码，所以，我们采用动态注册广播的方式注册这个广播，如： // 注册广播 IntentFilter intentFilter = new IntentFilter...(SMSBroadcastReceiver.SMS_RECEIVED_ACTION); // 设置优先级 intentFilter.setPriority(Integer.MAX_VALUE); registerReceiver...(mSMSBroadcastReceiver,intentFilter); 取消注册 @Override protected void onDestroy() { super.onDestroy();...intentFilter = new IntentFilter(SMSBroadcastReceiver.SMS_RECEIVED_ACTION); // 设置优先级 intentFilter.setPriority...(Integer.MAX_VALUE); registerReceiver(mSMSBroadcastReceiver,intentFilter); } @Override public void
mLocalBroadcastManager = LocalBroadcastManager.getInstance(mContext); mBroadcastReceiver = new MyBroadcastReceiver(); IntentFilter...intentFilter = new IntentFilter(); intentFilter.addAction(ACTION_TYPE_PREPARE); intentFilter.addAction...(ACTION_TYPE_PROGRESS); intentFilter.addAction(ACTION_TYPE_COMPLETE); intentFilter.addAction(ACTION_TYPE_FAIL...); mLocalBroadcastManager.registerReceiver(mBroadcastReceiver, intentFilter); // ondestory时调用 mLocalBroadcastManager.unregisterReceiver
Activity { public static String ACTION = "com.example.blogBroadcasts.MY_BROADCAST"; private IntentFilter...intentFilter = null; private MyBroadcastReceiver myBroadcastReceiver = null; private Button...super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intentFilter...= new IntentFilter(MainActivity.ACTION); // 设置广播接收器的信息过滤器， intentFilter.setPriority(100);...，用于过滤广播信息 registerReceiver(myBroadcastReceiver, intentFilter); intentFilter.setPriority
BroadcastTest项目，然后修改MainActivity中的代码，如下： public class MainActivity extends AppCompatActivity { private IntentFilter...intentFilter; private NetworkChangeReceiver networkChangeReceiver; @Override protected void onCreate...savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intentFilter...=new IntentFilter(); intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE"); //广播接收器想要监听什么广播...action networkChangeReceiver=new NetworkChangeReceiver(); registerReceiver(networkChangeReceiver,intentFilter
android:name="android.hardware.usb.host" android:required="true" / 3.监听u盘 插入拔出的广播 //监听otg插入 拔出 IntentFilter...usbDeviceStateFilter = new IntentFilter(); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED...filter = new IntentFilter(Constant.ACTION_USB_PERMISSION); mContext.registerReceiver(UDiskMountedReceiver...usbDeviceStateFilter = new IntentFilter(); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED...filter = new IntentFilter(Constant.ACTION_USB_PERMISSION); mContext.registerReceiver(UDiskMountedReceiver
savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.broadcast); IntentFilter...intentFilter = new IntentFilter("broad"); this.getApplication().registerReceiver(mB, intentFilter);...onDestroy() { super.onDestroy(); this.unregisterReceiver(mB); } 这样会出错的哦， 改成： this.registerReceiver(mB, intentFilter...); this.unregisterReceiver(mB); 或 this.getApplication().registerReceiver(mB, intentFilter); this.getApplication
通常，我们只会在注册或登录页面读取短信验证码，所以，我们采用动态注册广播的方式注册这个广播，如： // 注册广播 IntentFilter intentFilter = new IntentFilter...(mSMSBroadcastReceiver,intentFilter); 取消注册 @Override protected void onDestroy() { super.onDestroy...(EditText) findViewById(R.id.et_code); mSMSBroadcastReceiver.setOnReceiveSMSListener(this); // 注册广播 IntentFilter...intentFilter = new IntentFilter(SMSBroadcastReceiver.SMS_RECEIVED_ACTION); // 设置优先级 intentFilter.setPriority...(Integer.MAX_VALUE); registerReceiver(mSMSBroadcastReceiver,intentFilter); } @Override public void onReceived
package com.example.amusic.welcome; import android.content.Intent; import android.content.IntentFilter...intentFilter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(...savedInstanceState); setContentView(R.layout.activity_welcome); //手机网络检测 intentFilter = new...IntentFilter(); intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE"); networkChangeReceiver...= new NetworkChangeReceiver(); registerReceiver ( networkChangeReceiver, intentFilter); Timer
android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter...android.os.Bundle; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private IntentFilter...intentFilter; private NetworkChangeReceiver networkChangeReceiver; @Override protected void onCreate...savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intentFilter...= new IntentFilter();//创建一个过滤器实例 intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");//
领取专属 10元无门槛券
手把手带您无忧上云
云服务器
ICP备案
对象存储
实时音视频
即时通信 IM
