GridView布局，自定义适配器，水平滚动

时间：2022-02-21 16:02:36

添加GridItem布局XML文件

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

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

    android:layout_width="100dp"

    android:layout_height="100dp"

    android:gravity="center"

    android:orientation="vertical" >

    <ImageView

        android:id="@+id/imageView1"

        android:layout_width="70dp"

        android:layout_height="70dp"

         />

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="TextView" />

</LinearLayout>

主界面添加GridView布局XML文件

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

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

    android:layout_width="fill_parent"

    android:layout_height="200dp"

    android:layout_gravity="center"

>

	<HorizontalScrollView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_margin="5dp" >

        <LinearLayout

            android:layout_width="wrap_content"

            android:layout_height="fill_parent"

            android:orientation="horizontal"

            android:layout_margin="10dp" >

			<GridView

		    android:id="@+id/gridView1"

		    android:layout_width="fill_parent"

		    android:layout_height="wrap_content"

			android:numColumns="auto_fit"

		    android:verticalSpacing="10dp"

			android:horizontalSpacing="10dp"

		    >

		    </GridView>

		</LinearLayout>

    </HorizontalScrollView>

</LinearLayout>

自定义GridView适配器

package com.example.psq;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

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;

public class MyGridAdapter extends BaseAdapter{

	LayoutInflater inflater = null;

	ArrayList<AppInfo> listInfo;

	public MyGridAdapter(Context context,ArrayList<AppInfo> listInfo){

		//inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

		inflater = LayoutInflater.from(context);

		//this.inflater = inflater;

		this.listInfo = listInfo;

	}

	@Override

	public int getCount() {

		// TODO Auto-generated method stub

		return listInfo.size();

	}

	@Override

	public Object getItem(int index) {

		// TODO Auto-generated method stub

		return listInfo.get(index);

	}

	@Override

	public long getItemId(int index) {

		// TODO Auto-generated method stub

		return index;

	}

	@Override

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

		// TODO Auto-generated method stub

		ViewHolder holder;

		if(convertView == null || convertView.getTag() == null){

			convertView = inflater.inflate(R.layout.grid_item,null);

			holder = new ViewHolder();

			holder.imageView = (ImageView)convertView.findViewById(R.id.imageView1);

			holder.textView = (TextView)convertView.findViewById(R.id.textView1);

			convertView.setTag(holder);

		}else{

			holder = (ViewHolder)convertView.getTag();

		}

		AppInfo appInfo = listInfo.get(position);

		holder.imageView.setImageResource(appInfo.rid);

		holder.textView.setText(appInfo.title);

		return convertView;

	}

	public class ViewHolder{

		ImageView imageView;

		TextView textView;

	}

}

主界面Activity

package com.example.psq;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import com.example.psq.R;

import android.support.v7.app.ActionBarActivity;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.PixelFormat;

import android.os.Bundle;

import android.util.DisplayMetrics;

import android.util.Log;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.view.WindowManager;

import android.view.WindowManager.LayoutParams;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.ListView;

import android.widget.TextView;

public class MainActivity extends Activity{

	GridView gridView;

	LayoutInflater inflater;

	ArrayList<AppInfo> listInfo;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        gridView = (GridView)findViewById(R.id.gridView1);

        inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        //inflater = LayoutInflater.from(this);

        listInfo = new ArrayList<AppInfo>();

        for(int i=0;i<15;i++){

	        AppInfo appInfo = new AppInfo();

	        appInfo.rid = R.drawable.icon001;

	        appInfo.title = "001";

	        listInfo.add(appInfo);

        }

        int size = listInfo.size();

        int length = 100;

        DisplayMetrics dm = new DisplayMetrics();

        this.getWindowManager().getDefaultDisplay().getMetrics(dm);

        float density = dm.density;

        int gridviewWidth = (int) (size * (length + 4) * density);

        int itemWidth = (int) (length * density);

        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

                gridviewWidth, LinearLayout.LayoutParams.FILL_PARENT);

        gridView.setLayoutParams(params); // 设置GirdView布局参数,横向布局的关键

        gridView.setColumnWidth(itemWidth); // 设置列表项宽

        gridView.setHorizontalSpacing(5); // 设置列表项水平间距

        gridView.setStretchMode(GridView.NO_STRETCH);

        gridView.setNumColumns(size); // 设置列数量=列表集合数

        //gridView.setAdapter(new MyAdapter());

        gridView.setAdapter(new MyGridAdapter(this,listInfo));

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}

AppInfo类

public class AppInfo {

	public int rid;

	public String title;

}

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