mentech: Grid View Demo With Images

GridView is a ViewGroup that displays items in a two-dimensional, scrollable grid.

We are going to create a Grid View to show Images, where we can select each item via click.

so lets create simple app with default activity "GridViewActivity" and put this code inside it.

  
package com.rdc;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class GridViewActivity extends Activity {
    
 GridView gridView;
 
 static final String[] MOBILE_OS = new String[]{
  "Android", "iOS", "Windows", "Balckberry",
 };
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        gridView = (GridView) findViewById(R.id.gridView1);
        
        gridView.setAdapter(new ImageAdapter(this, MOBILE_OS));
        
        gridView.setOnItemClickListener(new OnItemClickListener(){
         public void onItemClick(AdapterView parent, View v, 
           int position, long id){
          Toast.makeText(getApplicationContext(),
          ((TextView) v.findViewById(R.id.grid_item_label))
          .getText(), Toast.LENGTH_SHORT).show();
         }
        });
    }
}

ImageAdapter.java

  
package com.rdc;


import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ImageAdapter extends BaseAdapter{
 
 
 private Context context;
 private final String[] mobileValues;
 
 public ImageAdapter(Context context, String[] 
   mobileValues){
  this.context=context;
  this.mobileValues=mobileValues;
 }
 
 public View getView(int position, View convertView, 
   ViewGroup parent){
  LayoutInflater inflater = (LayoutInflater) context
    .getSystemService(Context.
      LAYOUT_INFLATER_SERVICE);
  
  View gridView;
  if(convertView == null){
   gridView = new View(context);
   gridView = inflater.inflate(
     R.layout.mobile, null);
   
   TextView textView = (TextView) gridView.
     findViewById(R.id.grid_item_label);
   textView.setText(mobileValues[position]);
   
   ImageView imageView = (ImageView) gridView.
     findViewById(
       R.id.grid_item_image);
   String mobile = mobileValues[position];
  
   if(mobile.equals("Android")){
    imageView.setImageResource(
      R.drawable.android_logo);
   }
   else if(mobile.equals("iOS")){
    imageView.setImageResource(
      R.drawable.ios_logo);
   }
   else if(mobile.equals("Windows")){
    imageView.setImageResource(
      R.drawable.windows_logo);    
   }   
   else if(mobile.equals("BlackBerry")){
    imageView.setImageResource(
      R.drawable.ios_logo);
   }   
  }
  else{
   gridView = (View) convertView;
  }
  return gridView;
 }

 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return mobileValues.length;
 }

 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return null;
 }

 @Override
 public long getItemId(int position) {
  // TODO Auto-generated method stub
  return 0;
 }
}