android - add n number of views in scroll view

问题:

i am designing an app for android tablets. I have created a layout file which contains the application bar, next is some buttons. In the middle of the screen i want to have a horizontal scroll view inside which i need to show some images.

The number of images inside the scroll view depends upon the return data from the url. For this i am maintaining an array list. According to the size of the array i need to create the image views withing the scroll view.

I have placed all other buttons, textviews in the layout file and i need to make the above said view alone through coding, how to do this.

If the array size is 19, then the list of images within scroll view to be shown in the following order only

1  4  7  10  13  16  19
2  5  8  11  14  17    
3  6  9  12  15  18      

In iPad iBook apps library page, the books will be listed out in this way.

how to do this....

回答1:

not sure but can try approach like this

1- Create/inflate a horizontal scrollview ..
2- make for loop running i= 0 to x 
        where x= (totalCount/3)+(totalCount%3>0?1:0)
3- Create a  Linear layout with orientation vertical  
4- create one more loop form j=0 to 3 or (i+1)*3+j< totalCount
5- add your element layout in  Linear layout 
6 after the inner loop closed add Linear layout in horizontal scroll-view

• loop termination condition like the value of x may not be exact please check them

For making item clickable

1- take any view from  element layout like in you case image-view is good option  
 2- creates a class in you activity or better to extend you activity with clickListner.
 3- while creating the imageView for each element set this listener to all
 4- Set the data object or index  with element with image-view in tad using SetTag
 5- in Onclick function you will get image-view as argument and use getTag to get that data of attached with clicked element   

回答2:

Thanks to Dheeresh Singh

Following is my main.xml file

<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

        <LinearLayout
            android:id="@+id/linear_1"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="horizontal" >
        </LinearLayout>
</HorizontalScrollView>

i have my Horizontal scroll view in my main.xml file

public class LayoutActivity extends Activity 
//implements OnClickListener
{
    ViewGroup layout;
    LinearLayout lr;

    int x;
    int total = 4;
    int count = 0;
    LinearLayout lay;

    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        count = 0;
        layout = (ViewGroup)findViewById(R.id.linear_1);
        x = (total/3)+(total%3 > 0?1:0);;
        for(int i = 0; i < x; i++)
        {
            lr = new LinearLayout(this);
            lr.setOrientation(LinearLayout.VERTICAL);
            layout.addView(lr);
            for(int j = 0; j < 3; j++ )
            {
                count++;
                final View child = getLayoutInflater().inflate(R.layout.inflateview, null);
                lay = (LinearLayout)child.findViewById(R.id.threeByThree_tableRow1_1_Layout1);
                lay.setOnClickListener(new View.OnClickListener() 
                {   
                    @Override
                    public void onClick(View v) 
                    {
                        Toast.makeText(getApplicationContext(), "selected  id  is "+child.getId(), Toast.LENGTH_SHORT).show();
                    }
                });
                lr.addView(child);
                child.setId(count);
                if(i == total)
                {
                    break;
                }
            }
        }      
    }
}

in the above code i have lr is the LinearLayout to display it in vertical order and View child is the data which i need to show in both vertical and horizontal order.

Thanks a lot Dheeresh Singh