Android basic-dialing program

1. layout File

<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. Dialing procedure

MainActivity = String hm = (hm. trim (). length ()! = 0 = Intent ("android. intent. action. CALL", Uri. parse ("tel:" +, "the phone number cannot be blank"

3. AndroidManifest. xml file to apply for the permission to call.

<! -- Add the permission for dialing out --> <uses-permission android: name = "android. permission. CALL_PHONE"> </uses-permission>

The running effect is as follows: