Android sends SMS identification number rules to determine the number of characters 70

Public class Duan extends activity {/* declares the variable a button and two edittext */private button mbutton1; private edittext medittext1; private edittext medittext2;/** called when the activity is first created. * // @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main);/** use the findviewbyid constructor to construct * edittext1, edittext2, And button objects */medittext1 = (ED Ittext) findviewbyid (R. id. myedittext1); medittext2 = (edittext) findviewbyid (R. id. myedittext2); mbutton1 = (button) findviewbyid (R. id. mybutton1);/* load the default text into edittext */medittext1.settext ("Enter the number"); medittext2.settext ("Enter the content !! ");/* Set onclicklistener for the user to respond when clicking edittext */medittext1.setonclicklistener (New edittext. onclicklistener () {public void onclick (view v) {/* clear the body when you click edittext */medittext1.settext ("");}}); /* Set onclicklistener to allow the user to respond when clicking edittext */medittext2.setonclicklistener (New edittext. onclicklistener () {public void onclick (view v) {/* clear the body when edittext is clicked */medittext2.settext ("") ;}});/* Set onclicklistener to allow users to click Bu Tton response */mbutton1.setonclicklistener (New button. onclicklistener () {@ override public void onclick (view v) {/* Get the SMS recipient's phone number from edittext1 */string strdestaddress = medittext1.gettext (). tostring ();/* Get text message content from edittext2 */string strmessage = medittext2.gettext (). tostring ();/* construct a smsmanager object for obtaining the default instance */smsmanager = smsmanager. getdefault (); // todo auto-generated method stub/* Check the recipient Whether the telephone format and Text Message count exceed 70 characters */If (isphonenumbervalid (strdestaddress) = true & iswithin70 (strmessage) = true) {try {/** when both conditions are checked and passed, send a text message * first construct a pendingintent object and broadcast it using getbroadcast () * to pendingintent, phone, text message and other parameters * pass in the sendtextmessage () method to send text messages */pendingintent Mpi = pendingintent. getbroadcast (Duan. this, 0, new intent (), 0); smsmanager. sendtextmessage (strdestaddress, null, strmessage, Mpi, null);} catch (exception E) {e. printstacktrace ();} toast. maketext (Duan. This, "sent successfully !! ", Toast. length_short ). show (); medittext1.settext (""); medittext2.settext ("");} when the else {/* phone format and text message do not meet the conditions, toast reminder */If (isphonenumbervalid (strdestaddress) = false) {/* with more than 70 characters */If (iswithin70 (strmessage) = false) {toast. maketext (Duan. this, "the phone number format is incorrect + the text message content exceeds 70 characters. Please check it !! ", Toast. length_short). Show () ;}else {toast. maketext (Duan. This," the phone number format is incorrect. Please check it !! ", Toast. length_short ). show () ;}/ * The number of words exceeds 70 characters */else if (iswithin70 (strmessage) = false) {toast. maketext (Duan. this, "the text message content exceeds 70 characters. Please delete some content !! ", Toast. length_short ). show () ;}}}) ;}/ * check whether the string is a telephone number and return the true or false value */public static Boolean isphonenumbervalid (string phonenumber) {Boolean isvalid = false;/* acceptable phone numbers: * ^ \\(?: You can start with "(" * (\ D {3}): followed by three numbers *\\)?: You can use ")" to connect * [-]?: After the preceding format, you can select "-". * (\ D {3}): followed by three numbers * [-]?: You can choose "-" to connect the device. * (\ D {5}) $: end with five digits. * The following numeric formats can be compared: * (123) 456-7890,123-456-7890,123 4567890, (123)-456-7890 */string expression = "^ \\(? (\ D {3 })\\)? [-]? (\ D {3}) [-]? (\ D {5}) $ ";/* acceptable phone formats: * ^ \\(?: You can start with "(" * (\ D {3}): followed by three numbers *\\)?: You can use ")" to connect * [-]?: After the above format, you can choose "-". * (\ D {4}): followed by four numbers * [-]?: You can choose "-" to connect the device. * (\ D {4}) $: ends with four digits. * The following numeric formats can be compared: * (02) 3456-7890, 02-3456-7890,023 4567890, (02)-3456-7890 */string expression2 = "^ \\(? (\ D {3 })\\)? [-]? (\ D {4}) [-]? (\ D {4}) $ "; charsequence inputstr = phonenumber;/* create pattern */pattern = pattern. compile (expression);/* pass pattern as a parameter to matcher for regular expression */matcher = pattern. matcher (inputstr);/* Create pattern2 */pattern pattern2 = pattern. compile (expression2);/* pass pattern2 as a parameter to matcher2 for regular expression */matcher matcher2 = pattern2.matcher (inputstr); If (matcher. matches () | matcher2.matches () {isvalid = true;} return isvalid;} public static Boolean iswithin70 (string text) {If (text. length () <= 70) {return true;} else {return false ;}}}