GridViewDemo

 1 package com.example.shad_fnst.gridviewdemo;
 2 
 3 import android.app.Activity;
 4 import android.support.v7.app.ActionBarActivity;
 5 import android.os.Bundle;
 6 import android.view.Menu;
 7 import android.view.MenuItem;
 8 import android.widget.GridView;
 9 
10 
11 public class MainActivity extends Activity {
12 
13     @Override
14     protected void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.activity_main);
17 
18         GridView gridView = (GridView) findViewById(R.id.gridview);
19         gridView.setAdapter(new ImageAdapter(this));
20     }
21 
22     @Override
23     public boolean onCreateOptionsMenu(Menu menu) {
24         // Inflate the menu; this adds items to the action bar if it is present.
25         getMenuInflater().inflate(R.menu.menu_main, menu);
26         return true;
27     }
28 
29     @Override
30     public boolean onOptionsItemSelected(MenuItem item) {
31         // Handle action bar item clicks here. The action bar will
32         // automatically handle clicks on the Home/Up button, so long
33         // as you specify a parent activity in AndroidManifest.xml.
34         int id = item.getItemId();
35 
36         //noinspection SimplifiableIfStatement
37         if (id == R.id.action_settings) {
38             return true;
39         }
40 
41         return super.onOptionsItemSelected(item);
42     }
43 }

 1 package com.example.shad_fnst.gridviewdemo;
 2 
 3 import android.content.Context;
 4 import android.view.View;
 5 import android.view.ViewGroup;
 6 import android.widget.BaseAdapter;
 7 import android.widget.GridView;
 8 import android.widget.ImageView;
 9 
10 import java.util.Objects;
11 
12 /**
13  * Created by shad-fnst on 2015/08/04.
14  */
15 public class ImageAdapter extends BaseAdapter {
16     private Context mContext;
17 
18     //keep all Images in array
19     public Integer[] mThumbIds = {
20             R.drawable.sample2, R.drawable.sample3,
21             R.drawable.sample4, R.drawable.sample5,
22             R.drawable.sample6, R.drawable.sample7,
23             R.drawable.sample0, R.drawable.sample1,
24             R.drawable.sample2, R.drawable.sample3,
25             R.drawable.sample4, R.drawable.sample5,
26             R.drawable.sample6, R.drawable.sample7,
27             R.drawable.sample0, R.drawable.sample1,
28             R.drawable.sample2, R.drawable.sample3,
29             R.drawable.sample4, R.drawable.sample5,
30             R.drawable.sample6, R.drawable.sample7,
31     };
32 
33     //Constructor
34     public ImageAdapter(Context context){
35         mContext = context;
36     }
37 
38     public int getCount(){
39         return mThumbIds.length;
40     }
41 
42     public Object getItem(int position){
43         return null;
44     }
45 
46     public long getItemId(int position){
47         return  0;
48     }
49 
50     //create a new ImageView for each item referenced by the Adapter
51     public View getView(int position, View convertView, ViewGroup parent){
52         ImageView imageView;
53         if(convertView == null){
54             imageView = new ImageView(mContext);
55             imageView.setLayoutParams(new GridView.LayoutParams(115, 115));
56             imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
57             imageView.setPadding(8, 8, 8, 8);
58         }else{
59             imageView =(ImageView) convertView;
60         }
61 
62         imageView.setImageResource(mThumbIds[position]);
63         return imageView;
64     }
65 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <GridView xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:paddingLeft="@dimen/activity_horizontal_margin"
 6     android:paddingRight="@dimen/activity_horizontal_margin"
 7     android:paddingTop="@dimen/activity_vertical_margin"
 8     android:paddingBottom="@dimen/activity_vertical_margin"
 9     android:id="@+id/gridview"
10     android:columnWidth="120dp"
11     android:numColumns="auto_fit"
12     android:verticalSpacing="10dp"
13     android:horizontalSpacing="10dp"
14     android:stretchMode="columnWidth"
15     android:gravity="center">
16 </GridView>