AndroidUI设计——Gridview

最新推荐文章于 2024-09-20 11:40:10 发布

团子11

最新推荐文章于 2024-09-20 11:40:10 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/tuanzi11/article/details/49736235

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本文介绍了一个使用GridView展示水果信息的例子，并详细解释了如何实现水果名称显示、图片资源加载、选中状态显示及点击触发选择功能。通过自定义适配器，实现了图片的蒙版效果和选中状态的动态更新。

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例子效果：

这里写图片描述
这个例子里除了用了gridview还加了选中加蒙版和点击图片被选中。

代码：

Fruit

package com.example.administrator.mygridview;

/**
 * Created by Administrator on 2015/8/26.
 */
public class Fruit {
    private String name;
    private int img;
    public Fruit(String name,int img){
        this.name=name;
        this.img=img;
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getImg() {
        return img;
    }

    public void setImg(int img) {
        this.img = img;
    }
}

FruitAdapter

package com.example.administrator.mygridview;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

/**
 * Created by Administrator on 2015/8/26.
 */
public class FruitAdapter extends BaseAdapter {
    private List<Fruit> mFruits;
    private LayoutInflater mInflater;
    private boolean[] mMangerCheckBox;
    public FruitAdapter(LayoutInflater inflater, List<Fruit> date) {
        //将inflater
        mInflater = inflater;
        mFruits = date;
        mMangerCheckBox=new boolean[date.size()];
    }
    @Override
    public int getCount() {
        return mFruits.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder vh=null;
        if(convertView==null){
            convertView=mInflater.inflate(R.layout.fruit_gridview_activity,null);
            vh=new ViewHolder();
            vh.textview_name= (TextView) convertView.findViewById(R.id.textview_name);
            vh.imageview= (ImageView) convertView.findViewById(R.id.imageview);
            vh.imageview_tint= (ImageView) convertView.findViewById(R.id.imageview_tint);
            vh.checkbox= (CheckBox) convertView.findViewById(R.id.checkbox);
            convertView.setTag(vh);
        }else {
            vh= (ViewHolder) convertView.getTag();
        }
        Fruit fruit =mFruits.get(position);
        vh.textview_name.setText(fruit.getName());
        vh.imageview.setImageResource(fruit.getImg());
        vh.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                mMangerCheckBox[position]=isChecked;
                notifyDataSetChanged();
            }
        });
        vh.checkbox.setChecked(mMangerCheckBox[position]);
        if (mMangerCheckBox[position]){
            vh.imageview_tint.setVisibility(View.VISIBLE);
        }else {
            vh.imageview_tint.setVisibility(View.INVISIBLE);
        }
        return convertView;
    }
    class ViewHolder{
        TextView textview_name;
        ImageView imageview;
        ImageView imageview_tint;
        CheckBox checkbox;

    }
    public void itemSelect(int position){
        mMangerCheckBox[position]=!mMangerCheckBox[position];
        notifyDataSetChanged();
    }
}

MainActivity

package com.example.administrator.mygridview;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import java.util.ArrayList;
import java.util.List;


public class MainActivity extends Activity {
    private GridView mgridView;
    private List<Fruit> mFruits;
    private FruitAdapter mAdapter;
    private LayoutInflater mInflater;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mgridView = (GridView) findViewById(R.id.gridview);
        mInflater = getLayoutInflater();
        initData();
        mAdapter = new FruitAdapter(mInflater, mFruits);
        mgridView.setAdapter(mAdapter);
        mgridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                mAdapter.itemSelect(position);
            }
        });
    }

    private void initData() {
        mFruits = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Fruit apple = new Fruit("苹果", R.mipmap.apple);
            Fruit caomei = new Fruit("草莓", R.mipmap.caomei);
            Fruit lizhi = new Fruit("荔枝", R.mipmap.lizhi);
            Fruit cherry = new Fruit("樱桃", R.mipmap.cherry);
            mFruits.add(apple);
            mFruits.add(caomei);
            mFruits.add(lizhi);
            mFruits.add(cherry);
        }

    }

}