ide มองไม่เห็น mThumbIds ครับ ใน file ImageAdapter ทำไงดี
ประกาศ mThumbIds อยู่ใน MainActivity ครับ แต่ใน ImageAdapter ide มองไม่เห็น
ผมลอง ImageAdapter extends MainActivity ได้อยู่ แต่ใน MainActivity จะ error ตรง gridview.setAdapter( new ImageAdapter(this));
แล้วถ้าผม cast new ImageAdapter(this) เป็น ListAdapter ตามคำแนะนำของ ide ก็จะขึ้น ขออภัย app หยุดทำงาน
เป็น app android เกมจับคู่ภาพครับ
[open_code]
package com.nathatsoft.nathat.memorymatch;

import android.app.Activity;
import android.net.Uri;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.Toast;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;

import java.util.Random;

import android.app.Activity;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity implements
        AdapterView.OnItemClickListener {

    GridView gridview;
    ImageView imageView, firstView;
    // references to our images

    public Integer[] mThumbIds = {R.drawable.lemmling, R.drawable.monkey,
            R.drawable.obama, R.drawable.zebra, R.drawable.lemmling,
            R.drawable.monkey, R.drawable.obama, R.drawable.zebra};

    int opened = 0;
    int firstClick, secondClick;    //use for note
    int numColumns = 4;    //Number of GridView Columns

    // Implementing Fisher–Yates shuffle
    static void shuffleArray(Integer[] mThumbIds) {
        Random rnd = new Random();
        for (int i = mThumbIds.length - 1; i >= 0; i--) {
            int index = rnd.nextInt(i + 1);
            // Simple swap
            int a = mThumbIds[index];
            mThumbIds[index] = mThumbIds;
            mThumbIds = a;
        }
    }
    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    private GoogleApiClient client;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        shuffleArray(mThumbIds);

        GridView gridview = (GridView) findViewById(R.id.gridview);
        gridview.setNumColumns(numColumns);
        //gridview.setAdapter(new ImageAdapter(this));
        gridview.setAdapter( new ImageAdapter(this));
        gridview.setOnItemClickListener(this);

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
    }

    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    public Action getIndexApiAction() {
        Thing object = new Thing.Builder()
                .setName("Main Page") // TODO: Define a title for the content shown.
                // TODO: Make sure this auto-generated URL is correct.
                .setUrl(Uri.parse("http://host/path"))
                .build();
        return new Action.Builder(Action.TYPE_VIEW)
                .setObject(object)
                .setActionStatus(Action.STATUS_TYPE_COMPLETED)
                .build();
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

        imageView = (ImageView) v;
        imageView.setAdjustViewBounds(true);    //Adjust image in bound
        opened++;

        final Handler handler = new Handler();    // Handler for time delay

        if (opened == 1) {
            firstClick = position;
            firstView = (ImageView) v;
            imageView.setImageResource(mThumbIds[position]);
        } else if (opened == 2) {
            secondClick = position;
            imageView.setImageResource(mThumbIds[position]);
            imageView.setClickable(false);
            if (mThumbIds[firstClick].compareTo(mThumbIds[secondClick]) == 0) {
                Toast.makeText(MainActivity.this, "That's Great!",
                        Toast.LENGTH_SHORT).show();
                handler.postDelayed(removeImage, 400);
            } else {
                handler.postDelayed(cardBack, 600);
            }
        }
    }

    private Runnable removeImage = new Runnable() {
        @Override
        public void run() {
            imageView.setVisibility(View.GONE);
            firstView.setVisibility(View.GONE);
            opened = 0;
        }
    };

    private Runnable cardBack = new Runnable() {
        @Override
        public void run() {
            imageView.setImageResource(R.drawable.card_back);
            firstView.setImageResource(R.drawable.card_back);
            opened = 0;
        }
    };

    @Override
    public void onStart() {
        super.onStart();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client.connect();
        AppIndex.AppIndexApi.start(client, getIndexApiAction());
    }

    @Override
    public void onStop() {
        super.onStop();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        AppIndex.AppIndexApi.end(client, getIndexApiAction());
        client.disconnect();
    }
}
[/close_code]
[open_code]
package com.nathatsoft.nathat.memorymatch;

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

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;



public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

     public int getCount() {

        return mThumbIds.length;
    }


    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {
            // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            //imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            //imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

}

[/close_code]