Android mobile phone Call Development example

The most common function of a mobile phone is to call and send text messages, how do we make calls through the program in Android development? This article gives a simple example of making a phone call using an Android phone.

Here are the specific steps to develop this instance:

First, a new Android project, named Phonecalldemo.

Second, design the interface of the program, open main.xml to modify the content as follows:

xml/html Code

2. <? XML version= "1.0" encoding="Utf-8"?>
6. 　　<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
10. 　　android:orientation="Vertical"
14. 　　Android:layout_width="Fill_parent"
18. 　　android:layout_height="Fill_parent"
22. 　　>
26. 　　<TextView
30. 　　Android:layout_width="Fill_parent"
34. 　　android:layout_height="Wrap_content"
38. 　　android:text="Please input the Phonenumer:"
42. 　　/>
46. 　　<EditText
50. 　　android:id="@+id/et1"
54. 　　Android:layout_width="Fill_parent"
58. 　　android:layout_height="Wrap_content"
62. 　　android:phonenumber="true"
66. 　　/>
70. 　　<Button
74. 　　android:id="@+id/bt1"
78. 　　Android:layout_width="Wrap_content"
82. 　　android:layout_height="Wrap_content"
86. 　　android:text="Call Phone"
90. 　　/>
94. 　　</linearlayout>

Third, increase the access to call, open Androidmanifest.xml, modify the code as follows:

xml/html Code

2. 　<? XML version= "1.0" encoding="Utf-8"?>
6. 　　<manifest xmlns:android="http://schemas.android.com/apk/res/android"
10. 　　package="Com.android.test"
14. 　　android:versioncode="1"
18. 　　Android:versionname="1.0">
22. 　　<application android:icon="@drawable/icon" android:label="@string/app_name">
26. 　　<activity android:name=". Phonecalldemo "
30. 　　Android:label="@string/app_name">
34. 　　<intent-filter>
38. 　　<action android:name="Android.intent.action.MAIN" />
42. 　　<category android:name="Android.intent.category.LAUNCHER" />
46. 　　</intent-filter>
50. 　　</activity> </application>
54. 　　<uses-sdk android:minsdkversion="3" />
58. 　　<uses-permission android:name="Android.permission.CALL_PHONE">
62. 　　</uses-permission>
66. 　　</manifest>

Four, the main program Phonecalldemo.java code is as follows:

Java code

2. Package com.android.test;   import android.app.Activity;
6. 　　Import android.content.Intent;
10. 　　Import Android.net.Uri;
14. 　　Import Android.os.Bundle;
18. 　　Import Android.view.View;
22. 　　Import Android.widget.Button;
26. 　　Import Android.widget.EditText;
30. 　　Import Android.widget.Toast;
34. public class Phonecalldemo extends Activity {
38. 　　Private Button BT;
42. 　　Private EditText et;
46. 　　Public void OnCreate (Bundle savedinstancestate) {
50. 　　Super.oncreate (savedinstancestate);
54. Setcontentview (R.layout.main);
58. 　　Access to resources
62. BT = (Button) Findviewbyid (R.ID.BT1);
66. ET = (EditText) Findviewbyid (R.ID.ET1);
70. 　　Increase incident Response
74. Bt.setonclicklistener (new Button.onclicklistener () { @Override
78. 　　Public void OnClick (View v) {
82. 　　Get the input phone string
86. String inputstr = Et.gettext (). toString ();
90. 　　If the input is not empty create a call intent
94. 　　if (Inputstr.trim (). Length ()! =0)
98. {
102. Intent phoneintent = new Intent ("Android.intent.action.CALL",
106. Uri.parse ("Tel:" + inputstr));
110. 　　Start
114. StartActivity (phoneintent);
118. }
122. 　　Otherwise, Toast prompts
126. 　　else{
130. Toast.maketext (Phonecalldemo.   This, "cannot be entered as empty", Toast.length_long). Show ();
134. }
138. }
142. });
146. }