Android 常用方法代碼集合

jopen 11年前發布 | 21K 次閱讀 Android Android開發移動開發
 private static Contextcontext;
privatestatic Displaydisplay;
private static String TAG = "MyTools";
public MyTools(Context context) {
MyTools.context = context;
}
public static int getScreenHeight() // 獲取屏幕高度
{
if (context ==null) {
Log.e("hck",TAG +"  getScreenHeight: " +"context 不能為空");
return 0;
}
display = ((Activity)context).getWindowManager().getDefaultDisplay();
return display.getHeight();
}
public static int getScreenWidth() // 獲取屏幕寬度
{
if (context ==null) {
Log.e("hck",TAG +"  getScreenHeight: " +"context 不能為空");
return 0;
}
display = ((Activity)context).getWindowManager().getDefaultDisplay();
return display.getWidth();
}
public static String getSDK() {
return android.os.Build.VERSION.SDK;// SDK號
}
public static String getModel() // 手機型號
{
return android.os.Build.MODEL;
}
public static String getRelease() // android系統版本號
{
return android.os.Build.VERSION.RELEASE;
}
public static String getImei(Context context) // 獲取手機身份證imei
{
TelephonyManager telephonyManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return telephonyManager.getDeviceId();
}
public static String getVerName(Context context) { // 獲取版本名字
try {
String pkName = context.getPackageName();
String versionName = context.getPackageManager().getPackageInfo(
pkName, 0).versionName;
return versionName;
} catch (Exception e) {
}
returnnull;
}
public static int getVerCode(Context context) {// 獲取版本號
String pkName = context.getPackageName();
try {
int versionCode = context.getPackageManager().getPackageInfo(
pkName, 0).versionCode;
return versionCode;
} catch (NameNotFoundException e) {
e.printStackTrace();
}
return 0;
}
public static boolean isNetworkAvailable(Context context) {// 判斷網絡連接是否可用
// 獲取手機所有連接管理對象（包括對wi-fi,net等連接的管理）
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity ==null)
returnfalse;
// 獲取網絡連接管理的對象
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (info ==null || !info.isConnected())
returnfalse;
// 判斷當前網絡是否已經連接
return (info.getState() == NetworkInfo.State.CONNECTED);
}
public static String trim(String str, int limit) {// 字符串超出給定文字則截取
String mStr = str.trim();
return mStr.length() > limit ? mStr.substring(0, limit) : mStr;
}
public static String getTel(Context context) { // 獲取手機號碼，很多手機獲取不到
TelephonyManager telManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return telManager.getLine1Number();
}
public static String getMac(Context context) { // 獲取時機mac地址
final WifiManager wifi = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
if (wifi !=null) {
WifiInfo info = wifi.getConnectionInfo();
if (info.getMacAddress() !=null) {
return info.getMacAddress().toLowerCase(Locale.ENGLISH)
.replace(":","");
}
return"";
}
return"";
}
/**

將 像素 轉換成 dp


@param pxValue

像素

@returndp


*/
public static int px2dip(int pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**

將 畫素 轉換成 sp


@param pixel

@returnsp


*/
publicstaticint px2sp(int px) {
float scaledDensity =context.getResources().getDisplayMetrics().scaledDensity;
return (int) (px / scaledDensity);
}
/**

將 dip 轉換成畫素 px


@param dipValue

dip 像素的值

@return 畫素px


*/
public static int dip2px(float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
public static int[][] getViewsPosition(List<View> views) {
int[][] location =newint[views.size()][2];
for (int index = 0; index < views.size(); index++) {
views.get(index).getLocationOnScreen(location[index]);
}
return location;
}
/**

傳入一個view,返回一個int數組來存放 view在手機屏幕上左上角的絕對坐標


@param views

傳入的view

@return 返回int型數組,location[0]表示x,location[1]表示y


*/
public static int[] getViewPosition(View view) {
int[] location =newint[2];
view.getLocationOnScreen(location);
return location;
}
/**

onTouch界面時指尖在views中的哪個view當中


@param event

ontouch事件

@param views

view list

@return view


*/
public static View getOnTouchedView(MotionEvent event, List<View> views) {
int[][] location = getViewsPosition(views);
for (int index = 0; index < views.size(); index++) {
if (event.getRawX() > location[index][0]
&& event.getRawX() < location[index][0]

views.get(index).getWidth()

&& event.getRawY() > location[index][1]
&& event.getRawY() < location[index][1]

views.get(index).getHeight()) {

return views.get(index);
}
}
returnnull;
}
/**

將傳進的圖片存儲在手機上,并返回存儲路徑


@param photo

Bitmap 類型,傳進的圖片

@return String 返回存儲路徑


*/
public static String savePic(Bitmap photo, String name, String path) {
ByteArrayOutputStream baos = new ByteArrayOutputStream(); // 創建一個
// outputstream
// 來讀取文件流
photo.compress(Bitmap.CompressFormat.PNG, 100, baos);// 把 bitmap 的圖片轉換成
// jpge
// 的格式放入輸出流中
byte[] byteArray = baos.toByteArray();
String saveDir = Environment.getExternalStorageDirectory()
.getAbsolutePath();
File dir = new File(saveDir +"/" + path);// 定義一個路徑
if (!dir.exists()) {// 如果路徑不存在,創建路徑
dir.mkdir();
}
File file = new File(saveDir, name +".png");// 定義一個文件
if (file.exists())
file.delete(); // 刪除原來有此名字文件,刪除
try {
file.createNewFile();
FileOutputStream fos;
fos = new FileOutputStream(file);// 通過 FileOutputStream 關聯文件
BufferedOutputStream bos = new BufferedOutputStream(fos); // 通過 bos
// 往文件里寫東西
bos.write(byteArray);
bos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return file.getPath();
}
/**

回收 bitmap 減小系統占用的資源消耗

*/
public static void destoryBimap(Bitmap photo) {
if (photo !=null && !photo.isRecycled()) {
photo.recycle();
photo = null;
}
}
/**

將輸入字串做 md5 編碼


@param s

: 欲編碼的字串

@return 編碼後的字串, 如失敗, 返回 ""


*/
public static String md5(String s) {
try {
// Create MD5 Hash
MessageDigest digest = java.security.MessageDigest
.getInstance("MD5");
digest.update(s.getBytes("UTF-8"));
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
for (byte b : messageDigest) {
if ((b & 0xFF) < 0x10)
hexString.append("0");
hexString.append(Integer.toHexString(b & 0xFF));
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
return"";
} catch (UnsupportedEncodingException e) {
return"";
}
}
publicstaticboolean isNumber(char c) {// 是否是數字
boolean isNumer =false;
if (c >= '0' && c <= '9') {
isNumer = true;
}
return isNumer;
}
public static boolean isEmail(String strEmail) {// 是否是正確的郵箱地址
String checkemail ="^([a-z0-9A-Z]+[-|\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\.)+[a-zA-Z]{2,}$";
Pattern pattern = Pattern.compile(checkemail);
Matcher matcher = pattern.matcher(strEmail);
return matcher.matches();
}
public static boolean isNull(String string) // 字符串是否為空
{
if (null == string ||"".equals(string)) {
returnfalse;
}
returntrue;
}
public static boolean isLenghtOk(String string,int max,int min)// 字符串長度檢測
{
if (null != string) {
if (string.length() > max || string.length() < min) {
returnfalse;
}
}
returntrue;
}
public static boolean isLenghtOk(String string,int max)// 字符串長度是否
{
if (null != string) {
if (string.length() > max) {
returnfalse;
}
}
returntrue;
}
//用一種外部格式的字體，字體文件放在assets下面的fonts下面，名字叫whsn.ttf
獲取字體樣式：Typeface tencentTypeface=Typeface.createFromAsset(this.getAssets(), "fonts/whsn.ttf")
使用
textView.setTypeface(tencentTypeface);
/**
*activity管理類,保證應用退出后，銷毀所有創建的activity
**/
/**

應用程序Activity管理類：用于Activity管理和應用程序退出

@author liux (http://my.oschina.net/liux)

@version 1.0

@created 2012-3-21
*/


public class AppManager {
private static Stack<Activity> activityStack;
private static AppManager instance;
private AppManager(){}
/**

單一實例

*/
public static AppManager getAppManager(){
if(instance==null){
instance=new AppManager();
}
returninstance;
}
/**

添加Activity到堆棧

*/
public void addActivity(Activity activity){
if(activityStack==null){
activityStack=new Stack<Activity>();
}
activityStack.add(activity);
}
/**

獲取當前Activity（堆棧中最后一個壓入的）

*/
public Activity currentActivity(){
Activity activity=activityStack.lastElement();
return activity;
}
/**

結束當前Activity（堆棧中最后一個壓入的）

*/
public void finishActivity(){
Activity activity=activityStack.lastElement();
finishActivity(activity);
}
/**

結束指定的Activity

*/
public void finishActivity(Activity activity){
if(activity!=null){
activityStack.remove(activity);
activity.finish();
activity=null;
}
}
/**

結束指定類名的Activity

*/
public void finishActivity(Class<?> cls){
for (Activity activity :activityStack) {
if(activity.getClass().equals(cls) ){
finishActivity(activity);
}
}
}
/**

結束所有Activity

*/
public void finishAllActivity(){
for (int i = 0, size =activityStack.size(); i < size; i++){

        if (null !=activityStack.get(i)){

        activityStack.get(i).finish();

        }

}


activityStack.clear();
}
/**

退出應用程序

*/
public void AppExit(Context context) {
try {
finishAllActivity();
ActivityManager activityMgr= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
activityMgr.restartPackage(context.getPackageName());
System.exit(0);
} catch (Exception e) {}
}
}
//字符串相關工具類
private final static ThreadLocal<SimpleDateFormat> dateFormater = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
};
private final static ThreadLocal<SimpleDateFormat> dateFormater2 = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd");
}
};
/**

將字符串轉位日期類型

@param sdate

@return


*/
public static Date toDate(String sdate) {
try {
return dateFormater.get().parse(sdate);
} catch (ParseException e) {
return null;
}
}
/**

以友好的方式顯示時間

@param sdate

@return


*/
public static String friendly_time(String sdate) {
Date time = toDate(sdate);
if(time == null) {
return "Unknown";
}
String ftime = "";
Calendar cal = Calendar.getInstance();
//判斷是否是同一天
String curDate = dateFormater2.get().format(cal.getTime());
String paramDate = dateFormater2.get().format(time);
if(curDate.equals(paramDate)){
int hour = (int)((cal.getTimeInMillis() - time.getTime())/3600000);
if(hour == 0)
ftime = Math.max((cal.getTimeInMillis() - time.getTime()) / 60000,1)+"分鐘前";
else
ftime = hour+"小時前";
return ftime;
}
long lt = time.getTime()/86400000;
long ct = cal.getTimeInMillis()/86400000;
int days = (int)(ct - lt);
if(days == 0){
int hour = (int)((cal.getTimeInMillis() - time.getTime())/3600000);
if(hour == 0)
ftime = Math.max((cal.getTimeInMillis() - time.getTime()) / 60000,1)+"分鐘前";
else
ftime = hour+"小時前";
}
else if(days == 1){
ftime = "昨天";
}
else if(days == 2){
ftime = "前天";
}
else if(days > 2 && days <= 10){
ftime = days+"天前";
}
else if(days > 10){
ftime = dateFormater2.get().format(time);
}
return ftime;
}
/**

判斷給定字符串時間是否為今日

@param sdate

@return boolean


*/
public static boolean isToday(String sdate){
boolean b = false;
Date time = toDate(sdate);
Date today = new Date();
if(time != null){
String nowDate = dateFormater2.get().format(today);
String timeDate = dateFormater2.get().format(time);
if(nowDate.equals(timeDate)){
b = true;
}
}
return b;
}
/**

判斷給定字符串是否空白串。

空白串是指由空格、制表符、回車符、換行符組成的字符串

若輸入字符串為null或空字符串，返回true

@param input

@return boolean


*/
public static boolean isEmpty( String input )
{
if ( input == null || "".equals( input ) )
return true;
for ( int i = 0; i < input.length(); i++ )
{
char c = input.charAt( i );
if ( c != ' ' && c != '\t' && c != '\r' && c != '\n' )
{
return false;
}
}
return true;
}
/**

判斷是不是一個合法的電子郵件地址

@param email

@return


*/
public static boolean isEmail(String email){
if(email == null || email.trim().length()==0)
return false;

return emailer.matcher(email).matches();


}
/**

字符串轉整數

@param str

@param defValue

@return


*/
public static int toInt(String str, int defValue) {
try{
return Integer.parseInt(str);
}catch(Exception e){}
return defValue;
}
/**

對象轉整數

@param obj

@return 轉換異常返回 0


*/
public static int toInt(Object obj) {
if(obj==null) return 0;
return toInt(obj.toString(),0);
}
/**

對象轉整數

@param obj

@return 轉換異常返回 0


*/
public static long toLong(String obj) {
try{
return Long.parseLong(obj);
}catch(Exception e){}
return 0;
}
/**

字符串轉布爾值

@param b

@return 轉換異常返回 false


*/
public static boolean toBool(String b) {
try{
return Boolean.parseBoolean(b);
}catch(Exception e){}
return false;
}
/**

獲取當前網絡類型

@return 0：沒有網絡   1：WIFI網絡   2：WAP網絡    3：NET網絡


*/
public int getNetworkType() {
int netType = 0;
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo == null) {
return netType;
}
int nType = networkInfo.getType();
if (nType == ConnectivityManager.TYPE_MOBILE) {
String extraInfo = networkInfo.getExtraInfo();
if(!StringUtils.isEmpty(extraInfo)){
if (extraInfo.toLowerCase().equals("cmnet")) {
netType = NETTYPE_CMNET;
} else {
netType = NETTYPE_CMWAP;
}
}
} else if (nType == ConnectivityManager.TYPE_WIFI) {
netType = NETTYPE_WIFI;
}
return netType;
}</pre>
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Android Android開發移動開發
Android 常用方法代碼集合

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