Basic GridView Layout in Android

Creating a Basic GridView Layout in android

 GridView is a viewGroup that displays items in a two-dimensional,scrollable grid. The grid items are automatically inserted to the layout using a ListAdapter.

Today i am gonna create a simple Gridview layout.Now  I prepare images which i want to show in grid layout and place them in res->drawable-hdpi folder.

Images in Drawable-hdpi which will be shown in Gridview

I go to activity_main.xml and drag gridview layout from Palette or I can also write code directly for gridview which will be like this:

activity_main.xml

Now  I create a new class by right clicking Src->Package folder->New->Class 

and called it "Gridadap.java" and write these codes.

import android.content.Context;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

public class Gridadap extends BaseAdapter{

public Integer[] ImageIds = { R.drawable.a, R.drawable.e,R.drawable.f

,R.drawable.r, R.drawable.v

 // these are the images to be shown in gridview

};

private Context mContext;

public Gridadap(Context c){

mContext=c;

}

@Override

public int getCount() {

return ImageIds.length;

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return ImageIds[position];

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return 0;

}

@Override

public View getView(int position, View arg1, ViewGroup arg2) {

// TODO Auto-generated method stub

ImageView iv = new ImageView(mContext);

iv.setImageResource(ImageIds[position]);

iv.setScaleType(ImageView.ScaleType.CENTER_CROP);

iv.setLayoutParams(new GridView.LayoutParams(70, 70));

return iv;

}

Gridadap.java

After that i write these codes in MainActivity.java and write these codes:

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

GridView gv1 = (GridView) findViewById(R.id.gridView1);

 gv1.setAdapter(new Gridadap(this));

MainActivity.java

Now my project is ready to run and it looks like this.

Running my project