{"id":1166,"date":"2012-12-09T16:32:38","date_gmt":"2012-12-09T14:32:38","guid":{"rendered":"http:\/\/examples.javacodegeeks.com\/?p=1166"},"modified":"2013-01-30T19:32:44","modified_gmt":"2013-01-30T17:32:44","slug":"android-button-example","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/","title":{"rendered":"Android Button Example"},"content":{"rendered":"<p>One of the most basic elements in any Graphical User Interface is the button. So in this post we&#8217;ll talk about creating a button and adding it to our application. Furthermore, we&#8217;ll show how to bundle a specific button with an action, which will occur every time the user presses the button.<br \/>\n&nbsp;<br \/>\n&nbsp;<br \/>\n&nbsp;<br \/>\n&nbsp;<br \/>\n&nbsp;<br \/>\n&nbsp;&nbsp;<br \/>\n&nbsp;<\/p>\n<p>For this tutorial, we will use the following tools in a Windows 64-bit platform:<\/p>\n<ol>\n<li>JDK 1.7<\/li>\n<li>Eclipse 4.2 Juno<\/li>\n<li>Android SKD 4.2<\/li>\n<\/ol>\n<div>\n<h3>1. Create a new Android Project<\/h3>\n<p>Open Eclipse IDE and go to File -&gt; New -&gt; Project -&gt; Android -&gt; Android Application Project.\u00a0You have to specify the Application Name, the Project Name and the Package name in the appropriate text fields and then click Next.<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-project.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1286\" title=\"create-new-project\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-project.jpg\" alt=\"\" width=\"619\" height=\"450\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-project.jpg 619w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-project-300x218.jpg 300w\" sizes=\"(max-width: 619px) 100vw, 619px\" \/><\/a><\/p>\n<p>In the next window make sure the \u201cCreate activity\u201d option is selected in order to create a new activity for your project, and click Next. This is optional as you can create a new activity after creating the project, but you can do it all in one step.<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-activity.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1287\" title=\"create-activity\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-activity.jpg\" alt=\"\" width=\"562\" height=\"468\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-activity.jpg 562w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-activity-300x249.jpg 300w\" sizes=\"(max-width: 562px) 100vw, 562px\" \/><\/a><\/p>\n<p>Select \u201cBlankActivity\u201d and click Next.<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-blanc-activity.jpg\"><img decoding=\"async\" title=\"create-blanc-activity\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-blanc-activity.jpg\" alt=\"\" width=\"535\" height=\"485\" \/><\/a><\/p>\n<p>You will be asked to specify some information about the new activity. In the Layout Name text field you have to specify the name of the file that will contain the layout description of your app. In our case the file\u00a0<code>res\/layout\/<span style=\"text-decoration: underline;\">main<\/span>.xml<\/code>\u00a0will be created.Then, click Finish.<div style=\"display:inline-block; margin: 15px 0;\"> <div id=\"adngin-JavaCodeGeeks_incontent_video-0\" style=\"display:inline-block;\"><\/div> <\/div><\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-activity-attributes2.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1301\" title=\"create-new-activity-attributes\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-activity-attributes2.jpg\" alt=\"\" width=\"625\" height=\"452\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-activity-attributes2.jpg 625w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/create-new-activity-attributes2-300x216.jpg 300w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<\/div>\n<h3>2. Adding a Button to your Application<\/h3>\n<p>Navigate to\u00a0<code>res\/layout\/main.xml<\/code>\u00a0file.<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/project-navigator2.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1288\" title=\"project-navigator\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/project-navigator2.jpg\" alt=\"\" width=\"427\" height=\"466\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/project-navigator2.jpg 427w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/project-navigator2-274x300.jpg 274w\" sizes=\"(max-width: 427px) 100vw, 427px\" \/><\/a><\/p>\n<p>This file is the layout description for the Activity you&#8217;ve created. When you open this file, Eclipse will display the graphical layout editor.<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/layout-graphical-editor.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1169\" title=\"layout-graphical-editor\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/layout-graphical-editor.jpg\" alt=\"\" width=\"728\" height=\"665\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/layout-graphical-editor.jpg 728w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/layout-graphical-editor-300x274.jpg 300w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><\/a><\/p>\n<p>This a very quick an easy tool in which you can create a simple User Interface. For example , you can Drag and Drop a Button from Form Widgets to the screen in the main Window. But when you need to customize it in greater detail you will have to use the traditional way, and that is editing the <code>main.xml<\/code> file by hand. So, click the <code>main.xml<\/code> tab in the bottom of the screen to open <code>main.xml<\/code>, and paste the following xml code.<\/p>\n<pre class=\"brush:xml\">&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"fill_parent\"\r\n    android:layout_height=\"fill_parent\"\r\n    android:orientation=\"vertical\" &gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/button1\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:text=\"www.javacodegeeks.com\" \/&gt;\r\n\r\n&lt;\/LinearLayout&gt;<\/pre>\n<p>Now if you click the Graphical Layout tab, you will see this:<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/graphical-layout-preview.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1170\" title=\"graphical-layout-preview\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/graphical-layout-preview.jpg\" alt=\"\" width=\"728\" height=\"665\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/graphical-layout-preview.jpg 728w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/graphical-layout-preview-300x274.jpg 300w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><\/a><\/p>\n<p>So you can always go back to Graphical Layout editor an preview the UI you create in the xml file.<\/p>\n<h3>3. Set an OnClickListener\u00a0for the button<\/h3>\n<p>Go to the java file of the activity and paste the following code:<\/p>\n<pre class=\"brush:java\">package com.javacodegeeks.android.buttonexample;\r\n\r\nimport android.app.Activity;\r\nimport android.content.Intent;\r\nimport android.net.Uri;\r\nimport android.os.Bundle;\r\nimport android.widget.Button;\r\nimport android.view.View;\r\nimport android.view.View.OnClickListener;\r\n\r\npublic class MainActivity extends Activity {\r\n\r\n\tprivate Button button;\r\n\r\n\t@Override\r\n\tpublic void onCreate(Bundle savedInstanceState) {\r\n\t\tsuper.onCreate(savedInstanceState);\r\n\t\tsetContentView(R.layout.main);\r\n\r\n\t\taddListenerOnButton();\r\n\r\n\t}\r\n\r\n\tpublic void addListenerOnButton() {\r\n\r\n        \/\/Select a specific button to bundle it with the action you want\r\n\t\tbutton = (Button) findViewById(R.id.button1);\r\n\r\n\t\tbutton.setOnClickListener(new OnClickListener() {\r\n\r\n\t\t\t@Override\r\n\t\t\tpublic void onClick(View view) {\r\n\r\n\t\t\t  Intent openBrowser =  new Intent(Intent.ACTION_VIEW, Uri.parse(\"http:\/\/www.javacodegeeks.com\"));\r\n\t\t\t  startActivity(openBrowser);\r\n\t\t\t}\r\n\r\n\t\t});\r\n\r\n\t}\r\n\r\n}<\/pre>\n<p>What the above code does is to select a specific button from the User Interface and bundles it with an OnClickListener. When a user clicks that button, onClick function is executed, which opens a browser tab in Java Code Geeks home page.<\/p>\n<h3>4. Run the application<\/h3>\n<p>This is the main screen of our application:<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/main-application-screen.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1173\" title=\"main-application-screen\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/main-application-screen.jpg\" alt=\"\" width=\"496\" height=\"838\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/main-application-screen.jpg 496w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/main-application-screen-177x300.jpg 177w\" sizes=\"(max-width: 496px) 100vw, 496px\" \/><\/a><\/p>\n<p>And \u00a0when you click the button a browser tab will open in Java Code Geeks home page:<\/p>\n<p><a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/browser-screen.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1174\" title=\"browser-screen\" src=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/browser-screen.jpg\" alt=\"\" width=\"496\" height=\"838\" srcset=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/browser-screen.jpg 496w, https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/browser-screen-177x300.jpg 177w\" sizes=\"(max-width: 496px) 100vw, 496px\" \/><\/a><\/p>\n<h3>Download Eclipse Project<\/h3>\n<p>This was an Android Button Example.Download the Eclipse Project of this tutorial\u00a0<a href=\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/AndroidButtonExample.zip\">AndroidButtonExample.zip<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most basic elements in any Graphical User Interface is the button. So in this post we&#8217;ll talk about creating a button and adding it to our application. Furthermore, we&#8217;ll show how to bundle a specific button with an action, which will occur every time the user presses the button. &nbsp; &nbsp; &nbsp; &hellip;<\/p>\n","protected":false},"author":7,"featured_media":1202,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[332],"tags":[270,265,267],"class_list":["post-1166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-button","tag-android-button","tag-android-core","tag-android-ui"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Android Button Example<\/title>\n<meta name=\"description\" content=\"One of the most basic elements in any Graphical User Interface is the button. 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So in this post we&#039;ll talk about creating a button and adding it to our\" \/>\n<meta property=\"og:url\" content=\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/\" \/>\n<meta property=\"og:site_name\" content=\"Examples Java Code Geeks\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/javacodegeeks\" \/>\n<meta property=\"article:published_time\" content=\"2012-12-09T14:32:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-01-30T17:32:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/android-logo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"150\" \/>\n\t<meta property=\"og:image:height\" content=\"150\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Ilias Tsagklis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@javacodegeeks\" \/>\n<meta name=\"twitter:site\" content=\"@javacodegeeks\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ilias Tsagklis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/\"},\"author\":{\"name\":\"Ilias Tsagklis\",\"@id\":\"https:\/\/examples.javacodegeeks.com\/#\/schema\/person\/ca18b1aa108e3bfadf717e563e0a7a6e\"},\"headline\":\"Android Button Example\",\"datePublished\":\"2012-12-09T14:32:38+00:00\",\"dateModified\":\"2013-01-30T17:32:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/\"},\"wordCount\":484,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/android-logo.jpg\",\"keywords\":[\"Android Button\",\"Android Core\",\"Android UI\"],\"articleSection\":[\"Button\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/\",\"url\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/\",\"name\":\"Android Button Example\",\"isPartOf\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/button\/android-button-example\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/android-logo.jpg\",\"datePublished\":\"2012-12-09T14:32:38+00:00\",\"dateModified\":\"2013-01-30T17:32:44+00:00\",\"description\":\"One of the most basic elements in any Graphical User Interface is the button. 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