Android GridView中GridAdapter 用法详解

说到GridView Listview一定会提到他的adapter，现整理如下：

main.xml布局里面：

<GridView android:id="@+id/grid" android:layout_width="fill_parent" android:layout_height="fill_parent" android:columnWidth="70dp" android:numColumns="auto_fit" android:verticalSpacing="10dp" android:horizontalSpacing="10dp" android:stretchMode="columnWidth" android:gravity="center" />

gridview_item.xml：

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:layout_width="wrap_content" android:orientation="vertical" android:gravity="center" android:layout_gravity="center" > <LinearLayout android:layout_height="wrap_content" android:layout_width="wrap_content" android:orientation="vertical" android:gravity="center" android:layout_gravity="center"> <ImageView android:id="@+id/grid_icon" android:layout_height="80dip" android:layout_width="80dip" android:gravity="center" android:layout_gravity="center" > </ImageView> <TextView android:id="@+id/grid_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleLine="true" android:gravity="center" android:layout_gravity="center" android:textSize="13px" android:layout_marginTop="4dip" > </TextView> </LinearLayout> </FrameLayout>

java 代码：

GridView grid = (GridView) findViewById(R.id.grid); grid.setAdapter(new GridAdapter(this, mNameList, mDrawableList));

GridAdapter.java类：

package com.android.test; import java.util.ArrayList; import android.content.Context; import android.graphics.drawable.Drawable; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; public class GridAdapter extends BaseAdapter { private ArrayList<String> mNameList = new ArrayList<String>(); private ArrayList<Drawable> mDrawableList = new ArrayList<Drawable>(); private LayoutInflater mInflater; private Context mContext; LinearLayout.LayoutParams params; public GridAdapter(Context context, ArrayList<String> nameList, ArrayList<Drawable> drawableList) { mNameList = nameList; mDrawableList = drawableList; mContext = context; mInflater = LayoutInflater.from(context); params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); params.gravity = Gravity.CENTER; } public int getCount() { return mNameList.size(); } public Object getItem(int position) { return mNameList.get(position); } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { ItemViewTag viewTag; if (convertView == null) { convertView = mInflater.inflate(R.layout.gridview_item, null); // construct an item tag viewTag = new ItemViewTag((ImageView) convertView.findViewById(R.id.grid_icon), (TextView) convertView.findViewById(R.id.grid_name)); convertView.setTag(viewTag); } else { viewTag = (ItemViewTag) convertView.getTag(); } // set name viewTag.mName.setText(mNameList.get(position)); // set icon viewTag.mIcon.setBackgroundDrawable(mDrawableList.get(position)); viewTag.mIcon.setLayoutParams(params); return convertView; } class ItemViewTag { protected ImageView mIcon; protected TextView mName; /** * The constructor to construct a navigation view tag * * @param name * the name view of the item * @param size * the size view of the item * @param icon * the icon view of the item */ public ItemViewTag(ImageView icon, TextView name) { this.mName = name; this.mIcon = icon; } } }

到此，adapter的使用就算结束，效果图如下：