Android Basics (3): Phone Dialer

Phone Dialer:

Permissions: Android.permission.CALL_PHONE

Layout code:

< Relativelayout 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"

Tools:context=". Mainactivity ">

< EditText

android:id="@+id/et_number"

android:layout_width="Match_parent"

android:layout_height="Wrap_content"

android:layout_alignparenttop="true"

android:ems="Ten"

Android:inputtype="Phone">

< Requestfocus />

</ EditText >

< Button

android:id="@+id/bt_dail"

android:layout_width="Wrap_content"

android:layout_height="Wrap_content"

android:layout_alignparentright="true"

Android:layout_below="@id/et_number"

Android:text="@string/dail"/>

</ Relativelayout >

Program code:

Package com.example.dail;

import Android.net.Uri;

import Android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.text.TextUtils;

import Android.view.View;

import Android.view.View.OnClickListener;

import Android.widget.Button;

import Android.widget.EditText;

import android.widget.Toast;

Public class Mainactivity extends Activity {

@Override

protected void onCreate (Bundle savedinstancestate) {

Super. OnCreate (savedinstancestate);

// Loading layout Files

Setcontentview (r.layout. Activity_main);

// Find button

Button bt_dail= (button) Findviewbyid (r.id. Bt_dail);

// register a Click event for a button

Bt_dail.setonclicklistener (new MyListener ());

}

Private class MyListener implements Onclicklistener

{

/**

        * how the button is clicked

*/

@Override

Public void OnClick (View arg0) {

EditText et_number= (EditText) Findviewbyid (r.id. Et_number);

String Number=et_number.gettext (). toString ();

// determine if the input is empty

if (Textutils. IsEmpty (number))

{

//toast.length_short This information is displayed for one second

Toast. Maketext (Mainactivity. This," number cannot be empty ", Toast. length_short). Show ();

return;

}

// intention to do something

Intent intent=New Intent ();

// the action of the intended counterpart

Intent.setaction (Intent. Action_call);

// the object that performs the action

Intent.setdata (Uri. Parse("Tel:"+number));

// open a new interface to perform this action

StartActivity (Intent);

}

}

}

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Android Basics (3): Phone Dialer