Android之 GridView学习笔记

cell.xml

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<ImageView

android:id="@+id/imageView1"

android:layout_width="100dp"

android:layout_height="100dp"

android:src="@drawable/psb20" />

</LinearLayout>

activity_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<GridView

android:id="@+id/gridView1"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:numColumns="2" >

</GridView>

</RelativeLayout>

package com.example.lesson20_gridviewdelegate1;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.widget.GridView;

import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

private int Ids[] = {R.drawable.psb20,R.drawable.psb11,R.drawable.psb14,R.drawable.psb27,R.drawable.psb31,R.drawable.psb32,R.drawable.psb33,R.drawable.psb36};

private GridView gView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

List<Map<String, Object>> cellList = new ArrayList<Map<String,Object>>();

for (int i = 0; i < Ids.length; i++) {

Map<String, Object> cellMap = new HashMap<String, Object>();

cellMap.put("imagelog", Ids[i]);

cellList.add(cellMap);

}

SimpleAdapter simpleAdapter = new SimpleAdapter(this, cellList, R.layout.cell, new String[]{"imagelog"}, new int[]{R.id.imageView1});

gView.setAdapter(simpleAdapter);

}

@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;

}

}