简单拨打电话程序

众所周知,对于一个手机,能拨打电话是其最重要也是最常用的一个功能.而在Android里是怎么样实现拨打电话的程序呢?我在这里写了一个简单的拨打电话的Demo,供大家参考.一共分为5个步骤.

Step 1:新建一个Android工程,命名为phoneCallDemo.

Step 2:设计程序的界面,打开main.xml把内容修改如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
??? android:orientation="vertical"
??? android:layout_width="fill_parent"
??? android:layout_height="fill_parent"
??? >
<TextView?
??? android:layout_width="fill_parent"
??? android:layout_height="wrap_content"
??? android:text="Please input the phoneNumer:"
??? />
<EditText
?android:id="@+id/et1"
?android:layout_width="fill_parent"
?android:layout_height="wrap_content"
?android:phoneNumber="true"
/>
<Button
?android:id="@+id/bt1"
?android:layout_width="wrap_content"
?android:layout_height="wrap_content"
?android:text="Call Phone"
/>
</LinearLayout>

Step 3:增加拨打电话的权限,打开AndroidManifest.xml,修改代码如下:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
????? package="com.android.test"
????? android:versionCode="1"
????? android:versionName="1.0">
??? <application android:icon="@drawable/icon" android:label="@string/app_name">
??????? <activity android:name=".PhoneCallDemo"
????????????????? android:label="@string/app_name">
??????????? <intent-filter>
??????????????? <action android:name="android.intent.action.MAIN" />
??????????????? <category android:name="android.intent.category.LAUNCHER" />
??????????? </intent-filter>
??????? </activity>

??? </application>
??? <uses-sdk android:minSdkVersion="3" />
?<!-- 添加拨出电话的权限 -->
?<uses-permission android:name="android.permission.CALL_PHONE">
?</uses-permission>
</manifest>

Step 4:主程序phoneCallDemo.java代码如下:

package com.android.test;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class PhoneCallDemo extends Activity {
??
?private Button bt;
?private EditText et;
??? public void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);
??????? setContentView(R.layout.main);
???????
??????? //取得资源
??????? bt = (Button)findViewById(R.id.bt1);
??????? et = (EditText)findViewById(R.id.et1);
???????
??????? //增加事件响应
??????? bt.setOnClickListener(new Button.OnClickListener(){

?? @Override
?? public void onClick(View v) {
???
??? //取得输入的电话号码串
??? String inputStr = et.getText().toString();
??? //如果输入不为空创建打电话的Intent
??? if(inputStr.trim().length()!=0)
??? {
???? Intent phoneIntent = new Intent("android.intent.action.CALL",
?????? Uri.parse("tel:" + inputStr));
???? //启动
???? startActivity(phoneIntent);
??? }
??? //否则Toast提示一下
??? else{
???? Toast.makeText(PhoneCallDemo.this, "不能输入为空", Toast.LENGTH_LONG).show();
??? }
?? }
????????
??????? });
??? }
}