GridView实现桌面图标显示案例

GridView实现桌面图标显示案例，供大家参考，具体内容如下用法与ListView类似，需要以下几步：1、定义实体类2、自定义适配器继承BaseAdapter3、定义GridView内部布局效果图：...

GridView实现桌面图标显示案例，供大家参考，具体内容如下

用法与ListView类似，需要以下几步：

1、定义实体类
2、自定义适配器继承BaseAdapter
3、定义GridView内部布局

效果图：

代码：

实体类：Icon.Java

package com.example.a16gridviewtest.entity;

public class Icon {
  private int iconId;
  private String name;

  public Icon(int iconId, String name) {
    this.iconId = iconId;
    this.name = name;
  }

  public int getIconId() {
    return iconId;
  }

  public void setIconId(int iconId) {
    this.iconId = iconId;
  }

  public String getName() {
    return name;
  }

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

自定义适配器：GridViewAdapter.java

package com.example.a16gridviewtest.adpater;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.a16gridviewtest.R;
import com.example.a16gridviewtest.entity.Icon;

import java.util.List;

public class GridViewAdapter extends BaseAdapter {

  private List<Icon> mData;
  private Context mContext;

  public GridViewAdapter(List<Icon> data, Context context) {
    this.mData = data;
    this.mContext = context;
  }

  @Override
  public int getCount() {
    return mData != null ? mData.size() : 0;
  }

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

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

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    if (convertView == null) {
      holder = new ViewHolder();
      convertView = LayoutInflater.from(mContext).inflate(R.layout.item_grid_icon, parent, false);
      holder.img_icon = convertView.findViewById(R.id.img_icon);
      holder.name = convertView.findViewById(R.id.txt_icon);www.cppcns.com
      convertView.setTag(holder);
    } else {
      holder = (ViewHolder) convertView.getTag();
    }
    holder.img_icon.setImageResource(mData.get(position).getIconId());
    holder.name.setText(mData.get(position).getName());
    return convertView;
  }

  class ViewHolder {
    private ImageView img_icon;
    private TextView name;
  }
}

MainAcitivity.java

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.gridview_layout);
    //视图层View
    GridView gridView = findViewById(R.id.gridView);
    //数据源Model
    ArrayList<Icon> list = new ArrayList<>();
    list.add(new Icon(R.mipmap.icon1,"QQ"));
    list.add(new Icon(R.mipmap.icon2,"微信"));
    list.add(new Icon(R.mipmap.icon3,"电话"));
    list.add(new Icon(R.mipmap.icon4,"照片"));
    list.add(new Icon(R.mipmap.icon5,"音乐"));
    list.add(new Icon(R.mipmap.icon6,"Chrome"));
    list.add(new Icon(R.mipmap.icon7,"百度"));
    //控制层Controller
    GridViewAdapter adapter = new GridViewAdapter(list,this);
    gridView.setAdapter(adapter);
    //绑定点击事件
    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Toast.makeText(getApplicationContext(), "你点击了第" + (position+1) + "项", Toast.LENGTH_SHORT).show();
      }
    });
  }
}

主布局文件：activity_main.XML

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/gridView"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:horizontalSpacing="10dp"
  android:verticalSpacing="10dp"
  android:numColumns="3" >

</GridView>

单个GridView布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:padding="5dp">

  <ImageView
    android:id="@+id/img_icon"
    android:layout_width="64dp"
    android:layout_height="64dp"
    android:ljavascriptayout_centerInParent="true"
    android:src="@mipmap/icon1" />

  <TextView
    android:id="@+id/txt_icon"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/img_icon"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="30dp"
    android:text="QQ"
    android:textSize="18sp" />
 
</RelativeLayout>
id/img_icon"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="30dp"
    android:text="QQ"
    android:textSize="18sp" />
 
</RelativeLayout>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。