android send sms, why this will fail? -

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to send sms wrote below code:

package com.sendsms;  import android.app.activity; import android.app.pendingintent; import android.content.intent; import android.os.bundle; import android.telephony.smsmanager; import android.view.view; import android.view.view.onclicklistener; import android.widget.button;  public class sendsmsactivity extends activity {     /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);         button new_btn = (button)findviewbyid(r.id.send_btn);         new_btn.setonclicklistener(new onclicklistener(){             @override             public void onclick(view v) {                 smsmanager sms = smsmanager.getdefault();                 sms.sendtextmessage("+8615959762862", null, "i love you", null, null);                 }         });     } }

the stack:

isms$stub$proxy.sendtext(string, string, string, pendingintent, pendingintent) line: 443     smsmanager.sendtextmessage(string, string, string, pendingintent, pendingintent) line: 87    sendsmsactivity$1.onclick(view) line: 23     button(view).performclick() line: 2408

make sure declare 

<uses-permission android:name="android.permission.send_sms"></uses-permission>

in manifest


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