The 86th chapter, System service Telephony_service (learn Android from scratch)

The Telephonymanager class provides a series of get methods for accessing status and information related to mobile communication. These include mobile SIM status and information, the status of the telecommunications network, and the information of mobile phone users. You can use these get methods in your application to get related data.

Objects of the Telephonymanager class can be obtained by means of the Context.getsystemservice (Context.telephony_service) method, and it is important to note that the acquisition of some communication information has certain limitations on the permissions of the application. , you need to add the appropriate permissions for the development.

First, the design interface

1. layout file

Open the Res/layout/activity_main.xml file.
Enter the following code:

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2. <? XML version= "1.0" encoding="Utf-8"?>
4. <LinearLayout
6. xmlns:android="http://schemas.android.com/apk/res/android"
8. android:layout_width="match_parent"
10. android:layout_height="match_parent"
12. android:orientation="vertical" >
16. <Button
18. android:id="@+id/getphoneinfo"
20. android:layout_width="wrap_content"
22. android:layout_height="wrap_content"
24. android:text="Get mobile network Information" />
28. </linearlayout>

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout     xmlns:android= "http://schemas.android.com/apk/ Res/android "    android:layout_width=" match_parent "    android:layout_height=" match_parent "    android:o rientation= "vertical" >    <button        android:id= "@+id/getphoneinfo" android:layout_width= "Wrap_        Content "        android:layout_height=" wrap_content "        android:text=" Get mobile network Information "/></linearlayout>

Ii. Procedure Documents

Open the "Src/com.genwoxue.contentprovider_b/mainactivity.java" file.
Then enter the following code:

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2. Package com.genwoxue.telephony;
8. Import Android.os.Bundle;
10. Import Android.view.View;
12. Import Android.view.View.OnClickListener;
14. Import Android.widget.Button;
16. Import Android.widget.EditText;
18. Import Android.widget.Toast;
20. Import android.app.Activity;
22. Import Android.telephony.TelephonyManager;
24. Import Android.content.Context;
28. Public class Mainactivity extends Activity {
32. private Button btnget=null;
36. @Override
38. protected void OnCreate (Bundle savedinstancestate) {
40. super.oncreate (savedinstancestate);
42. Setcontentview (R.layout.activity_main);
46. btnget= (Button)Super.findviewbyid (r.id.getphoneinfo);
48. Btnget.setonclicklistener (new Onclicklistener () {
50. public void OnClick (View v)
52. {
54. StringBuilder info=New StringBuilder ();
56. //Get Telephonymanager service
58. Telephonymanager telphony= (Telephonymanager) mainactivity.  This.getsystemservice (Context.telephony_service);
60. //Get the name of the mobile service provider
62. Info.append (Telphony.getnetworkoperatorname () +"☆☆☆");
64. //Get device number
66. Info.append (Telphony.getdeviceid () +"☆☆☆");
70. Toast.maketext (Getapplicationcontext (), info, Toast.length_long). Show ();
72. }
74. });
76. }
78. }

Package Com.genwoxue.telephony;import Android.os.bundle;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.edittext;import Android.widget.toast;import Android.app.activity;import Android.telephony.telephonymanager;import Android.content.context;public class Mainactivity extends Activity {private Button btnget=null; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); btnget= (Button) Super.findviewbyid (r.id.getphoneinfo); Btnget.setonclicklistener (new Onclicklistener () {public void        OnClick (View v) {StringBuilder info=new StringBuilder (); Get Telephonymanager service Telephonymanager telphony= (Telephonymanager) MainActivity.this.getSystemService (        Context.telephony_service);        Get the name of the mobile provider Info.append (Telphony.getnetworkoperatorname () + "☆☆☆"); Get device number Info.append (Telphony.getdeviceid () + "☆☆☆");        Toast.maketext (Getapplicationcontext (), info, Toast.length_long). Show (); }        });}}

Iii. Configuration Files

Open the "androidmanifest.xml" file.

Then enter the following code:

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2. <? XML version= "1.0" encoding="Utf-8"?>
4. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
6. package="Com.genwoxue.telephony"
8. android:versioncode="1"
10. android:versionname="1.0" >
14. <uses-sdk
16. android:minsdkversion="one"
18. android:targetsdkversion=" /> "
22. <uses-permission android:name="Android.permission.READ_PHONE_STATE"/>
26. <application
28. android:allowbackup="true"
30. android:icon="@drawable/ic_launcher"
32. android:label="@string/app_name"
34. android:theme="@style/apptheme" >
36. <activity
38. android:name="com.genwoxue.telephony.MainActivity"
40. android:label="@string/app_name" >
42. <intent-filter>
44. <action android:name="Android.intent.action.MAIN" />
48. <category android:name="Android.intent.category.LAUNCHER" />
50. </intent-filter>
52. </Activity>
54. </Application>
58. </manifest>  

<?xml version= "1.0" encoding= "Utf-8"? ><manifest xmlns:android= "http://schemas.android.com/apk/res/        Android "package=" Com.genwoxue.telephony "android:versioncode=" 1 "android:versionname=" 1.0 "> <uses-sdk android:minsdkversion= "one" android:targetsdkversion= "/> <uses-permission android:name=" Android Oid.permission.READ_PHONE_STATE "/> <application android:allowbackup=" true "android:icon=" @drawable/            Ic_launcher "android:label=" @string/app_name "android:theme=" @style/apptheme "> <activity Android:name= "com.genwoxue.telephony.MainActivity" android:label= "@string/app_name" > <i ntent-filter> <action android:name= "Android.intent.action.MAIN"/> <category and Roid:name= "Android.intent.category.LAUNCHER"/> </intent-filter> </activity> </appl Ication></manifest>

Note: You need to add permissions to the Androidmanifest.xml file:

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

Iv. Results of operation