Android开发10个常用工具类

Android开发10个常用工具类L日志工具类Ljavapackagecom.zhy.utils;importandroid.util.Log;***Log统一管理类*/publicclassLprivateL()/*cannotbeinstantiated*/thrownewUnsupportedOperationException("cannotbeinstantiated");*保存在手机里面的文件名publicstaticfinalStringFILE_NAME="share_data";/***保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法*@paramcontext@paramkey@paramobject*/publicstaticvoidput(Contextcontext.Stringkey.Objectobject){SharedPreferencessp=context.getSharedPreferences(FILE_NAMEJContext.MODE_PRIVATE);SharedPreferences.Editoreditor=sp.edit();if(objectinstanceofString)editor.putString(key,,(String)object);}elseif(objectinstanceofInteger)editor.putInt(key(Integer)object);}elseif(objectinstanceofBoolean)editor.putBoolean(keyJ(Boolean)object);}elseif(objectinstanceofFloat)editor.putFloat(key(Float)object);}elseif(objectinstanceofLong)editor.putLong(key(Long)object);}elseeditor.putString(key,object.toString());)SharedPreferencesCompat.apply(editor);*得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值*@paramcontext*@paramkey*@paramdefaultobject*@returnpublicstaticObjectget(ContextcontextStringkey.Objectdefaultobject)SharedPreferencessp=context.getSharedPreferences(FILE_NAME^Context.MODE_PRIVATE);if(defaultobjectinstanceofString)returnsp.getString(key^(String)defaultobject);}elseif(defaultobjectinstanceofInteger)returnsp.get工nt(key,(Integer)defaultobject);}elseif(defaultobjectinstanceofBoolean)returnsp.getBoolean(key(Boolean)defaultobject);}elseif(defaultobjectinstanceofFloat){returnsp.getFloat(key,(Float)defaultobject);}elseif(defaultobjectinstanceofLong){returnsp.getLong(key,(Long)defaultobject);)returnnull;)/***移除某个key值已经对应的值@paramcontext@paramkey*/publicstaticvoidremove(Contextcontext.Stringkey){SharedPreferencessp=context.getSharedPreferences(FILE_NAMEJContext.MODE_PRIVATE);SharedPreferences.Editoreditor=sp.edit();editor,remove(key);SharedPreferencesCompat.apply(editor);}/**查询某个key是否已经存在*@paramcontext*@paramkey*清除所有数据*@paramcontext*/publicstaticvoidclear(Contextcontext){SharedPreferencessp=context•getSharedPreferences(FILE_NAME_>Context.MODE_PRIVATE);SharedPreferences.Editoreditor=sp.edit();editor.clear();SharedPreferencesCompat.apply(editor);)*@returnpublicstaticbooleancontains(ContextcontextStringkey){SharedPreferencessp=context.getSharedPreferences(FILE_NAMEJContext.MODE_PRIVATE);returnsp.contains(key);)/***返回所有的键值对*@paramcontext@return*/publicstaticMap<String,?>getAll(Contextcontext){SharedPreferencessp=context.getSharedPreferences(FILE_NAME?Context.MODE_PRIVATE);returnsp.getAll();*创建一个解决SharedPreferencesCompat.apply方法的一个兼容类**©authorzhy**/privatestaticclassSharedPreferencesCompatprivatestaticfinalMethodsApplyMethod=findApplyMethod();***反射查找apply的方法**@return*/@SuppressWarnings({"unchecked1^"rawtypes”))privatestaticMethodfindApplyMethod()tryClassclz=SharedPreferences.Editor.class;returnclz.getMethod("apply");}catch(NoSuchMethodExceptione)returnnull;***如果找到则使用apply执行，否则使用commit*@parameditorpublicstaticvoidapply(SharedPreferences.Editoreditor)tryif(sApplyMethod!=null)sApplyMethod.invoke(editor);return;}catch(IllegalArgumentExceptione)}catch(IllegalAccessExceptione){}catch(InvocationTargetExceptione){)mit();})}对SharedPreference的使用做了建议的封装，对夕公布出put,get,remove,clear等等方法；注意一点，里面所有的commit操作使用了SharedPreferencesCompat.apply进行了替代，目的是尽可能的使用叩ply代替commit首先说下为什么，因为commit方法是同步的,并且我们很多时候的commit操作都是UI线程中，毕竟是10操作，尽可能异步；所以我们使用apply进行替代，apply异步的进行写入;但是apply相当于commit来说是newAPI呢，为了更好的兼容，我们做了适配；SharedPreferencesCompat也可以给大家创建兼容类提供了一定的参考〜〜4、单位转换类Densitylltilspackagecom.zhy.utils;importandroid.content.Context;importandroid.util.TypedValue;/***常用单位转换的辅助类****/PublicclassDensityUtilsprivateDensityUtils()publicstaticbooleanisDebug=true;//是否需要打印bug,可以在application的onCreate函数里面初始化privatestaticfinalStringTAG="way";//下面四个是默认tag的函数publicstaticvoidi(Stringmsg){if(isDebug)Log.i(TAGmsg);)publicstaticvoidd(Stringmsg){if(isDebug)Log.d(TAG,msg);}publicstaticvoide(Stringmsg)if(isDebug)**cannotbeinstantiated**thrownewUnsupportedOperationException("cannotbeinstantiated");dp转px*@paramcontext@paramval@return*/publicstaticintdp2px(Contextcontext,floatdpVal){return(int)TypedValue.叩plyDimension(TypedValue.COMPLEX_UN工T_D工P,dpVal,context.getResources().getDisplayMetrics());}/***sp转px呵b9L9山cou本ex本呵b9L9山八9丁呵在本nLu\bnp丁罩c2本9本罩c罩u本2bsbx（Cou本ex本cou本ex本、+丁o9本2b八9T）杨Le$nLu（罩u本）I入beq八9丁ne.9bb丁人D罩山eu2罩ou（l入beq八9丁ne.COWb[EX-n/II-2b.2b八9丁、cou$ex$:.8e$be2onLce2Q.8e本D罩2b丁9入We本L^c2。）?}bx转qb**呵b9L9山cou本ex本*呵设3山bxA9丁*呵Le本nLu*\bnp丁罩c2本9本罩c+丁。9本bxsqb（Cou本ex本cou本ex本、+丁。9本bx八9丁）finalfloatscale=context.getResources().getDisplayMetrics().density;return(pxVal/scale);)/***px转sp*@paramfontscale@parampxVal@return*/publicstaticfloatpx2sp(ContextcontextfloatpxVal){return(pxVal/context.getResources().getDisplayMetrics().scaledDensity);))5、SD卡相关辅助类SDCardUtilspackagecom.zhy.utils;importjava.io.File;importandroid.os.Environment;importandroid.os.StatFs;***SD卡相关的辅助类*/publicclassSDCardUtilsprivateSDCardlltils()**cannotbeinstantiated**/thrownewUnsupportedOperationException("cannotbeinstantiated");***判断SDCard是否可用*@return*/publicstaticbooleanisSDCardEnable()returnEnvironment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);***获取SD卡路径*@return*/publicstaticStringgetSDCardPath()returnEnvironment.getExternalStorageDirectory().getAbsolutePath()+File.separator;*获取SD卡的剩余容量单位byte**©return*/publicstaticlonggetSDCardAHSize(){if(isSDCardEnable()){StatFsstat=newStatFs(getSDCardPath());//获取空闲的数据块的数量longavailableBlocks=(long)stat.getAvailableBlocks()-4;//获取单个数据块的大小(byte)longfreeBlocks=stat.getAvailableBlocks();returnfreeBlocks*availableBlocks;)return0;)/***获取指定路径所在空间的剩余可用容量字节数，单位byte@paramfilePath@return容量字节SDCard可用空间，内部存储可用空间*/publicstaticlonggetFreeBytes(StringfilePath){//如果是Sd卡的下的路径，则获取sd卡可用容量if(filePath.startsWith(getSDCardPath())){filePath=getSDCardPath();}else{//如果是内部存储的路径，则获取内存存储的可用容量filePath=Environment.getDataDirectory().getAbsolutePath();}StatFsstat=newStatFs(filePath);longavailableBlocks=(long)stat.getAvailableBlocks()-4;returnstat.getBlockSize()*availableBlocks;)/***获取系统存储路径@return/publicstaticStringgetRootDirectoryPath(){returnEnvironment.getRootDirectory().getAbsolutePath();)}6、屏幕相关辅助类ScreenUtilspackagecom.zhy.utils;importandroid.app.Activity;importandroid.content.Context;importandroid.graphics.Bitmap;importandroid.graphics.Rect;importandroid.util.DisplayMetrics;importandroid.view.View;importandroid.view.WindowManager;获得屏幕相关的辅助类***/publicclassScreenUtils{privateScreenUtils(){/**cannotbeinstantiated**/thrownewUnsupportedOperationException("cannotbeinstantiated");}/***获得屏幕高度**@paramcontext*@return*/publicstaticintgetScreenWidth(Contextcontext)WindowManagerwm=(WindowManager)context.getSystemService(Context.WINDOW_SERVICE);DisplayMetricsoutMetrics=newDisplayMetrics();wm.getDefaultDisplayO.getMetrics(outMetrics);returnoutMetrics.widthPixels;)*获得屏幕宽度*@paramcontext@return/publicstaticintgetScreenHeight(Contextcontext)WindowManagerwm=(WindowManager)context.getSystemService(Context.WINDOW_SERVICE);DisplayMetricsoutMetrics=newDisplayMetrics();Log.e(TAG,msg);}publicstaticvoidv(Stringmsg){if(isDebug)Log.v(TAG,msg);}//下面是传入自定义tag的函数publicstaticvoidi(Stringtag.Stringmsg){if(isDebug)Log.i(tag,msg);)publicstaticvoidd(Stringtag.Stringmsg){if(isDebug)Log.i(tag,msg);wm.getDefaultDisplay().getMetrics(outNletrics);returnoutMetrics.heightpixels;)***获得状态栏的高度*@paramcontext*@returnpublicstaticintgetStatusHeight(Contextcontext)intstatusHeight=-1;tryClass<?>clazz=Class.forName("ernal.R$dimen");Objectobject=clazz.newlnstance();intheight=Integer.parselnt(clazz.getField("status_bar_height").get(object).toString());statusHeight=context.getResources().getDimensionPixelSize(height);}catch(Exceptione){e.printStackTrace();)returnstatusHeight;}/***获取当前屏幕截图，包含状态栏*@paramactivity@return*/publicstaticBitmapsnapShotWithStatusBar(Activityactivity){Viewview=activity,getWindow().getDecorView();view.setDrawingCacheEnabled(true);view.buildDrawingCache();Bitmapbmp=view.getDrawingCache();intwidth=getScreenWidth(activity);intheight=getScreenHeight(activity);Bitmapbp=null;bp=Bitmap.createBitmap(bmp0,0,width,height);view.destroyDrawingCache();returnbp;***获取当前屏幕截图，不包含状态栏*@paramactivity@return*/publicstaticBitmapsnapShotWithoutStatusBar(Activityactivity)Viewview=activity.getWindow().getDecorView();view.setDrawingCacheEnabled(true);view.buildDrawingCache();Bitmapbmp=view.getDrawingCache();Rectframe=newRect();activity.getWindow().getDecorView().getWindowVisibleDisplayFname(frame)intstatusBarHeight=frame.top;intwidth=getScreenWidth(activity);intheight=getScreenHeight(activity);Bitmapbp=null;bp=Bitmap.createBitmap(bmp0,statusBarHeight^width,height-statusBarHeight);view.destroyDrawingCache();returnbp;)7、App相关辅助类packagecom.zhy.utils;importandroid.content.Context;importandroid.content.pm.Packageinfo;importandroid.content.pm.PackageManager;importandroid・content・pm.PackageManager.NameNotFoundException;***跟App相关的辅助类*/publicclassAppUtilsprivateAppUtils()/"cannotbeinstantiated**/thrownewUnsupportedOperationException("cannotbeinstantiated");*获取应用程序名称*/publicstaticStringgetAppName(Contextcontext){try{PackageManagerpackageManager=context.getPackageManager();Packageinfopackageinfo=packageManager.getPackageinfo(context.getPackageName(),0);intlabelRes=packageinfo.applicationinfo.labelRes;returncontext.getResources().getString(labelRes);}catch(NameNotFoundExceptione){e.printStackTrace();)returnnull;)***［获取应用程序版本名称信息］@paramcontext@return当前应用的版本名称*/publicstaticStringgetVersionName(Contextcontext){try{PackageManagerpackageManager=context.getPackageManager();Packageinfopackageinfo=packageManager.getPackageinfo(context.getPackageName(),0);returnpackageinfo.versionName;}catch(NameNotFoundExceptione)

{e.printStackTrace();}returnnull;8、软键盘相关辅助类KeyBoardUtilspackagecom.zhy.utils;importandroid.content.Context;importandroid.view.inputmethod.InputMethodManager;importandroid.widget.EditText;/***打开或关闭软键盘**@authorzhy**/publicclassKeyBoardUtils{/***打卡软键盘@parammEditText输入框@parammContext上下文/publicstaticvoidopenKeybord(EditTextmEditText^ContextmContext){InputMethodManagerimm=(InputMethodManager)mContext.getSystemService(Context.INPUT_METHOD_SERVICE);imm.showSoftInput(mEditTextInputMethodManager.RESULT_SHOWN);imm.toggleSoftInput(InputMethodManager.SHOW_FORCEDJInputMethodManager.HIDE_IMPLICIT_ONLY);}/**关闭软键盘*@parammEditText输入框*@parammContext上下文*/publicstaticvoidcloseKeybord(EditTextmEditTextContextmContext)InputMethodManagerimm=(InputMethodManager)mContext.getSystemService(Context.INPUT_METHOD_SERVICE);imm.hideSoftInputFromlAlindow(mEditText.getWindowToken(),0);}}9、网络相关辅助类NetUtilspackagecom.zhy.utils;importandroid.app.Activity;importandroid.content.ComponentName;importandroid.content.Context;importandroid.content.Intent;import.ConnectivityManager;import.Networkinfo;publicstaticvoide(Stringtag.Stringmsg){if(isDebug)Log.i(tag,msg);)publicstaticvoidv(Stringtag.Stringmsg){if(isDebug)Log.i(tag,msg);})网上看到的类，注释上应该原创作者的名字,很简单的一个类;网上也有很多提供把日志记录到SDCard上的，不过我是从来没记录过,所以引入个最简单的,大家可以进行评价是否需要扩充〜〜2、Toast统一管理类packagecom.zhy.utils;importandroid.content.Context;importandroid.widget.Toast;*跟网络相关的工具类****/publicclassNetUtils{privateNetUtils(){/**cannotbeinstantiated**/thrownewUnsupportedOperationException("cannotbeinstantiated");}/***判断网络是否连接**@paramcontext*@returncontext*/publicstaticbooleanisConnected(Contextcontext)ConnectivityManagerconnectivity=(ConnectivityManager).getSystemService(Context.CONNECTIVITY_SERVICE);if(null!=connectivity)Networkinfoinfo=connectivity.getActiveNetworkInfo();if(null!=info&&info.isConnected())if(info.getState()==Networkinfo.State.CONNECTED)returntrue;)})returnfalse;/**判断是否是Wifi连接/publicstaticbooleanisWifi(Contextcontext){ConnectivityManagercm=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);if(cm==null)returnfalse;returncm.getActiveNetworkInfo().getType()==ConnectivityManager.TYPE_WIFI;}/**打开网络设置界面/publicstaticvoidopenSetting(Activityactivity)Intentintent=newIntent("/");ComponentNamecm=newComponentName("com.android.settings"com.android.settings.WirelessSettings");intent.setcomponent(cm);intent.setAction("ent.action.VIEW");activity.startActivityForResult(intent^0);)}10、Http相关辅助类HttpUtilspackagecom.zhy.utils;importjava.io.BufferedReader;importjava.io.ByteArrayOutputStream;importjava.io.lOException;importjava.io.InputStream;importjava・io.InputStreamReader;importjava.io.Printwriter;import.HttpURLConnection;import.URL;*Http请求的工具类*@authorzhy*/5000；5000；privatestaticfinalintTIMEOUT_IN_MILLIONSpublicinterfaceCallBackvoidonRequestComplete(Stringresult);/***异步的Get请求*@paramurlStr*@paramcallback*/publicstaticvoiddoGetAsyn(finalStringurlStr,finalCallBackcallBack){newThread(){publicvoidrun(){try{Stringresult=doGet(urlStr);if(callBack!=null){callBack.onRequestComplete(result);}}catch(Exceptione)e.printStackTrace();}；}.start();}/***异步的Post请求@paramurlStr@paramparams@paramcallBack©throwsException*/params.publicstaticvoiddoPostAsyn(finalStringurlStr^finalStringparams.finalCallBackcallBack)throwsException{newThread(){publicvoidrun()try｝；/**Stringresult=doPost(urlStr^params);if(callback!=null)callBack.onRequestComplete(result);}catch(Exceptione)e.printStackTrace();Get请求，获得返回数据@paramurlStr*©return*©throwsExceptionpublicstaticStringdoGet(StringurlStr)URLurl=null;HttpURLConnectionconn=null;Inputstreamis=null;ByteArrayOutputStreambaos=null;try{url=newURL(urlStr);conn=(HttpURLConnection)url.openConnection();conn.setReadTimeout(TIMEOUT_IN_MILLIONS);conn.setConnectTimeout(TINIEOUT_IN_MILLIONS);conn.setRequestMethod("GET");conn.setRequestProperty("accept""*/*");conn・setRequestProperty("connection"Keep-Alive");if(conn.getResponseCode()==200){is=conn.getlnputstream();baos=newByteArrayOutputStream();intlen=-1;byte[]buf=newbyte[128];while((len=is.read(buf))!=-1){baos.write(buf,0,len);}baos.flush();returnbaos.toString();}else{thrownewRuntimeException("responseCodeisnot200}}catch(Exceptione){e.printStackTrace();}finallytry***Toast统一管理类*/publicclassTprivateT()**cannotbeinstantiated@paramcontext@parammessage*/@paramcontext@parammessage*/thrownewUnsupportedOperationException("cannotbeinstantiated");publicstaticbooleanisShow=true;/**短时间显示Toastif(is!=null)is.close();}catch(lOExceptione){}try{if(baos!=null)baos.close();}catch(lOExceptione){)conn・disconnect();)returnnull;)/***向指定URL发送POST方法的请求*@paramurl发送请求的URL@paramparam请求参数，请求参数应该是namel=valuel&name2=value2的形式。@return所代表远程资源的响应结果©throwsException*/publicstaticStringdoPost(Stringurl.Stringparam){PrintWriterout=null;BufferedReaderin=null;Stringresult="try{URLrealUrl=newURL(url);//打开和URL之间的连接HttpURLConnectionconn=(HttpURLConnection)realUrl.openConnection();〃设置通用的请求属性conn.setRequestProperty("accept""*/*");conn・setRequestProperty("connection""Keep-Alive");conn.setRequestMethod("POST");conn,setRequestProperty("Content-Type""application/x-www-form-urlencoded");conn・setRequestproperty("charset".,"utf-8");conn.setUseCaches(false);//发送POST请求必须设置如下两行conn・setDoOutput(true);conn・setDoInput(true);conn.setReadTimeout(TIMEOUT_IN_MILLIONS);conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);if(param!=null&&!param.trim().equals("")){//获取URLConnection对象对应的输出流out=newPrintwriter(conn.getOutputStream());//发送请求参数out.print(para