缩略图与gridview中的实际图像不同

Question

I have created a simple GridView application in android in which the images when clicked opens up in a new window as fullscreen .

Application image :

I also put the random image generation code in the getView method as follows in ImageAdapter Class:

@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
    ImageView iv;
    shuffleArray(images);
    if(arg1!=null){
        iv=(ImageView)arg1;
    }else{
        iv=new ImageView(context);
        iv.setLayoutParams(new GridView.LayoutParams(80,80)); //resizing the picture according to the params
        iv.setScaleType(ScaleType.CENTER_CROP);//images will be cropped towards center
        iv.setPadding(8, 8, 8, 8); //padding of all sides if images vary then less padding more crop to fit imageview
    }

    iv.setImageResource( images[arg0]);
    return iv;
}

static void shuffleArray(int[] images2) {
    // TODO Auto-generated method stub
    Random rnd=new Random();
    for(int i=images2.length-1;i>=0;i--){
        int index=rnd.nextInt(i+1);
        int temp=images2[index];
        images2[index]=images2[i];
        images2[i]=temp;
    }

}

Every time I open app the pictures get shuffled with some problems.

Now the problem is as follows :

• Whenever I click on the image thumbnail a different image opens in a new window .

• Same image thumbnail is showing in GridView Activity for two or more different images.

• I am also trying to put a condition that the app when run should have all Hardware buttons Disabled

AND

• whenever user clicks on a specific NO of images the app should close automatically with message .

How should I achieve solutions of problems mentioned above ?

my whole source code: Main Activity.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    GridView gv=(GridView)findViewById(R.id.gridView);
    gv.setAdapter(new ImageAdapter(getApplicationContext()));

    gv.setOnItemClickListener(new OnItemClickListener(){

        private boolean[] isSpecificImage;{
            isSpecificImage[0]=true;
        }





        @Override
        public void onItemClick(AdapterView<?> parentView, View iv, int position, long id) {
            // TODO Auto-generated method stub

                Toast.makeText(getApplicationContext(), ""+position, Toast.LENGTH_SHORT).show();
                Intent i=new Intent(getApplicationContext(),ImageDetail.class);  // for click open that image as new activity
                i.putExtra("id", position);
                startActivity(i);



        }

    });

ImageAdapter class

public class ImageAdapter extends BaseAdapter {

private Context context; public static int[] images={ R.drawable.goku,R.drawable.gohan,R.drawable.vegeta,R.drawable.broly,R.drawable.buu };

public ImageAdapter(Context applicationContext) {
     context = applicationContext;
        shuffleArray(images);
}

@Override
public int getCount() {
    // no of items to be displayed
    return images.length;
}

@Override
public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getItemId(int arg0) {
    // TODO Auto-generated method stub
    return 0;
}


@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
    ImageView iv;

    if(arg1!=null){
        iv=(ImageView)arg1;
    }else{
        iv=new ImageView(context);
        iv.setLayoutParams(new GridView.LayoutParams(80,80)); //resizing the picture according to the params
        iv.setScaleType(ScaleType.CENTER_CROP);//images will be cropped towards center
        iv.setPadding(8, 8, 8, 8); //padding of all sides if images vary then less padding more crop to fit imageview
    }

    iv.setImageResource( images[arg0]);
    return iv;
}

 void shuffleArray(int[] images2) {
    // TODO Auto-generated method stub
    Random rnd=new Random();
    for(int i=images2.length-1;i>=0;i--){
        int index=rnd.nextInt(i+1);
        int temp=images2[index];
        images2[index]=images2[i];
        images2[i]=temp;
    }

}

}

ImageDetail class

public class ImageDetail extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.imagedetail);
    Intent i=getIntent();
    int position =(Integer) i.getExtras().get("id");
    ImageView iv=(ImageView)findViewById(R.id.ivdbz);
    iv.setImageResource(ImageAdapter.images[position]);
}

}

Answer 1

shuffleArray(images); 

That statement does not belong in getView() . You should not shuffle every time getView() is called.

Call it somewhere else.

Answer 2

Well you can work with the positions in the OnClickItemListener to put finish()

condition in your gridView