Android基础－拨打电话程序

1. 布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <EditText 
        android:id="@+id/phoneNumber"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:phoneNumber="true"
        />
    
    <Button 
        android:id="@+id/BtnCall"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/call"
        />
    
</LinearLayout>

2. 拨打电话的程序

package com.example.phonecalldemo;

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 MainActivity extends Activity {

    public Button call;
    public EditText phoneNumber;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        call = (Button) findViewById(R.id.BtnCall);
        phoneNumber = (EditText)findViewById(R.id.phoneNumber);
        
        call.setOnClickListener(new Button.OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                String hm = phoneNumber.getText().toString();
                if(hm.trim().length()!=0)
                {
                    Intent intent = new Intent("android.intent.action.CALL",Uri.parse("tel:"+hm));
                    //start
                    startActivity(intent);
                }else{
                    Toast.makeText(MainActivity.this, "电话号码不能为空", Toast.LENGTH_LONG).show();
                }
                
            }
            
        });
        
    }


    
}

3. AndroidManifest.xml文件，申请打电话的权限。

<!-- 添加拨出电话的权限 --> 
    <uses-permission android:name="android.permission.CALL_PHONE"> 
    </uses-permission> 

 运行效果如下：