Android开发的工具类能很好的封装一些常用的操作,以后使用起来也非常方便,我把我经常使用的工具类分享给大家。
FileCache:
package com.pztuan.common.util;
import java.io.File;
import android.content.Context;
public class FileCache {
private File cacheDir;
public FileCache(Context context) {
// 判断外存SD卡挂载状态,如果挂载正常,创建SD卡缓存文件夹
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)) {
cacheDir = new File(
android.os.Environment.getExternalStorageDirectory(),
"PztCacheDir");
} else {
// SD卡挂载不正常,获取本地缓存文件夹(应用包所在目录)
cacheDir = context.getCacheDir();
}
if (!cacheDir.exists()) {
cacheDir.mkdirs();
}
}
public File getFile(String url) {
String fileName = String.valueOf(url.hashCode());
File file = new File(cacheDir, fileName);
return file;
}
public void clear() {
File[] files = cacheDir.listFiles();
for (File f : files)
f.delete();
}
public String getCacheSize() {
long size = 0;
if (cacheDir.exists()) {
File[] files = cacheDir.listFiles();
for (File f : files) {
size += f.length();
}
}
String cacheSize = String.valueOf(size / 1024 / 1024) + "M";
return cacheSize;
}
}
package com.pztuan.common.util;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.net.wifi.WifiManager;
import java.security.MessageDigest;
/**
*
* @author suncat
* @category 网络工具
*/
public class NetWorkUtil {
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
public static final int STATE_DISCONNECT = 0;
public static final int STATE_WIFI = 1;
public static final int STATE_MOBILE = 2;
public static String concatUrlParams() {
return null;
}
public static String encodeUrl() {
return null;
}
public static boolean isNetWorkConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] nis = cm.getAllNetworkInfo();
if (nis != null) {
for (NetworkInfo ni : nis) {
if (ni != null) {
if (ni.isConnected()) {
return true;
}
}
}
}
return false;
}
public static boolean isWifiConnected(Context context) {
WifiManager wifiMgr = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
boolean isWifiEnable = wifiMgr.isWifiEnabled();
return isWifiEnable;
}
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = cm.getActiveNetworkInfo();
if (networkInfo != null) {
return networkInfo.isAvailable();
}
return false;
}
private static String byteArrayToHexString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));
}
return resultSb.toString();
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
public static String md5Encode(String origin) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = new String(md.digest(resultString.getBytes()));
} catch (Exception ex) {
ex.printStackTrace();
}
return resultString;
}
public static String md5EncodeToHexString(String origin) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
} catch (Exception ex) {
ex.printStackTrace();
}
return resultString;
}
public static int getNetworkState(Context context) {
ConnectivityManager connManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
// Wifi
State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
.getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return STATE_WIFI;
}
// 3G
state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
.getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return STATE_MOBILE;
}
return STATE_DISCONNECT;
}
}
package com.pztuan.common.util;
import java.security.MessageDigest;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Environment;
import android.telephony.TelephonyManager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
@SuppressLint("DefaultLocale")
public class Tools {
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
public static String byteArrayToHexString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));
}
return resultSb.toString();
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
/**
* md5 加密
*
* @param origin
* @return
*/
public static String md5Encode(String origin) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
} catch (Exception ex) {
ex.printStackTrace();
}
return resultString;
}
/**
* 手机号码格式匹配
*
* @param mobiles
* @return
*/
public static boolean isMobileNO(String mobiles) {
Pattern p = Pattern
.compile("^((13[0-9])|(15[^4,\\D])|(18[0,1,3,5-9]))\\d{8}$");
Matcher m = p.matcher(mobiles);
System.out.println(m.matches() + "-telnum-");
return m.matches();
}
/**
* 是否含有指定字符
*
* @param expression
* @param text
* @return
*/
private static boolean matchingText(String expression, String text) {
Pattern p = Pattern.compile(expression);
Matcher m = p.matcher(text);
boolean b = m.matches();
return b;
}
/**
* 邮政编码
*
* @param zipcode
* @return
*/
public static boolean isZipcode(String zipcode) {
Pattern p = Pattern.compile("[0-9]\\d{5}");
Matcher m = p.matcher(zipcode);
System.out.println(m.matches() + "-zipcode-");
return m.matches();
}
/**
* 邮件格式
*
* @param email
* @return
*/
public static boolean isValidEmail(String email) {
Pattern p = Pattern
.compile("^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$");
Matcher m = p.matcher(email);
System.out.println(m.matches() + "-email-");
return m.matches();
}
/**
* 固话号码格式
*
* @param telfix
* @return
*/
public static boolean isTelfix(String telfix) {
Pattern p = Pattern.compile("d{3}-d{8}|d{4}-d{7}");
Matcher m = p.matcher(telfix);
System.out.println(m.matches() + "-telfix-");
return m.matches();
}
/**
* 用户名匹配
*
* @param name
* @return
*/
public static boolean isCorrectUserName(String name) {
Pattern p = Pattern.compile("([A-Za-z0-9]){2,10}");
Matcher m = p.matcher(name);
System.out.println(m.matches() + "-name-");
return m.matches();
}
/**
* 密码匹配,以字母开头,长度 在6-18之间,只能包含字符、数字和下划线。
*
* @param pwd
* @return
*
*/
public static boolean isCorrectUserPwd(String pwd) {
Pattern p = Pattern.compile("\\w{6,18}");
Matcher m = p.matcher(pwd);
System.out.println(m.matches() + "-pwd-");
return m.matches();
}
/**
* 检查是否存在SDCard
*
* @return
*/
public static boolean hasSdcard() {
String state = Environment.getExternalStorageState();
if (state.equals(Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}
/**
* 计算剩余日期
*
* @param remainTime
* @return
*/
public static String calculationRemainTime(String endTime, long countDown) {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
Date now = new Date(System.currentTimeMillis());// 获取当前时间
Date endData = df.parse(endTime);
long l = endData.getTime() - countDown - now.getTime();
long day = l / (24 * 60 * 60 * 1000);
long hour = (l / (60 * 60 * 1000) - day * 24);
long min = ((l / (60 * 1000)) - day * 24 * 60 - hour * 60);
long s = (l / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
return "剩余" + day + "天" + hour + "小时" + min + "分" + s + "秒";
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}
public static void showLongToast(Context act, String pMsg) {
Toast toast = Toast.makeText(act, pMsg, Toast.LENGTH_LONG);
toast.show();
}
public static void showShortToast(Context act, String pMsg) {
Toast toast = Toast.makeText(act, pMsg, Toast.LENGTH_SHORT);
toast.show();
}
/**
* 获取手机Imei号
*
* @param context
* @return
*/
public static String getImeiCode(Context context) {
TelephonyManager tm = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return tm.getDeviceId();
}
/**
* @author sunglasses
* @param listView
* @category 计算listview的高度
*/
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
}
SharedPreferencesUtil:
package com.pztuan.db;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import java.util.ArrayList;
import java.util.Set;
public class SharedPreferencesUtil {
private static final String TAG = "PZTuan.SharePreferencesUtil";
private static final String SHAREDPREFERENCE_NAME = "sharedpreferences_pztuan";
private static SharedPreferencesUtil mInstance;
private static SharedPreferences mSharedPreferences;
private static SharedPreferences.Editor mEditor;
public synchronized static SharedPreferencesUtil getInstance(Context context) {
if (mInstance == null) {
mInstance = new SharedPreferencesUtil(context);
}
return mInstance;
}
private SharedPreferencesUtil(Context context) {
mSharedPreferences = context.getSharedPreferences(
SHAREDPREFERENCE_NAME, Context.MODE_PRIVATE);
mEditor = mSharedPreferences.edit();
}
public synchronized boolean putString(String key, String value) {
mEditor.putString(key, value);
return mEditor.commit();
}
public synchronized boolean putStringArrayList(String key,
ArrayList value) {
for (int j = 0; j < value.size() - 1; j++) {
if (value.get(value.size() - 1).equals(value.get(j))) {
value.remove(j);
}
}
mEditor.putInt("citySize", value.size());
if (value.size() == 4) {
mEditor.putString(key + 0, value.get(3));
mEditor.putString(key + 1, value.get(0));
mEditor.putString(key + 2, value.get(1));
} else if (value.size() == 3) {
mEditor.putString(key + 0, value.get(2));
mEditor.putString(key + 1, value.get(0));
mEditor.putString(key + 2, value.get(1));
} else {
for (int i = 0; i < value.size(); i++) {
mEditor.putString(key + i, value.get(value.size() - 1 - i));
}
}
return mEditor.commit();
}
public synchronized boolean putInt(String key, int value) {
mEditor.putInt(key, value);
return mEditor.commit();
}
public synchronized boolean putLong(String key, long value) {
mEditor.putLong(key, value);
return mEditor.commit();
}
public synchronized boolean putFloat(String key, float value) {
mEditor.putFloat(key, value);
return mEditor.commit();
}
public synchronized boolean putBoolean(String key, boolean value) {
mEditor.putBoolean(key, value);
return mEditor.commit();
}
public synchronized boolean putStringSet(String key, Set value) {
mEditor.putStringSet(key, value);
return mEditor.commit();
}
public String getString(String key, String value) {
return mSharedPreferences.getString(key, value);
}
public ArrayList getStringArrayList(String key, int size) {
ArrayList al = new ArrayList();
int loop;
if (size > 4)
loop = 4;
else
loop = size;
for (int i = 0; i < loop; i++) {
String name = mSharedPreferences.getString(key + i, null);
al.add(name);
}
return al;
}
public int getInt(String key, int value) {
return mSharedPreferences.getInt(key, value);
}
public long getLong(String key, long value) {
return mSharedPreferences.getLong(key, value);
}
public float getFloat(String key, float value) {
return mSharedPreferences.getFloat(key, value);
}
public boolean getBoolean(String key, boolean value) {
return mSharedPreferences.getBoolean(key, value);
}
public Set getStringSet(String key, Set value) {
return mSharedPreferences.getStringSet(key, value);
}
public boolean remove(String key) {
mEditor.remove(key);
return mEditor.commit();
}
private static final String PREFERENCES_AUTO_LOGIN = "yyUserAutoLogin";
private static final String PREFERENCES_USER_NAME = "yyUserName";
private static final String PREFERENCES_USER_PASSWORD = "yyUserPassword";
public boolean isAutoLogin() {
return mSharedPreferences.getBoolean(PREFERENCES_AUTO_LOGIN, false);
}
public String getUserName() {
return mSharedPreferences.getString(PREFERENCES_USER_NAME, "");
}
public String getUserPwd() {
return mSharedPreferences.getString(PREFERENCES_USER_PASSWORD, "");
}
public void saveLoginInfo(Boolean autoLogin, String userName,
String userPassword) {
assert (mEditor != null);
mEditor.putBoolean(PREFERENCES_AUTO_LOGIN, autoLogin);
mEditor.putString(PREFERENCES_USER_NAME, userName);
mEditor.putString(PREFERENCES_USER_PASSWORD, userPassword);
mEditor.commit();
}
public void saveLoginPassword(String userPassword) {
mEditor.putString(PREFERENCES_USER_PASSWORD, userPassword);
mEditor.commit();
}
public void saveLoginUserid(String userid) {
mEditor.putString("userid", userid);
mEditor.commit();
}
public void clearUserInfo() {
assert (mEditor != null);
mEditor.putBoolean(PREFERENCES_AUTO_LOGIN, false);
mEditor.putString(PREFERENCES_USER_NAME, "");
mEditor.putString(PREFERENCES_USER_PASSWORD, "");
mEditor.putString("userid", "");
mEditor.commit();
}
}