Opening phone dialer from an Android application

Phone dialer is an activity available with Android operating system to call a number. In this article, we will create an application which invokes the dialer on a button click.  Android system provides a standard action name called “ACTION_DIAL” to invoke the dialer. We will make use this action to invoke the the dialer from our application.

1. Create a new Android project namely “DialerDemo”

Figure 1 : New Android Project

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2. Select build target for the application

Figure 2: Android Build Target

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3. Enter application details

Figure 3: Application Details

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4. res/values/strings.xml

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<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">Hello World, MainActivity!</string>     <string name="app_name">DialerDemo</string>     <string name="dialer">Open Dialer</string> </resources>

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5. res/layout/main.xml




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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >



<Button

    android:id="@+id/btn"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/dialer" />



</LinearLayout>






6. src/in/wptrafficanalyzer/dialerdemo/MainActivity.java




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package in.wptrafficanalyzer.dialerdemo;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;



public class MainActivity extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);



        /** Referring to the button object of the main.xml layout */

        Button btn  = (Button) findViewById(R.id.btn);



        /**    Defining a click event listener    */

        OnClickListener listener = new OnClickListener() {

            @Override

            public void onClick(View v) {

                /** Creating an intent with the dialer's action name  */

                /** Since the intent is created with activity's action name, the intent is an implicit intent */

                Intent intent = new Intent("android.intent.action.DIAL");



                /** Starting the Dialer activity */

                startActivity(intent);

            }

        };



        /** Setting click event listener for the buttonS */

        btn.setOnClickListener(listener);

    }

}











Figure 4: Main Activity


On clicking the button "Open Dialer", the given below "Phone Dialer" will be opened"