Add call phone feature

app/src/main/java/com/samsao/sandbox/MainActivity.java

@@ -1,9 +1,12 @@
 package com.samsao.sandbox;
 
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 
 import butterknife.ButterKnife;
+import butterknife.OnClick;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -14,4 +17,10 @@ protected void onCreate(Bundle savedInstanceState) {
 
         ButterKnife.bind(this);
     }
+
+    @OnClick(R.id.main_telephone_button)
+    void onTelephoneButtonClick() {
+        Intent intent = new Intent(Intent.ACTION_DIAL, Uri.fromParts("tel", "5144321234", null));
+        startActivity(intent);
+    }
 }

app/src/main/res/layout/activity_main.xml

@@ -1,17 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/activity_main"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:padding="@dimen/double_spacing"
-    android:orientation="vertical"
-    tools:context="com.samsao.sandbox.MainActivity">
+              xmlns:tools="http://schemas.android.com/tools"
+              android:id="@+id/activity_main"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical"
+              android:padding="@dimen/double_spacing"
+              tools:context="com.samsao.sandbox.MainActivity">
 
     <Button
         android:id="@+id/main_maps_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Maps"/>
 
+    <Button
+        android:id="@+id/main_telephone_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Call telephone"/>
+
 </LinearLayout>

build.gradle

@@ -3,17 +3,19 @@
 buildscript {
     repositories {
         jcenter()
-        google()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
     }
 }
 
 allprojects {
     repositories {
         jcenter()
-        google()
     }
 }