android - how to assign textview value into string -
i want dynamically assign value of textview name "tvdistanceduration" string pass string activity
textview tvdistanceduration; public string f= ""; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.publicplaceactivity); tvdistanceduration = (textview) findviewbyid(r.id.tv_distance_time); // initializing f = tvdistanceduration.gettext().tostring(); this code when view f shown nothing how can assign textview value f varaible ?
first activity contain textview
package com.example.project; import java.io.bufferedreader; import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.net.httpurlconnection; import java.net.url; import java.util.arraylist; import java.util.hashmap; import java.util.list; import org.json.jsonobject; import android.content.intent; import android.graphics.color; import android.os.asynctask; import android.os.bundle; import android.support.v4.app.fragmentactivity; import android.util.log; import android.view.menu; import android.view.view; import android.widget.textview; import android.widget.toast; import com.google.android.gms.maps.googlemap; import com.google.android.gms.maps.googlemap.onmapclicklistener; import com.google.android.gms.maps.supportmapfragment; import com.google.android.gms.maps.model.bitmapdescriptorfactory; import com.google.android.gms.maps.model.latlng; import com.google.android.gms.maps.model.markeroptions; import com.google.android.gms.maps.model.polylineoptions; public class publicplaceactivity extends fragmentactivity { googlemap map; arraylist<latlng> markerpoints; textview tvdistanceduration; public string f= ""; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.publicplaceactivity); tvdistanceduration = (textview) findviewbyid(r.id.tv_distance_time); // initializing f = tvdistanceduration.gettext().tostring(); markerpoints = new arraylist<latlng>(); // getting reference supportmapfragment of activity_main supportmapfragment fm = (supportmapfragment)getsupportfragmentmanager().findfragmentbyid(r.id.map); // getting map supportmapfragment map = fm.getmap(); // enable mylocation button in map map.setmylocationenabled(true); // setting onclick event listener map map.setonmapclicklistener(new onmapclicklistener() { @override public void onmapclick(latlng point) { // 2 locations if(markerpoints.size()>1){ markerpoints.clear(); map.clear(); } // adding new item arraylist markerpoints.add(point); // creating markeroptions markeroptions options = new markeroptions(); // setting position of marker options.position(point); //int s = markerpoints.size(); /** * start location, color of marker green , * end location, color of marker red. */ if(markerpoints.size()==1){ options.icon(bitmapdescriptorfactory.defaultmarker(bitmapdescriptorfactory.hue_green)); }else if(markerpoints.size()==2){ options.icon(bitmapdescriptorfactory.defaultmarker(bitmapdescriptorfactory.hue_red)); } else{ options.icon(bitmapdescriptorfactory.defaultmarker(bitmapdescriptorfactory.hue_yellow)); } // add new marker google map android api v2 map.addmarker(options); // checks, whether start , end locations captured if(markerpoints.size() >= 2){ latlng origin = markerpoints.get(0); latlng dest = markerpoints.get(1); //latlng next = markerpoints.get(2); // getting url google directions api string url = getdirectionsurl(origin, dest); downloadtask downloadtask = new downloadtask(); // start downloading json data google directions api downloadtask.execute(url); } } }); } private string getdirectionsurl(latlng origin,latlng dest ){ // origin of route string str_origin = "origin="+origin.latitude+","+origin.longitude; // destination of route string str_dest = "destination="+dest.latitude+","+dest.longitude; //string str_next = "next="+next.latitude+","+next.longitude; // sensor enabled string sensor = "sensor=false"; // building parameters web service string parameters = str_origin+"&"+str_dest+"&"+sensor; // output format string output = "json"; // building url web service string url = "https://maps.googleapis.com/maps/api/directions/"+output+"?"+parameters; return url; } public void onclick(view view) { intent intent = new intent(this, sms.class); intent.putextra("message_body",f); startactivity(intent); } /** method download json data url */ private string downloadurl(string strurl) throws ioexception{ string data = ""; inputstream istream = null; httpurlconnection urlconnection = null; try{ url url = new url(strurl); // creating http connection communicate url urlconnection = (httpurlconnection) url.openconnection(); // connecting url urlconnection.connect(); // reading data url istream = urlconnection.getinputstream(); bufferedreader br = new bufferedreader(new inputstreamreader(istream)); stringbuffer sb = new stringbuffer(); string line = ""; while( ( line = br.readline()) != null){ sb.append(line); } data = sb.tostring(); br.close(); }catch(exception e){ log.d("exception while downloading url", e.tostring()); }finally{ istream.close(); urlconnection.disconnect(); } return data; } // fetches data url passed private class downloadtask extends asynctask<string, void, string>{ // downloading data in non-ui thread @override protected string doinbackground(string... url) { // storing data web service string data = ""; try{ // fetching data web service data = downloadurl(url[0]); }catch(exception e){ log.d("background task",e.tostring()); } return data; } // executes in ui thread, after execution of // doinbackground() @override protected void onpostexecute(string result) { super.onpostexecute(result); parsertask parsertask = new parsertask(); // invokes thread parsing json data parsertask.execute(result); } } /** class parse google places in json format */ private class parsertask extends asynctask<string, integer, list<list<hashmap<string,string>>> >{ // parsing data in non-ui thread @override protected list<list<hashmap<string, string>>> doinbackground(string... jsondata) { jsonobject jobject; list<list<hashmap<string, string>>> routes = null; try{ jobject = new jsonobject(jsondata[0]); directionsjsonparser parser = new directionsjsonparser(); // starts parsing data routes = parser.parse(jobject); }catch(exception e){ e.printstacktrace(); } return routes; } // executes in ui thread, after parsing process @override protected void onpostexecute(list<list<hashmap<string, string>>> result) { arraylist<latlng> points = null; polylineoptions lineoptions = null; string distance = ""; string duration = ""; if(result.size()<1){ toast.maketext(getbasecontext(), "no points", toast.length_short).show(); return; } // traversing through routes for(int i=0;i<result.size();i++){ points = new arraylist<latlng>(); lineoptions = new polylineoptions(); // fetching i-th route list<hashmap<string, string>> path = result.get(i); // fetching points in i-th route for(int j=0;j<path.size();j++){ hashmap<string,string> point = path.get(j); if(j==0){ // distance list distance = (string)point.get("distance"); continue; }else if(j==1){ // duration list duration = (string)point.get("duration"); continue; } double lat = double.parsedouble(point.get("lat")); double lng = double.parsedouble(point.get("lng")); latlng position = new latlng(lat, lng); points.add(position); } // adding points in route lineoptions lineoptions.addall(points); lineoptions.width(3); lineoptions.color(color.red); } tvdistanceduration.settext("distance:"+distance + ", duration:"+duration); // drawing polyline in google map i-th route map.addpolyline(lineoptions); } } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.main, menu); return true; } } second activiy take string in textview , put sms body
package com.example.project; import android.app.activity; import android.app.pendingintent; import android.content.broadcastreceiver; import android.content.context; import android.content.intent; import android.content.intentfilter; import android.os.bundle; import android.telephony.smsmanager; import android.view.view; import android.widget.button; import android.widget.edittext; import android.widget.toast; public class sms extends activity { button btnsendsms; edittext txtphoneno; edittext txtmessage; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); intent intent = getintent(); string name = intent.getstringextra("message_body"); btnsendsms = (button) findviewbyid(r.id.btnsendsms); txtphoneno = (edittext) findviewbyid(r.id.txtphoneno); txtmessage = (edittext) findviewbyid(r.id.txtmessage); txtmessage.settext(name); /* intent sendintent = new intent(intent.action_view); sendintent.putextra("sms_body", "content of sms goes here..."); sendintent.settype("vnd.android-dir/mms-sms"); startactivity(sendintent); */ btnsendsms.setonclicklistener(new view.onclicklistener() { public void onclick(view v) { string phoneno = txtphoneno.gettext().tostring(); string message = txtmessage.gettext().tostring(); if (phoneno.length()>0 && message.length()>0) sendsms(phoneno, message); else toast.maketext(getbasecontext(), "please enter both phone number , message.", toast.length_short).show(); } }); } //---sends sms message device--- private void sendsms(string phonenumber, string message) { /* pendingintent pi = pendingintent.getactivity(this, 0, new intent(this, test.class), 0); smsmanager sms = smsmanager.getdefault(); sms.sendtextmessage(phonenumber, null, message, pi, null); */ string sent = "sms_sent"; string delivered = "sms_delivered"; pendingintent sentpi = pendingintent.getbroadcast(this, 0, new intent(sent), 0); pendingintent deliveredpi = pendingintent.getbroadcast(this, 0, new intent(delivered), 0); //---when sms has been sent--- registerreceiver(new broadcastreceiver(){ @override public void onreceive(context arg0, intent arg1) { switch (getresultcode()) { case activity.result_ok: toast.maketext(getbasecontext(), "sms sent", toast.length_short).show(); break; case smsmanager.result_error_generic_failure: toast.maketext(getbasecontext(), "generic failure", toast.length_short).show(); break; case smsmanager.result_error_no_service: toast.maketext(getbasecontext(), "no service", toast.length_short).show(); break; case smsmanager.result_error_null_pdu: toast.maketext(getbasecontext(), "null pdu", toast.length_short).show(); break; case smsmanager.result_error_radio_off: toast.maketext(getbasecontext(), "radio off", toast.length_short).show(); break; } } }, new intentfilter(sent)); //---when sms has been delivered--- registerreceiver(new broadcastreceiver(){ @override public void onreceive(context arg0, intent arg1) { switch (getresultcode()) { case activity.result_ok: toast.maketext(getbasecontext(), "sms delivered", toast.length_short).show(); break; case activity.result_canceled: toast.maketext(getbasecontext(), "sms not delivered", toast.length_short).show(); break; } } }, new intentfilter(delivered)); smsmanager sms = smsmanager.getdefault(); sms.sendtextmessage(phonenumber, null, message, sentpi, deliveredpi); } }
tvdistanceduration = (textview) findviewbyid(r.id.tv_distance_time); //collecting data string text = tvdistanceduration.gettext().tostring(); //sending activity intent = new intent(currentactivity.this,newactivity.class); //here 'mydata' key i.putextra("mydata",text); startactivity(i); from receiver activity, can collect data this
string arriveddata = getintent().getstringextra("mydata"); a detailed example can found here
the problem in code variable named f empty, because collecting text after initialization. if want collect data textview, must assign new value using textview.settext("new value") . , can collect data using f = tvdistanceduration.gettext().tostring();. f contain latest updated data.
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