{"id":1841,"date":"2013-01-21T18:07:58","date_gmt":"2013-01-21T16:07:58","guid":{"rendered":"http:\/\/examples.javacodegeeks.com\/?p=1841"},"modified":"2013-01-30T19:04:23","modified_gmt":"2013-01-30T17:04:23","slug":"android-gridview-example","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/android\/core\/ui\/gridview\/android-gridview-example\/","title":{"rendered":"Android GridView Example"},"content":{"rendered":"

One of the most usefull layouts in Android is the GridView<\/code>. GridView <\/code>organizes the items of your screen in a two-dimensional array (a grid…). In this tutorial you are going to see two examples of GridView<\/code>. In the first part we see the normal use of GridView<\/code>. In the second part we create our own customized GridView<\/code>.<\/p>\n

For this tutorial, we will use the following tools in a Windows 64-bit platform:<\/p>\n

    \n
  1. JDK 1.7<\/li>\n
  2. Eclipse 4.2 Juno<\/li>\n
  3. Android SKD 4.2<\/li>\n<\/ol>\n

     <\/p>\n

    Create a new Android Project<\/h3>\n

    Open Eclipse IDE and go to File -> New -> Project -> Android -> Android Application Project and click Next.<\/p>\n

    \"\"<\/a><\/p>\n

    You have to specify the Application Name, the Project Name and the Package name in the appropriate text fields and then click Next.<\/p>\n

    \"\"<\/a><\/p>\n

    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

    \"\"<\/a><\/p>\n

    Select \u201cBlankActivity\u201d and click Next.<\/p>\n

    \"\"<\/a><\/p>\n

    You will be asked to specify some information about the new activity. \u00a0In 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\u00a0res\/layout\/main.xml<\/code>\u00a0will be created. Then, click Finish.<\/p>\n

    \"\"<\/a><\/p>\n

    Normal GridView Example<\/span><\/h3>\n

    1.Create the main layout<\/h3>\n

    Open\u00a0res\/layout\/main.xml<\/code>\u00a0file :<\/p>\n

    \"\"<\/a><\/p>\n

    And paste the following code :<\/p>\n

    <?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<GridView xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:id=\"@+id\/gridView\"\r\n    android:layout_width=\"fill_parent\"\r\n    android:layout_height=\"fill_parent\"\r\n    android:columnWidth=\"50dp\"\r\n    android:gravity=\"center\"\r\n    android:numColumns=\"auto_fit\"\r\n    android:stretchMode=\"columnWidth\" >\r\n\r\n<\/GridView><\/pre>\n
    2. Code<\/h3>\n
    Go to the java file that contains the code of the activity\u00a0you\u2019ve\u00a0just created:<\/p>\n
    \"\"<\/a><\/p>\n
    And paste the following code:<\/p>\n
    package com.javacodegeeks.android.androidgridviewexample;\r\n\r\nimport android.app.Activity;\r\nimport android.os.Bundle;\r\nimport android.widget.AdapterView;\r\nimport android.widget.ArrayAdapter;\r\nimport android.widget.GridView;\r\nimport android.widget.TextView;\r\nimport android.widget.Toast;\r\nimport android.view.View;\r\nimport android.widget.AdapterView.OnItemClickListener;\r\n\r\npublic class MainActivity extends Activity {\r\n\r\n\tGridView grid;\r\n\r\n\tstatic final String[] letters = new String[] { \r\n\t\t\t\"A\", \"B\", \"C\", \"D\", \"E\",\r\n\t\t\t\"F\", \"G\", \"H\", \"I\", \"J\",\r\n\t\t\t\"K\", \"L\", \"M\", \"N\", \"O\",\r\n\t\t\t\"P\", \"Q\", \"R\", \"S\", \"T\",\r\n\t\t\t\"U\", \"V\", \"W\", \"X\", \"Y\", \"Z\"};\r\n\r\n\t@Override\r\n\tpublic void onCreate(Bundle savedInstanceState) {\r\n\t\tsuper.onCreate(savedInstanceState);\r\n\r\n\t\tsetContentView(R.layout.main);\r\n\r\n\t\tgrid = (GridView) findViewById(R.id.gridView);\r\n\r\n\t\tArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, letters);\r\n\r\n\t\tgrid.setAdapter(adapter);\r\n\r\n\t\tgrid.setOnItemClickListener(new OnItemClickListener() {\r\n\t\t\tpublic void onItemClick(AdapterView parent, View v, int position, long id) {\r\n\t\t\t   Toast.makeText(getApplicationContext(),\r\n\t\t\t\t((TextView) v).getText(), Toast.LENGTH_SHORT).show();\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t}\r\n\r\n}<\/pre>\n
    3. Run the application<\/h3>\n
    Go ahead and run the application to see how the layout looks on your emulator. This is the main screen of our application:
     
    <\/div> <\/div><\/p>\n
    \"\"<\/a><\/p>\n
    And when you click on a letter:<\/p>\n
    \"\"<\/a><\/p>\n
    Download Eclipse Project<\/h3>\n
    This was the first part of the Android GridView Example. Download the Eclipse Project of the first part of this tutorial:\u00a0AndroidGridViewExample_1.zip<\/a><\/p>\n
    Custom GridView Example<\/strong><\/span><\/h3>\n
    For this part you can create a new Android Project if you want, but I\u2019m going to use the old one.<\/p>\n
    1. Create the custom Layout<\/h3>\n
    The first thing you have to do for this part is to create a new xml Layout file that will describe the Layout of our custom GridView.<\/p>\n
    Go to the Package Explorer and right click on the\u00a0res\/layout\u00a0<\/code>folder. Select New -> Other -> Android -> Android XML Layout File. And click Next:<\/p>\n
    \"\"<\/a><\/p>\n
    Then specify the name of the file and the Layout type and click Finish:<\/p>\n
    \"\"<\/a><\/p>\n
    As you will see in the Package Explorer the new\u00a0\/res\/layout\/countries.xml<\/code>\u00a0file has been created:<\/p>\n
    \"\"<\/a><\/p>\n
    Open that file and paste the following code :<\/p>\n
    <?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"wrap_content\"\r\n    android:layout_height=\"wrap_content\"\r\n    android:padding=\"5dp\" >\r\n\r\n    <ImageView\r\n        android:id=\"@+id\/flag\"\r\n        android:layout_width=\"50sp\"\r\n        android:layout_height=\"50sp\"\r\n        android:layout_marginRight=\"10sp\">\r\n    <\/ImageView>\r\n\r\n    <TextView\r\n        android:id=\"@+id\/label\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:text=\"@+id\/label\"\r\n        android:layout_marginTop=\"15sp\"\r\n        android:textSize=\"15sp\" >\r\n    <\/TextView>\r\n\r\n<\/LinearLayout><\/pre>\n
    Now, go back to the \/res\/layout\/main.xml<\/code> and paste the following code :<\/p>\n
    <?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<GridView xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:id=\"@+id\/gridView\"\r\n    android:numColumns=\"auto_fit\"\r\n    android:gravity=\"center\"\r\n    android:columnWidth=\"160dp\"\r\n    android:stretchMode=\"columnWidth\"\r\n    android:layout_width=\"fill_parent\"\r\n    android:layout_height=\"fill_parent\" >\r\n\r\n<\/GridView><\/pre>\n
    2. Adding pictures in the appropriate project folder<\/h3>\n
    As you would have noticed in the Package explorer, there are 4 folders that contain the image resources of the project :<\/p>\n
      \n
    1. res\/drawable-hdpi<\/code><\/li>\n
    2. res\/drawable-ldpi<\/code><\/li>\n
    3. res\/drawable-mdpi<\/code><\/li>\n
    4. res\/drawable-hdpi<\/code><\/li>\n<\/ol>\n
      \"\"<\/a><\/p>\n
      You can copy the images you want to put in you\u2019re application in any one of these folders. \u00a0Android SDK will automatically\u00a0recognize any images you put on any one of these folders as drawable resources. So, copy the images\u00a0in the folder you want. If the image does not appear in the Package Explorer under the folder\u00a0you\u2019ve\u00a0copied it into, right click on the project name and select\u00a0Refresh. Now the image should be under the correct folder. As you can see,\u00a0I have four images in\u00a0res\/drawable-hdpi<\/code>:<\/p>\n
      \"\"<\/a><\/p>\n
      3. Create a Custom ArrayAdapter<\/h3>\n
      To create a custom\u00a0GridView\u00a0<\/code>you have to make your own\u00a0BaseAdapter<\/code>. To do that you have to to create a new class that will extend BaseAdapter<\/code>.<\/p>\n
      Go to the Package Explorer and right click on the package (in our case com.javacodegeeks.android.androidgridvieexample):<\/p>\n
      \"\"<\/a><\/p>\n
      Select New -> Class. Put the\u00a0appropriate\u00a0attributes as shown in the\u00a0picture\u00a0below:<\/p>\n
      \"\"<\/a><\/p>\n
      As you will see a new java file has been created:<\/p>\n
      \"\"<\/a><\/p>\n
      Open that file and paste the following code :<\/p>\n
      package com.javacodegeeks.android.androidgridviewexample;\r\n\r\nimport android.content.Context;\r\nimport android.view.LayoutInflater;\r\nimport android.view.View;\r\nimport android.view.ViewGroup;\r\nimport android.widget.BaseAdapter;\r\nimport android.widget.ImageView;\r\nimport android.widget.TextView;\r\n\r\npublic class MyAdapter extends BaseAdapter {\r\n\tprivate Context context;\r\n\tprivate final String[] countries;\r\n\r\n\tpublic MyAdapter(Context context, String[] countries) {\r\n\t\tthis.context = context;\r\n\t\tthis.countries = countries;\r\n\t}\r\n\r\n\tpublic View getView(int position, View convertView, ViewGroup parent) {\r\n\r\n\t\tLayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);\r\n\r\n\t\tView gridView;\r\n\r\n\t\tif (convertView == null) {\r\n\r\n\t\t\tgridView = new View(context);\r\n\r\n\t\t\tgridView = inflater.inflate(R.layout.countries, null);\r\n\r\n\t\t\tTextView textView = (TextView) gridView.findViewById(R.id.label);\r\n\r\n\t\t\ttextView.setText(countries[position]);\r\n\r\n\t\t\tImageView flag = (ImageView) gridView .findViewById(R.id.flag);\r\n\r\n\t\t\tString mobile = countries[position];\r\n\r\n\t\t\tif (mobile.equals(\"Greece\")) {\r\n\t\t\t\tflag.setImageResource(R.drawable.greekflag);\r\n\t\t\t} else if (mobile.equals(\"Germany\")) {\r\n\t\t\t\tflag.setImageResource(R.drawable.germanflag);\r\n\t\t\t} else if (mobile.equals(\"Italy\")) {\r\n\t\t\t\tflag.setImageResource(R.drawable.italianflag);\r\n\t\t\t} else {\r\n\t\t\t\tflag.setImageResource(R.drawable.britishflag);\r\n\t\t\t}\r\n\r\n\t\t} else {\r\n\t\t\tgridView = (View) convertView;\r\n\t\t}\r\n\r\n\t\treturn gridView;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic int getCount() {\r\n\t\treturn countries.length;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic Object getItem(int position) {\r\n\t\treturn null;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic long getItemId(int position) {\r\n\t\treturn 0;\r\n\t}\r\n\r\n}<\/pre>\n
      Now, go back to MainActivity.java<\/code> and paste the following code :<\/p>\n
      package com.javacodegeeks.android.androidgridviewexample;\r\n\r\nimport android.app.Activity;\r\nimport android.os.Bundle;\r\nimport android.widget.AdapterView;\r\nimport android.widget.GridView;\r\nimport android.widget.TextView;\r\nimport android.widget.Toast;\r\nimport android.view.View;\r\nimport android.widget.AdapterView.OnItemClickListener;\r\n\r\npublic class MainActivity extends Activity {\r\n\r\n\tGridView gridView;\r\n\r\n\tstatic final String[] MOBILE_OS = new String[] { \"Greece\", \"Germany\",\"Italy\", \"Britain\" };\r\n\r\n\t@Override\r\n\tpublic void onCreate(Bundle savedInstanceState) {\r\n\r\n\t\tsuper.onCreate(savedInstanceState);\r\n\t\tsetContentView(R.layout.main);\r\n\r\n\t\tgridView = (GridView) findViewById(R.id.gridView);\r\n\r\n\t\tgridView.setAdapter(new MyAdapter(this, MOBILE_OS));\r\n\r\n\t\tgridView.setOnItemClickListener(new OnItemClickListener() {\r\n\t\t\tpublic void onItemClick(AdapterView parent, View v,\r\n\t\t\t\t\tint position, long id) {\r\n\t\t\t\tToast.makeText(\r\n\t\t\t\t\t\tgetApplicationContext(),\r\n\t\t\t\t\t\t((TextView) v.findViewById(R.id.label)).getText(), Toast.LENGTH_SHORT).show();\r\n\r\n\t\t\t}\r\n\t\t});\r\n\r\n\t}\r\n\r\n}<\/pre>\n
      4. Run the application<\/h3>\n
      This is the main screen of our Application:<\/p>\n
      \"\"<\/a><\/p>\n
      Now, when you click on an item:<\/p>\n
      \"\"<\/a><\/p>\n
      Download Eclipse Project<\/h3>\n
      This was the second part of the Android GridView Example. Download the Eclipse Project of the second part of this tutorial:\u00a0AndroidGridViewExample_2.zip<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
      One of the most usefull layouts in Android is the GridView. GridView organizes the items of your screen in a two-dimensional array (a grid…). In this tutorial you are going to see two examples of GridView. In the first part we see the normal use of GridView. In the second part we create our own …<\/p>\n","protected":false},"author":6,"featured_media":1202,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[308],"tags":[265,292,267],"class_list":["post-1841","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gridview","tag-android-core","tag-android-gridview","tag-android-ui"],"yoast_head":"\nAndroid GridView Example<\/title>\n<meta name=\"description\" content=\"One of the most usefull layouts in Android is the GridView. GridView organizes the items of your screen in a two-dimensional array (a grid...). 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