Implement Simple GridView in Android App
Grid View is one that displays the data in two-dimensional scrolling grid. Adapter associated with the Gridview loads the data into the Gridview from different sources like array or cursor containing query result.
I am going to show you how to create simple Gridview having single Textview in each of the grids. Let’s start,
Create the new project as File->New->New Project. Give a project name as SimpleGrid-> rename MainActivity as SimpleGridActivity and select Finish.
Go to res->layout->activity_simple_grid.xml. Copy the below code in the Text tab of activity_simple_grid.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f0f0f0">
<GridView
android:id="@+id/gridView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:columnWidth="100dp"
android:drawSelectorOnTop="true"
android:gravity="center"
android:numColumns="3"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:focusable="true"
android:clickable="true"/>
</RelativeLayout>
Now create a new xml file that represents single grid item in res ->layout ->right_click -> grid_item.xml. Copy the below code in Text tab of grid_item.xml.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="120dp"
android:layout_height="120dp"
android:orientation="vertical"
android:background="#d7d2d2">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginTop="20dp"
android:textSize="20dp"
android:id="@+id/gridText"/>
</LinearLayout>
As I already mentioned that I am creating a grid view containing single Textview, that is why I am using ArrayAdapter of type String only. We will see the custom adapter for grid view as well. Open SimpleGridActivity.java from java directory and copy the below code.
package com.buzzmycode.simplegrid;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.GridView;
public class SimpleGridActivity extends AppCompatActivity {
ArrayAdapter<String> adapter;
String[] grid_array = {"Android OS (Google Inc.)",
"Bada (Samsung Electronics)",
"BlackBerry OS (Research In Motion)",
"iPhone OS / iOS (Apple)",
"MeeGo OS (Nokia and Intel)",
"Palm OS (Garnet OS)",
"Windows Mobile (Windows Phone 7)"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_simple_grid);
GridView gridView = (GridView) findViewById(R.id.gridView);
adapter = new ArrayAdapter<String>(SimpleGridActivity.this,R.layout.grid_item,R.id.gridText, grid_array);
gridView.setAdapter(adapter);
}
}
For a click on a grid, you need to add the onClick event in your SimpleGridActivity as follows.
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String seleted_grid = ((TextView)view.findViewById(R.id.gridText)).getText().toString();
Toast.makeText(SimpleGridActivity.this, "You select "+seleted_grid + " at position "+ i , Toast.LENGTH_LONG).show();
}
});
The final SimpleGridActivity will as below.
package com.buzzmycode.simplegrid;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
public class SimpleGridActivity extends AppCompatActivity {
ArrayAdapter<String> adapter;
String[] grid_array = {"Android OS (Google Inc.)",
"Bada (Samsung Electronics)",
"BlackBerry OS (Research In Motion)",
"iPhone OS / iOS (Apple)",
"MeeGo OS (Nokia and Intel)",
"Palm OS (Garnet OS)",
"Windows Mobile (Windows Phone 7)"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_simple_grid);
GridView gridView = (GridView) findViewById(R.id.gridView);
adapter = new ArrayAdapter<String>(SimpleGridActivity.this,R.layout.grid_item,R.id.gridText, grid_array);
gridView.setAdapter(adapter);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String seleted_grid = ((TextView)view.findViewById(R.id.gridText)).getText().toString();
Toast.makeText(SimpleGridActivity.this, "You select "+seleted_grid + " at position "+ i , Toast.LENGTH_LONG).show();
}
});
}
}
Your AndroidManifest.xml will be as below.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.buzzmycode.simplegrid">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".SimpleGridActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Now run the App you will have the following output.
Here we did with the simple Grid View with a click on its grid. Hope you understand it clearly, if you do not understand anything don’t hesitate to comment below. I would love to help you.
