GridView动态添加View

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context=".activity.MainActivity">

    <GridView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/gridView"

        android:numColumns="4"></GridView>

</LinearLayout>

package com.pingyijinren.helloworld.model;

/**

 * Created by Administrator on 2016/6/3 0003.

 */

public class Article {

    private int imageId;

    private String name;

    public Article(int imageId,String name){

        this.imageId=imageId;

        this.name=name;

    }

    public int getImageId() {

        return imageId;

    }

    public String getName() {

        return name;

    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="match_parent"

    android:layout_height="match_parent">

    <ImageView

        android:layout_width="match_parent"

        android:layout_height="50dp"

        android:id="@+id/image"/>

    <TextView

        android:layout_width="match_parent"

        android:layout_height="20dp"

        android:id="@+id/name"

        android:gravity="center"/>

</LinearLayout>

package com.pingyijinren.helloworld.adapter;

import android.content.Context;

import android.text.Layout;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.TextView;

import com.pingyijinren.helloworld.R;

import com.pingyijinren.helloworld.model.Article;

import java.util.ArrayList;

import java.util.List;

/**

 * Created by Administrator on 2016/6/3 0003.

 */

public class ArticleAdapter extends ArrayAdapter<Article>{

    private ArrayList<Article> arrayListArticle;

    public ArticleAdapter(Context context, int resource, List<Article> objects) {

        super(context, resource, objects);

        arrayListArticle=(ArrayList<Article>) objects;

    }

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder viewHolder;

        if(convertView==null){

            convertView= LayoutInflater.from(getContext()).inflate(R.layout.grid_item,null);

            viewHolder=new ViewHolder();

            viewHolder.image=(ImageView) convertView.findViewById(R.id.image);

            viewHolder.name=(TextView)convertView.findViewById(R.id.name);

            convertView.setTag(viewHolder);

        }

        else{

            viewHolder=(ViewHolder) convertView.getTag();

        }

        if(position<arrayListArticle.size()){

            Article article=getItem(position);

            viewHolder.image.setImageResource(article.getImageId());

            viewHolder.name.setText(article.getName());

        }

        else{

            viewHolder.image.setImageResource(R.drawable.plus);

            viewHolder.name.setText("");

        }

        return convertView;

    }

    private class ViewHolder{

        public ImageView image;

        public TextView name;

    }

    @Override

    public int getCount() {

        return arrayListArticle.size()+1;

    }

}

package com.pingyijinren.helloworld.adapter;

import android.content.Context;

import android.text.Layout;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.TextView;

import com.pingyijinren.helloworld.R;

import com.pingyijinren.helloworld.model.Article;

import java.util.ArrayList;

import java.util.List;

/**

 * Created by Administrator on 2016/6/3 0003.

 */

public class ArticleAdapter extends ArrayAdapter<Article>{

    private ArrayList<Article> arrayListArticle;

    public ArticleAdapter(Context context, int resource, List<Article> objects) {

        super(context, resource, objects);

        arrayListArticle=(ArrayList<Article>) objects;

    }

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder viewHolder;

        if(convertView==null){

            convertView= LayoutInflater.from(getContext()).inflate(R.layout.grid_item,null);

            viewHolder=new ViewHolder();

            viewHolder.image=(ImageView) convertView.findViewById(R.id.image);

            viewHolder.name=(TextView)convertView.findViewById(R.id.name);

            convertView.setTag(viewHolder);

        }

        else{

            viewHolder=(ViewHolder) convertView.getTag();

        }

        if(position<arrayListArticle.size()){

            Article article=getItem(position);

            viewHolder.image.setImageResource(article.getImageId());

            viewHolder.name.setText(article.getName());

        }

        else{

            viewHolder.image.setImageResource(R.drawable.plus);

            viewHolder.name.setText("");

        }

        return convertView;

    }

    private class ViewHolder{

        public ImageView image;

        public TextView name;

    }

    @Override

    public int getCount() {

        return arrayListArticle.size()+1;

    }

}

package com.pingyijinren.helloworld.activity;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.GridView;

import com.pingyijinren.helloworld.R;

import com.pingyijinren.helloworld.adapter.ArticleAdapter;

import com.pingyijinren.helloworld.model.Article;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private GridView gridView;

    private ArrayList<Article> arrayListArticle;

    private ArticleAdapter articleAdapter;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        gridView=(GridView)findViewById(R.id.gridView);

        arrayListArticle=new ArrayList<Article>();

        arrayListArticle.add(new Article(R.drawable.first_image,"frist"));

        arrayListArticle.add(new Article(R.drawable.second_image,"second"));

        articleAdapter=new ArticleAdapter(MainActivity.this,R.layout.grid_item,arrayListArticle);

        gridView.setAdapter(articleAdapter);

        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                if(position==arrayListArticle.size()){

                    arrayListArticle.add(new Article(R.drawable.third_image,"third"));

                    articleAdapter.notifyDataSetChanged();

                }

            }

        });

    }

}