转载：

一、电话拨号器

以下案例模拟android电话拨号器的实现

AndroidManifest.xml清单列表

<? xml version="1.0" encoding="utf-8" ?>
< manifest xmlns:android ="http://schemas.android.com/apk/res/android"
package ="com.ljq.phone"
android:versionCode ="1"
android:versionName ="1.0" >
< application android:icon ="@drawable/icon" android:label ="@string/app_name" >
< activity android:name =".MainActivity"
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 ="7" />
< uses-permission android:name ="android.permission.CALL_PHONE" />
</ manifest >

main.xml布局文件

<? 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 ="请输入电话号码" />
< EditText android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
android:id ="@+id/phone" />
< Button android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:text ="拔打此号码"
android:id ="@+id/button" />
</ LinearLayout >

MainActivity类

package com.ljq.phone;

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;

public class MainActivity extends Activity {
private EditText phone = null ;

@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);

phone = (EditText) this .findViewById(R.id.phone);
Button button = (Button) this .findViewById(R.id.button);
button.setOnClickListener( new View.OnClickListener(){

public void onClick(View v) {
String tel = phone.getText().toString();
// 方法一，使用Intent目的：激活android组件
// Intent intent=new Intent();
// intent.setAction("android.intent.action.CALL");
// intent.setData(Uri.parse("tel:"+tel));
// 方法二
Intent intent = new Intent( " android.intent.action.CALL " , Uri.parse( " tel: " + tel));
// 方法的内部会自动为intent对象设置类别:android.intent.category.DEFAULT
startActivity(intent);
}
});
}
}

运行结果：

界面初始化

电话拨打效果

Android电话拨号器

转载：

一、电话拨号器

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