Dynamic Grid Layout | 易学教程

问题

I want to implement grid, which will be populated dynamically. I want to know what is the best approach to implement this Relative layout(List View) or Grid Layout?

回答1:

You can generate a GridView dynamically.

GridView would contain of ImageView and TextView as per your need. You will have to use your custom adapter. In it's getView method, populate the ImageView and TextView.

Example:

GridView item.xml:

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

    <ImageView
        android:id="@+id/imgItem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/txtItem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:fontFamily="trebuchet"
        android:textColor="@android:color/black"
        android:textSize="15sp"
        android:textStyle="bold" />

</LinearLayout>

Java code:

A POJO class for item:

public class Item
{
    String title;
    Drawable image;
    //getter setter
}

Adapter class:

//getView method in your adapter class

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    View itemView = convertView;
    ViewHolder holder = null;

    if (itemView == null)
    {
        final LayoutInflater layoutInflater =
            (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        itemView = layoutInflater.inflate(resourceId, parent, false);

        holder = new ViewHolder();
        holder.imgItem = (ImageView) itemView.findViewById(R.id.imgItem);
        holder.txtItem = (TextView) itemView.findViewById(R.id.txtItem);
        itemView.setTag(holder);
    }
    else
    {
        holder = (ViewHolder) itemView.getTag();
    }

    Item item = getItem(position);
    holder.imgItem.setImageDrawable(item.getImage());
    holder.txtItem.setText(item.getTitle());

    return itemView;
}

Now add adapter data in your Activity class and then set that adapter to GridView.

Refer to this and this

Hope it helps.

回答2:

You want GridView. Easy example here. In your case, you will need to make an XML layout for each row to accommodate both your TextView and ImageView. Other answers here address that.

回答3:

Simply use GridView with a custom adapter. Each time you want the view to update, call notifyDataSetChanged() on the adapter.

来源：https://stackoverflow.com/questions/27416461/dynamic-grid-layout

标签

android

relativelayout

grid-layout