GridView的使用(一):与ArrayAdapter搭配使用

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package com.example.androidtest;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.GridView;import android.widget.TextView;public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener {TextView selection;String[] items = {"lorem", "ipsum", "dolor", "sit", "amet","consectetuer", "adipiscing", "elit", "morbi","vel", "ligula", "vitae", "arcu", "aliquet", "mollis","etiam", "vel", "erat", "placerat", "ante","porttitor", "sodales", "pellentesque", "augue", "purus"};public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);selection = (TextView)findViewById(R.id.selection);GridView g = (GridView)findViewById(R.id.grid);g.setAdapter(new FunnyLookingAdapter(this, android.R.layout.simple_list_item_1, items));g.setOnItemSelectedListener(this);}public void onItemSelected(AdapterView<?> parent, View v, int position, long id){selection.setText(items[position]);}public void onNothingSelected(AdapterView<?> parent){selection.setText("");}private class FunnyLookingAdapter extends ArrayAdapter {Context ctxt;FunnyLookingAdapter(Context ctxt, int resource, String[] items){super(ctxt, resource, items);this.ctxt = ctxt;}public View getView(int position, View convertView, ViewGroup parent){TextView label = (TextView)convertView;if (convertView == null) {convertView = new TextView(ctxt);label = (TextView)convertView;}label.setText(items[position]);return convertView;}}}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  >  <TextView    android:id="@+id/selection"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    />  <GridView    android:id="@+id/grid"    android:layout_width="fill_parent"     android:layout_height="fill_parent"    android:verticalSpacing="35px"    android:horizontalSpacing="5px"    android:numColumns="auto_fit"    android:columnWidth="100px"    android:stretchMode="columnWidth"    android:gravity="center"    /></LinearLayout>

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