Android Command processing process source tracking

1. Dial-up interface input * #06 #, show IMEI number, how did this come out?

2. How to quickly find the instructions in the Android platform?

1. Register a TextChanged listener Textwatcher in Dialpadfragment EditText,

When the content in EditText is changed, the corresponding callback function is called, and Textwatcher is an interface:

Public interface Textwatcher extends Nocopyspan {public    void beforetextchanged (charsequence s, int start,int count, I NT after);    public void ontextchanged (charsequence s, int start, int before, int count);    public void aftertextchanged (Editable s);}

This interface is implemented in Dialpadfragment:

    public void aftertextchanged (Editable input) {        //when DTMF dialpad buttons is being pressed, we delay SPECIALCHARSEQ Uencmgr sequence,        //Since some of specialcharsequencemgr ' s behavior are too abrupt for the "touch-down"        //Behavio R.        if (!mdigitsfilledbyintent &&                specialcharsequencemgr.handlechars (getactivity (), input.tostring (), Mdigits) {            //A special sequence was entered, clear the digits            mdigits.gettext (). Clear ();        if (Isdigitsempty ()) {            mdigitsfilledbyintent = false;            Mdigits.setcursorvisible (FALSE);        } else {mdigits.setcursorvisible (true);  }        Updatedialanddeletebuttonenabledstate ();        Loadsmartdialentries ();        Refreshdigittextsize (input);    }

Instruction processing protagonist: Specialcharsequencemgr.handlechars (Getactivity (), input.tostring (), mdigits)

Look at the body of the method:

    Static Boolean Handlechars (context context, String input, Boolean usesystemwindow,            EditText textField) {        //get Rid of the separators so, the string gets parsed correctly        string dialstring = Phonenumberutils.stripseparators (in put);        if (handleprlversion (context, dialstring)                | | | handlemodemtestdisplay (CONTEXT, dialstring)                | | Handleimeidisplay (context, dialstring, Usesystemwindow)                | | Handleregulatoryinfodisplay (CONTEXT, dialstring)                | | | handlepinentry (CONTEXT, dialstring)                | | Handleadnentry (context, dialstring, TextField)                | | Handlesecretcode (CONTEXT, dialstring)            return true;        return false;    }

Here is a handleimeidisplay (context, dialstring, Usesystemwindow), looking at its main body:

    Static Boolean Handleimeidisplay (context context, String input, Boolean Usesystemwindow) {if (Input.equals (MMI _imei_display) {<span style= "color: #3333ff;" >//</span><span style= "font-family:arial, Helvetica, Sans-serif;" ><span style= "color: #3333ff;" >mmi_imei_display = "* #06 #" </span></span> if (Msimtelephonymanager.getdefault (). ismultisimenable D ()) {return Handlemsimimeidisplay (context); <span style= "Background-color:rgb (255, 255, 255);" ><span style= "color: #3333ff;" >//display IMEI number </span></span>} int subscription = Msimtelephonymanager.getdefault (). GETPR            Eferredvoicesubscription ();            int phonetype; if (Msimtelephonymanager.getdefault (). ismultisimenabled ()) {Phonetype = ((Msimtelephonymanager) context.get            Systemservice (Context.msim_telephony_service)). Getcurrentphonetype (subscription);        } else {        Phonetype = ((Telephonymanager) Context.getsystemservice (Context.telephony_service)). Getcur            Rentphonetype (); } if (Phonetype = = telephonymanager.phone_type_gsm) {Showimeipanel (context, Usesystemwindow); <s Pan style= "font-family:arial, Helvetica, Sans-serif;" ><span style= "color: #3333ff;"            >//display IMEI number </span></span> return true; } else if (Phonetype = = TELEPHONYMANAGER.PHONE_TYPE_CDMA) {Showmeidpanel (context, Usesystemwindow); <spa N style= "font-family:arial, Helvetica, Sans-serif;" ><span style= "color: #3333ff;"            >//display IMEI number </span></span> return true;    }} return false; }

The display process for the IMEI number is presented here.

2. There are also methods for handling other instructions in Handlechars:

Handlemodemtestdisplay, Handleregulatoryinfodisplay, Handlesecretcode, etc.,

One of the Handlesecretcode is to *#*#. #*#* This kind of instruction to focus on processing, see the Source:

  Static Boolean Handlesecretcode (context context, String input) {        //Secret codes is in the form *#*#<code>#*#*< C2/>int len = Input.length ();        if (Len > 8 && input.startswith ("*#*#") && input.endswith ("#*#*")) {            Intent Intent = new Intent (Tel Ephonyintents.secret_code_action,                    uri.parse ("android_secret_code://" + input.substring (4, len-4)));            Context.sendbroadcast (intent);            return true;        }        return false;    }

You can see that a broadcast is sent, and the action of the broadcast is:

public static final String secret_code_action = "Android.provider.Telephony.SECRET_CODE";
Data is a URI,

So find Android.provider.Telephony.SECRET_CODE in all the Androidmanifest.xml files inside the platform,

You can find all the *#*# in the platform. #*#* types of directives, such as:

<receiver android:name= "Testingsettingsbroadcastreceiver" >            <intent-filter>                 <action Android:name= "Android.provider.Telephony.SECRET_CODE"/>                 <data android:scheme= "Android_secret_code" android:host= "837851"/>            </intent-filter></receiver>

     <receiver android:name= "Testingsettingsbroadcastreceiver" >            <intent-filter>                 <action Android:name= "Android.provider.Telephony.SECRET_CODE"/>                 <data android:scheme= "Android_secret_code" android:host= "4636"/>            </intent-filter>       </receiver>