Android development-listening for mobile phone calls

Android development-listening for mobile phone calls

TelephonyManager is a service class that manages the call status and network information of a mobile phone. It provides a large number of getXxx () methods to obtain information about the telephone network. For details about TelephonyManager, refer to Android development to obtain SIM card information of mobile phones.

Program running result:

Log_phone file:

Application instance: <喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> Vc3ryb25np1_vcd4kpghypgo8cd48l3a + CjxwcmUgY2xhc3M9 "brush: java;"> package com. jph. monitorphone; import java. io. fileNotFoundException; import java. io. fileOutputStream; import java. io. printStream; import java. text. simpleDateFormat; import java. util. date; import android. OS. bundle; import android. app. activity; import android. content. context; import android. telephony. phoneStateListener; import android. telephony. telephonyManager;/*** Describe:
* Monitoring mobile phone calls * This instance monitors the current phone call status, and writes future calls and answer records to the log_phone file * @ author jph * Date: 2014.07.22 **/public class MonitorPhone extends Activity {TelephonyManager tManager; private String incomingNumber; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); // obtain the system's TelephonyManager object tManager = (TelephonyManager) getSystemService (Context. TELEPHONY_SERVICE); // create a call status listener PhoneStateListener pListener = new PhoneStateListener () {@ Overridepublic void onCallStateChanged (int state, String number) {// TODO Auto-generated method stubswitch (state) {case TelephonyManager. CALL_STATE_IDLE: // No status break; case TelephonyManager. CALL_STATE_OFFHOOK: // call writeFile (state, number); break; case TelephonyManager. CALL_STATE_RINGING: // incoming call incomingNumber = number; writeFile (state, number); break; default: break;} super. onCallStateChanged (state, incomingNumber) ;}}; // Add listener tManager for tManager. listen (pListener, PhoneStateListener. LISTEN_CALL_STATE);} // write the incoming call information to the file protected void writeFile (int state, String number) {// TODO Auto-generated method stubStringBuffer sb = new StringBuffer (); SimpleDateFormat sdf = new SimpleDateFormat ("yyyy-MM-dd hh. mm. ss "); sb. append ("time:" + sdf. format (new Date () + "\ n"); switch (state) {case TelephonyManager. CALL_STATE_OFFHOOK: // calls sb. append ("received phone number:" + incomingNumber + ""); break; case TelephonyManager. CALL_STATE_RINGING: // call sb. append (number + "Incoming call"); break;} sb. append ("\ n --------------------- \ n"); FileOutputStream fos = null; try {// open the output stream fos = openFileOutput ("log_phone", MODE_APPEND) in append mode );} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke. printStackTrace () ;}// encapsulate the output stream into the PrintStream object PrintStream ps = new PrintStream (fos); // The input file content ps. println (sb. toString (); // close the output stream ps. close ();}}
Finally, do not forget to add the corresponding permissions to the application:

AndroidManifest. xml

Instance analysis:

This application is implemented through Activity. If you put the code in the instance to the Service that is executed in the background and set the Service component to start with the system, then this listener can be "unknown, you don't know. Hey .............