android项目1：打电话

一、效果图

二、步骤

1、画好主界面

/call/res/layout/activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7     <EditText
 8         android:id="@+id/editText_phoneNumber"
 9         android:layout_width="match_parent"
10         android:layout_height="wrap_content"
11         android:layout_weight="0.00"
12         android:ems="10" >
13 
14         <requestFocus />
15     </EditText>
16 
17     <Button
18         android:id="@+id/btn_call"
19         android:layout_width="match_parent"
20         android:layout_height="50dp"
21         android:layout_weight="0.00"
22         android:text="@string/btn_call" />
23 
24 </LinearLayout>

2、编好代码

com.fry.call_1.MainActivity

 1 package com.fry.call_1;
 2 
 3 
 4 
 5 
 6 
 7 import android.app.Activity;
 8 import android.content.Intent;
 9 import android.net.Uri;
10 import android.os.Bundle;
11 import android.view.View;
12 import android.view.View.OnClickListener;
13 import android.widget.Button;
14 import android.widget.EditText;
15 
16 
17 
18 public class MainActivity extends Activity{
19     private Button btn_call;//创建一个button对象
20     private EditText editText_phoneNumber;
21      protected void onCreate(Bundle savedInstanceState) {
22             super.onCreate(savedInstanceState);//父类操作
23             setContentView(R.layout.activity_main);//引入名为activity_main的界面
24             btn_call=(Button) findViewById(R.id.btn_call);//找id为btn_openActivity的button
25             editText_phoneNumber=(EditText) findViewById(R.id.editText_phoneNumber);
26             
27             //1、给按钮设置点击事件
28             btn_call.setOnClickListener(new OnClickListener() {//设置button点击监听
29                 
30                 @Override
31                 public void onClick(View v) {//onclick事件
32                     // TODO Auto-generated method stub
33                     //2、拿到编辑框中的号码
34                     String phoneNumber=editText_phoneNumber.getText().toString();
35                     //3、给这个号码打电话
36                     
37                     Intent intent=new Intent();//初始化intent
38                     intent.setAction("android.intent.action.CALL");
39                     intent.addCategory("android.intent.category.DEFAULT");
40                     intent.setData(Uri.parse("tel:"+phoneNumber));
41                     startActivity(intent);//打开activity
42                 }
43             });
44         }
45 }

3、设置好权限

/call/AndroidManifest.xml

 1 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 2     package="com.fry.call_1"
 3     android:versionCode="1"
 4     android:versionName="1.0" >
 5 
 6     <uses-permission android:name="android.permission.CALL_PHONE" />
 7     
 8     <uses-sdk
 9         android:minSdkVersion="8"
10         android:targetSdkVersion="19" />
11 
12     <application
13         android:allowBackup="true"
14         android:icon="@drawable/ic_launcher"
15         android:label="@string/app_name"
16         android:theme="@style/AppTheme" >
17         <activity
18             android:name="com.fry.call_1.MainActivity"
19             android:label="@string/app_name" >
20             <intent-filter>
21                 <action android:name="android.intent.action.MAIN" />
22 
23                 <category android:name="android.intent.category.LAUNCHER" />
24             </intent-filter>
25         </activity>
26         <activity android:name="com.fry.call_1.Activity01" android:exported="true"></activity>
27     </application>
28 
29 </manifest>