import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.media.ThumbnailUtils; /** * 缩略图生成工具类 * @author * */ public class ThumbnailGenerateUtils { private ThumbnailGenerateUtils(){}; /** * 根据指定的图像路径和大小来获取缩略图 * 此方法有两点好处: * 1. 使用较小的内存空间,第一次获取的bitmap实际上为null,只是为了读取宽度和高度, * 第二次读取的bitmap是根据比例压缩过的图像,第三次读取的bitmap是所要的缩略图。 * 2. 缩略图对于原图像来讲没有拉伸,这里使用了2.2版本的新工具ThumbnailUtils,使 * 用这个工具生成的图像不会被拉伸。 * @param imagePath 图像的路径 * @param width 指定输出图像的宽度 * @param height 指定输出图像的高度 * @return 生成的缩略图 */ public static Bitmap getImageThumbnail(String imagePath, int width, int height) { Bitmap bitmap = null; BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; // 获取这个图片的宽和高,注意此处的bitmap为null bitmap = BitmapFactory.decodeFile(imagePath, options); options.inJustDecodeBounds = false; // 设为 false // 计算缩放比 int h = options.outHeight; int w = options.outWidth; int beWidth = w / width; int beHeight = h / height; int be = 1; if (beWidth < beHeight) { be = beWidth; } else { be = beHeight; } if (be <= 0) { be = 1; } options.inSampleSize = be; // 重新读入图片,读取缩放后的bitmap,注意这次要把options.inJustDecodeBounds 设为 false bitmap = BitmapFactory.decodeFile(imagePath, options); // 利用ThumbnailUtils来创建缩略图,这里要指定要缩放哪个Bitmap对象 bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); return bitmap; } /** * 获取视频的缩略图 * 先通过ThumbnailUtils来创建一个视频的缩略图,然后再利用ThumbnailUtils来生成指定大小的缩略图。 * 如果想要的缩略图的宽和高都小于MICRO_KIND,则类型要使用MICRO_KIND作为kind的值,这样会节省内存。 * @param videoPath 视频的路径 * @param width 指定输出视频缩略图的宽度 * @param height 指定输出视频缩略图的高度度 * @param kind 参照MediaStore.Images.Thumbnails类中的常量MINI_KIND和MICRO_KIND。 * 其中,MINI_KIND: 512 x 384,MICRO_KIND: 96 x 96 * @return 指定大小的视频缩略图 */ public static Bitmap getVideoThumbnail(String videoPath, int width, int height,int kind) { Bitmap bitmap = null; // 获取视频的缩略图 bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind); System.out.println("w"+bitmap.getWidth()); System.out.println("h"+bitmap.getHeight()); bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); return bitmap; } }
/** * 密度计算工具 * * @author zbzhangc * */ public class DensityUtils { public static int dip2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } public static int px2dip(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f); } }
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.os.Environment;
/**
* 文件名称操作工具类
* @author zhang
*
*/
public class FileNameOperationUtils {
private static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy.MM.dd");
private FileNameOperationUtils(){};
/**
* 生成文件夹
* @return 文件夹路径
*/
public static String generateFolderName(String projectName){
String folderPath = Environment.getExternalStorageDirectory()+"/Province"+"/"+projectName
+"/"+dateFormat.format(new Date(System.currentTimeMillis()));
File folder = new File(folderPath);
if(!folder.exists())//创建文件夹
folder.mkdirs();
return folderPath;
}
/**
* 获取图片文件名称
* @return
*/
public static String getPictrueFileName(){
return System.currentTimeMillis()/1000+".jpg";
}
/**
* 获取视频文件名称
* @return
*/
public static String getVideoFileName(){
return System.currentTimeMillis()/1000+".mp4";
}
/**
* 获取音频文件名称
* @return
*/
public static String getAudioFileName(){
return System.currentTimeMillis()/1000+".3gp";
}
/**
* 获取图片文件的全路径名称
* @return
*/
public static String getPictureAbsoluteFileName(String projectName){
return generateFolderName(projectName)+"/"+getPictrueFileName();
}
/***
* 获取音频文件的全路径名称
* @param projectName
* @return
*/
public static String getAudioAbsoluteFileName(String projectName){
return generateFolderName(projectName)+"/"+getAudioFileName();
}
/**
* 替换文件夹名称
* @param fileName
* @param newFolderName
* @return
*/
public static boolean renameFolder(String fileName,String newFolderName){
File file = new File(fileName);
if(!file.isDirectory()){
String folderPath = file.getPath().substring(0,file.getPath().lastIndexOf("\\"));//当前文件夹名称
String oldFolderName = folderPath.substring(folderPath.lastIndexOf("\\")+1);//要替换文件夹名称
return new File(folderPath).renameTo(new File(folderPath.replace(oldFolderName, newFolderName)));
}else{
System.out.println(file.getPath());
String oldFolderName = file.getPath().substring(file.getPath().lastIndexOf("\\")+1);
System.out.println(oldFolderName);
return file.renameTo(new File(file.getPath().replace(oldFolderName, newFolderName)));
}
}
}
package com.iss.starwish.util; import android.content.Context; import android.widget.Toast; /** * 防止按钮连续点击 * @author zhang * */ public class Utils { private static long lastClickTime; /** * 防止用户在800ms里面的连续点击 **/ public static boolean isFastDoubleClick() { long time = System.currentTimeMillis(); long timeD = time - lastClickTime; if (0 < timeD && timeD < 800) { return true; } lastClickTime = time; return false; } /** * 显示Toast * @param context * @param content */ public static void show(Context context,String content){ Toast.makeText(context, content, Toast.LENGTH_SHORT).show(); } /** * 显示Toast * @param context * @param content */ public static void show(Context context,int strId){ Toast.makeText(context, strId, Toast.LENGTH_SHORT).show(); } }
package net.tianyouwang.utils; import net.sourceforge.pinyin4j.PinyinHelper; import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType; import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat; import net.sourceforge.pinyin4j.format.HanyuPinyinToneType; import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType; import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination; public class ChineseToPinyinUtil { private ChineseToPinyinUtil() { } /*** * 汉子转换成拼音 * @param src * @return */ public static String getPingYin(String src) { char[] t1 = null; t1 = src.toCharArray(); String[] t2 = new String[t1.length]; HanyuPinyinOutputFormat t3 = new HanyuPinyinOutputFormat(); t3.setCaseType(HanyuPinyinCaseType.LOWERCASE); t3.setToneType(HanyuPinyinToneType.WITHOUT_TONE); t3.setVCharType(HanyuPinyinVCharType.WITH_V); String t4 = ""; int t0 = t1.length; try { for (int i = 0; i < t0; i++) { // 判断是否为汉字字符 if (java.lang.Character.toString(t1[i]).matches( "[\\u4E00-\\u9FA5]+")) { t2 = PinyinHelper.toHanyuPinyinStringArray(t1[i], t3); t4 += t2[0]; } else t4 += java.lang.Character.toString(t1[i]); } // System.out.println(t4); return t4; } catch (BadHanyuPinyinOutputFormatCombination e1) { e1.printStackTrace(); } return t4; } // 返回中文的首字母 public static String getPinYinHeadChar(String str) { String convert = ""; for (int j = 0; j < str.length(); j++) { char word = str.charAt(j); String[] pinyinArray = PinyinHelper.toHanyuPinyinStringArray(word); if (pinyinArray != null) { convert += pinyinArray[0].charAt(0); } else { convert += word; } } return convert; } }
package net.tianyouwang.utils; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.telephony.TelephonyManager; public class NetUtils { /*** * 判断当前网络是否连接 * * @param con * @return */ public static boolean isNetworkAvailable(Context context) { ConnectivityManager cm = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (cm == null) return false; NetworkInfo netinfo = cm.getActiveNetworkInfo(); if (netinfo == null) { return false; } if (netinfo.isConnected()) { return true; } return false; } /**** * 获取当前的网络类型 * @param context * @return */ public static String getNetWorkType(Context context){ ConnectivityManager cm = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (cm == null) return ""; NetworkInfo netinfo = cm.getActiveNetworkInfo(); if(netinfo != null){ int type = netinfo.getType(); if(type == 0){//手机 int subtype = netinfo.getSubtype(); if(subtype == TelephonyManager.NETWORK_TYPE_CDMA){//电信2G return "2g"; } else if(subtype == TelephonyManager.NETWORK_TYPE_EVDO_0 || subtype == TelephonyManager.NETWORK_TYPE_EVDO_A || subtype == TelephonyManager.NETWORK_TYPE_EVDO_B){//电信3G return "3g"; } else if(subtype == TelephonyManager.NETWORK_TYPE_GPRS){//联通2g return "2g"; } else if(subtype == TelephonyManager.NETWORK_TYPE_EDGE){//移动2G return "2g"; } else if(subtype == TelephonyManager.NETWORK_TYPE_HSDPA || subtype == TelephonyManager.NETWORK_TYPE_UMTS){//联通3g return "3g"; } } else if(type == 1){//wifi return "wifi"; } } return "3g"; } }
Android中常用的工具类01,布布扣,bubuko.com
原文:http://blog.csdn.net/fengbianyun/article/details/25307619