遍历指定目录下的图片文件 显示在gridview
gridview布局
package com.su.testgrid3;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemLongClickListener;import android.widget.GridView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class TestGrid3Activity extends Activity {private GridView gridView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);String[] titles = FileUtil.getImageNames("/mnt/sdcard/k/");String[] imagePaths = new String[titles.length];for (int i = 0; i < titles.length; i++) {imagePaths[i]="/mnt/sdcard/k/"+titles[i];}gridView = (GridView) findViewById(R.id.gridview);PictureAdapter adapter = new PictureAdapter(titles, imagePaths, this);gridView.setAdapter(adapter);gridView.setOnItemClickListener(new OnItemClickListener() {public void onItemClick(AdapterView<?> parent, View v,int position, long id) {Toast.makeText(TestGrid3Activity.this, "你点击了" + (position + 1),Toast.LENGTH_SHORT).show();}});gridView.setOnItemLongClickListener(new OnItemLongClickListener(){public boolean onItemLongClick(AdapterView<?> parent, View v,int position, long id) {Toast.makeText(TestGrid3Activity.this, "你长按了" + (position + 1),Toast.LENGTH_SHORT).show();return true;/* * 这里需要true * 因为:OnItemLongClick事件中：down事件返回值标记此次事 * 件是否为点击事件（返回false，是点击事件；返回true，不记为点击事件）， * 而up事件标记此次事件结束时间，也就是判断是否为长按。 */}});}}</pre>适配器<p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><pre style="font-size:12px; line-height:18px">// 2012-4-18下午07:46:57package com.su.testgrid3;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.graphics.BitmapFactory;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;//自定义适配器class PictureAdapter extends BaseAdapter {private LayoutInflater inflater;private List<Picture> pictures;public PictureAdapter(String[] titles, String[] images, Context context) {super();pictures = new ArrayList<Picture>();inflater = LayoutInflater.from(context);for (int i = 0; i < images.length; i++) {Picture picture = new Picture(titles[i], images[i]);pictures.add(picture);}}@Overridepublic int getCount() {if (null != pictures) {return pictures.size();} else {return 0;}}@Overridepublic Object getItem(int position) {return pictures.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder viewHolder;if (convertView == null) {convertView = inflater.inflate(R.layout.picture_item, null);viewHolder = new ViewHolder();viewHolder.title = (TextView) convertView.findViewById(R.id.title);viewHolder.image = (ImageView) convertView.findViewById(R.id.image);convertView.setTag(viewHolder);} else {viewHolder = (ViewHolder) convertView.getTag();}viewHolder.title.setText(pictures.get(position).getTitle());viewHolder.image.setImageBitmap(BitmapFactory.decodeFile(pictures.get(position).getImageId()));return convertView;}}class ViewHolder {public TextView title;public ImageView image;}</pre><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px">picture的javabean</p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"> </p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><pre style="font-size:12px; line-height:18px">// 2012-4-18下午07:47:44package com.su.testgrid3;class Picture {private String title;private String imageId;public Picture() {super();}public Picture(String title, String imageId) {super();this.title = title;this.imageId = imageId;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getImageId() {return imageId;}public void setImageId(String imageId) {this.imageId = imageId;}}</pre><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px">获取图片文件的名字数组的操作类</p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><pre style="font-size:12px; line-height:18px">// 2012-4-18下午07:49:44 package com.su.testgrid3;import java.io.File;public class FileUtil {public static String[] getImageNames(String folderPath) {File file01 = new File(folderPath);String[] files01 = file01.list();int imageFileNums = 0;for (int i = 0; i < files01.length; i++) {File file02 = new File(folderPath + "/" + files01[i]);if (!file02.isDirectory()) {if (isImageFile(file02.getName())) {imageFileNums++;}}}String[] files02 = new String[imageFileNums];int j = 0;for (int i = 0; i < files01.length; i++) {File file02 = new File(folderPath + "/" + files01[i]);if (!file02.isDirectory()) {if (isImageFile(file02.getName())) {files02[j] = file02.getName();j++;}}}return files02;}private static boolean isImageFile(String fileName) {String fileEnd = fileName.substring(fileName.lastIndexOf(".") + 1,fileName.length());if (fileEnd.equalsIgnoreCase("jpg")) {return true;} else if (fileEnd.equalsIgnoreCase("png")) {return true;} else if (fileEnd.equalsIgnoreCase("bmp")) {return true;} else {return false;}}}</pre><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"></p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"> </p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"> </p><p style="margin-top:5px; margin-bottom:5px; font-family:'sans serif',tahoma,verdana,helvetica; font-size:12px; line-height:18px"> <img src="//img.reader8.net/uploadfile/jiaocheng/2014017/1424/2014011402240918895.jpg" alt="遍历指定索引下的图片文件 显示在gridview"></p> </p><div class="aged2"><script type="text/javascript">a("article_content_down");</script></div> </div> <div id="pagebox" > <a href="/jiaocheng/yidongkfa/" target="_blank">查看更多</a> <A href="/jiaocheng/20120703/1390596.html" title="JNI学习小结">下一篇</A></div> <div id="MainLeftll"> <div id="MainLeftllToolbar">本文网址：<a href="https://www.reader8.net/jiaocheng/20120624/1390597.html">https://www.reader8.net/jiaocheng/20120624/1390597.html</a></div> <div class="related"><span class="relatedIco1">读书人精选</span> <ul class="relatedList"> </ul> </div> <div class="aged3"><script type="text/javascript">a("article_content_down2");</script></div> <div class="aged3a"><script type="text/javascript">a("article_content_down3");</script></div> </div> </div> <!-- 文章正文左边结束 --> <!-- 文章正文右边开始 --> <div class="leftbox_r"> <div class="aged4"><script type="text/javascript">a("article_right_up");</script></div> <div class="Rtitle"> <span class="Rtitle_text">热点排行</span></div> <div class="RContl"> <ul> <li><a href="/jiaocheng/20120928/1386340.html" target="_blank">取得当前经纬度</a></li> <li><a href="/jiaocheng/20120626/1427734.html" target="_blank">NSPredicate及正则表达式的施用心得 分享</a></li> <li><a href="/jiaocheng/20120718/1398887.html" target="_blank">RadioGroup&RadioButton小技能</a></li> <li><a href="/jiaocheng/20120703/1410421.html" target="_blank">怎么编写高效的手持设备程序代码</a></li> <li><a href="/jiaocheng/20121123/1383757.html" target="_blank">UIview急需知道的一些事情：setNeedsDis</a></li> <li><a href="/jiaocheng/20120901/1408198.html" target="_blank">IntentFilter 引见</a></li> <li><a href="/jiaocheng/20120715/1389287.html" target="_blank">wifi详解（4）</a></li> <li><a href="/jiaocheng/20121228/1422077.html" target="_blank">ListView分门别类显示</a></li> <li><a href="/jiaocheng/20130405/1424168.html" target="_blank">s3c6410上的samba移栽</a></li> <li><a href="/jiaocheng/20121224/1383910.html" target="_blank">NSString-NSDate类型转换跟CustomBar的总</a></li> </ul> </div> <div class="aged7"><script type="text/javascript">a("article_right_up2");</script></div> <!-- 文章正文右边结束 --> </div> <!--主体结束--> <script type="text/javascript">a("article_down_up");</script> <script type="text/javascript">a("foot");</script> <script type="text/javascript">a("article_down_up2");</script> <!--主体结束--> <div style="display:none"> <!--百度统计代码--> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?d6151f323a57d16696165e47eee86d53"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </div> <script type="text/javascript">a("allbt");</script> </body> </html>
