"Android" several common broadcast listeners (WIFI, light off screen, home key, SMS) summary

Broadcast receiver for WiFi status monitoring

/** * Monitor the WiFi status of the broadcast receiver, note that you do not need to add any permissions */public final class Wifistatereceiver extends Broadcastreceiver {private static FINA    L String TAG = "Tagforwifistatereceiver";        @Override public void OnReceive (Context C, Intent Intent) {Bundle bundle = Intent.getextras ();        int statusint = Bundle.getint ("Wifi_state");                Switch (statusint) {case wifimanager.wifi_state_unknown:log.i (TAG, "unknown state");            Break                Case WIFIMANAGER.WIFI_STATE_ENABLING:LOG.I (TAG, "WiFi is Connected");            Break                Case WIFIMANAGER.WIFI_STATE_ENABLED:LOG.I (TAG, "WIFI available");            Break                Case WIFIMANAGER.WIFI_STATE_DISABLING:LOG.I (TAG, "WiFi is disconnecting");            Break                Case WIFIMANAGER.WIFI_STATE_DISABLED:LOG.I (TAG, "WIFI unavailable");            Break        Default:break; }}}/** * Register broadcast receiver */private void Registreceiver () {    Receiver = new Wifistatereceiver ();    Intentfilter filter = new Intentfilter (wifimanager.wifi_state_changed_action); Registerreceiver (receiver, filter);}

Screen off to monitor with light screen

When the screen is off to light screen will be sent two broadcast screen_on and Screen_off, but these two action** can only be registered in the form of code to be able to be listened to, in the Androidmanifest.xml register at all.

/** * light off screen monitoring, do not need any permissions, must code registration, Androidmanifest.xml registration Invalid */public class Screenactionreceiver extends Broadcastreceiver {priv    Ate String TAG = "Tagforscreenactionreceiver";    Private Boolean isregisterreceiver = false;        @Override public void OnReceive (context context, Intent Intent) {String action = intent.getaction ();        if (Action.equals (intent.action_screen_on)) {log.i (TAG, "the screen unlocks the broadcast (that is, the screen is lit) ...");        } else if (Action.equals (Intent.action_screen_off)) {log.i (TAG, "screen lock broadcast (i.e. off screen) ..."); }}/** * Broadcast Register * * @param mcontext Context Object */public void Registerscreenactionreceiver (context MCon            Text) {if (!isregisterreceiver) {isregisterreceiver = true;            Intentfilter filter = new Intentfilter ();            Filter.addaction (Intent.action_screen_off);            Filter.addaction (intent.action_screen_on);            LOG.I (TAG, "registration screen unlock, lock broadcast receiver ..."); Mcontext.registerreceiver (screenactionreceiveR.this, filter); }}/** * Broadcast logoff * * @param mcontext Context Object */public void Unregisterscreenactionreceiver (context MC            Ontext) {if (isregisterreceiver) {isregisterreceiver = false;            LOG.I (TAG, "logout screen unlock, lock broadcast receiver ...");        Mcontext.unregisterreceiver (Screenactionreceiver.this); }    }}

Home key Monitoring

/** * Home key is a system button, we can not intercept through onkeydown, it is intercept not * to, we can only get when he was pressed. is through the broadcast receiver, this broadcast also does not require any permissions */public class Homekeyeventbroadcastreceiver extends Broadcastreceiver {private String TAG = "Ta    Gforhomekeyeventbroadcastreceiver ";    Static final String System_reason = "REASON";    Static final String System_home_key = "HomeKey";    Static final String System_recent_apps = "Recentapps";    Private Boolean isregisterreceiver = false;        @Override public void OnReceive (context context, Intent Intent) {String action = intent.getaction ();            if (Action.equals (intent.action_close_system_dialogs)) {String reason = Intent.getstringextra (System_reason);                    if (reason! = null) {if (Reason.equals (System_home_key)) {//HOME KEY processing point                LOG.I (TAG, "Click the Home button"); } else if (Reason.equals (System_recent_apps)) {//Long home key handles the point log.i (TAG, "long pressed H                ome key "); }            }}}/** * Broadcast Register * * @param mcontext Context Object */public void Register (context MCo            ntext) {if (!isregisterreceiver) {isregisterreceiver = true;            Intentfilter filter = new Intentfilter ();            Filter.addaction (Intent.action_close_system_dialogs);        Mcontext.registerreceiver (homekeyeventbroadcastreceiver.this, filter); }}/** * Broadcast logoff * * @param mcontext Context Object */public void Unregisterscreenactionreceiver (context MC            Ontext) {if (isregisterreceiver) {isregisterreceiver = false;        Mcontext.unregisterreceiver (Homekeyeventbroadcastreceiver.this); }    }}

SMS Broadcast recipient (SMS blocker possible)

The Android system sends an ordered broadcast when it receives a text message, and if we define a recipient to receive the broadcast, we can get the message or intercept the text.
Define broadcast receivers to receive broadcast Android.provider.Telephony.SMS_RECEIVED
Need to receive SMS permission:
SMS notification in Android system is an orderly broadcast , we need to intercept spam messages, you can configure a higher priority, receive information to determine whether Abortbroadcast (), that is, stop the broadcast continue low priority broadcast

public class SmsReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        Object[] pdus = (Object[]) intent.getExtras().get("pdus");      // 获取短信数据(可能有多段)        for (Object pdu : pdus) {            SmsMessage sms = SmsMessage.createFromPdu((byte[]) pdu);    // 把短信数据封装成SmsMessage对象            Date date = new Date(sms.getTimestampMillis());             // 短信时间            String address = sms.getOriginatingAddress();               // 获取发信人号码            String body = sms.getMessageBody();                         // 短信内容            System.out.println(date + ", " + address + ", " + body);                if ("18600012345".equals(address)) {                abortBroadcast();                return;            }        }    }}

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"Android" several common broadcast listeners (WIFI, light off screen, home key, SMS) summary