android开发 ，功能代码收集

获取文件的md5值

 /**     * 获取文件的md5值     * @param file     * @return     */    public static String getMd5ByFile(File file) {        String value = "";        FileInputStream in=null;        try {            in= new FileInputStream(file);            MappedByteBuffer byteBuffer = in.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, file.length());            MessageDigest md5 = MessageDigest.getInstance("MD5");            md5.update(byteBuffer);            BigInteger bi = new BigInteger(1, md5.digest());            value = bi.toString(16);        } catch (Exception e) {            e.printStackTrace();        } finally {            if (null != in) {                try {                    in.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return value;    }

获取字符串的md5值

/***获取字符串的md5值*/  public static String getMd5ByString(String string) {        {            try {                MessageDigest md5 = MessageDigest.getInstance("MD5");                md5.update(string.getBytes("UTF-8"));                byte[] encryption = md5.digest();                StringBuffer strBuf = new StringBuffer();                int encryptionLength=encryption.length;                for (int i = 0; i < encryptionLength; i++) {                    if (Integer.toHexString(0xff & encryption[i]).length() == 1) {                        strBuf.append("0").append(Integer.toHexString(0xff & encryption[i]));                    } else {                        strBuf.append(Integer.toHexString(0xff & encryption[i]));                    }                }                return VnTool.replaceBlank(strBuf.toString());            } catch (NoSuchAlgorithmException e) {                return "";            } catch (UnsupportedEncodingException e) {                return "";            }        }    }

版本更新

• 权限

    <uses-permission android:name="android.permission.INTERNET"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

• jar包：okhttp3; okio; okhttputils-2_6_2; gson
• 代码

import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.SharedPreferences;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.net.Uri;import android.os.Build;import android.support.v4.content.FileProvider;import android.text.TextUtils;import android.util.Log;import android.widget.Toast;import com.google.gson.Gson;import com.zhy.http.okhttp.OkHttpUtils;import com.zhy.http.okhttp.callback.FileCallBack;import com.zhy.http.okhttp.callback.StringCallback;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.math.BigInteger;import java.nio.MappedByteBuffer;import java.nio.channels.FileChannel;import java.security.MessageDigest;import okhttp3.Call;import static android.content.Context.MODE_PRIVATE;/** * 版本更新器 * Created by zxjz on 17-6-15. */public class Updater {   private boolean needResponse=false;   private Context context;   private VersionBean versionBean;   private static final String preferencesName ="VersionUpdatePreference";   private static final String key_latestVersionCode ="versionCode";   private static final String key_forcedUpdate="forcedUpdate";   private static final String key_localPath ="localPath";   private static final String key_md5="md5";    private static final String static_checkUpdateUrl="http://116.62.12.119/version/latest/apk/";   private  String checkUpdateUrl="";    private boolean printLog=true;    private InstallDialogAble dialogAble=null;   private   String localCachePath;    /**     * 检查升级的接口     * @param context     * @param checkUpdateUrl     */   public Updater(Context context, String checkUpdateUrl) {       if (TextUtils.isEmpty(checkUpdateUrl)){           this.checkUpdateUrl=static_checkUpdateUrl+context.getPackageName();       }else {           this.checkUpdateUrl=checkUpdateUrl+context.getPackageName();       }       this.context = context;       localCachePath=new File( "/sdcard/VersionUpdater/updater/").getPath()+"/";       File file=new File(localCachePath);        if (!file.exists()){            file.mkdirs();        }   }    /**     * 检查版本更新     * @param shouldDialog 是否显示升级提示对话框     * @param dialogAble 具备弹框能力的对话框接口，参考 defaultdialogAble，可以为空，当为空时，会使用默认的弹框 defaultdialogAble     */    public void checkForUpdate(boolean shouldDialog,InstallDialogAble dialogAble){        if (shouldDialog){                this.dialogAble=dialogAble!=null?dialogAble:defaultdialogAble;        }       log("开始联网检查版本更新：url="+checkUpdateUrl);        OkHttpUtils.get().url(checkUpdateUrl).build().execute(new StringCallback() {            @Override            public void onError(Call call, Exception e, int i) {                e.printStackTrace();                String msg="获取云端版本信息失败."+e.getMessage();                reply(msg);                log(msg);                log("检查缓存更新...");                checkUpdateInCache();            }            @Override            public void onResponse(String result, int i) {                boolean noResult=true;                if (result != null) {                    log("result:" + result);                    VersionBean remoteVersion=null;                    try{                        remoteVersion= new Gson().fromJson(result, VersionBean.class);                    }catch (IllegalStateException e){                        e.getMessage();                    }                    if (remoteVersion != null&& !TextUtils.isEmpty(remoteVersion.downloadLink)) {                        noResult=false;                        log("remoteVersion:"+remoteVersion.toString());                        int selfVersionCOde=getVersionCode(context);                        if (remoteVersion.versionCode>selfVersionCOde){                            VersionBean cache = getCache();                            boolean ableInstallCache=false;                            if (cache!=null){                                if (cache.versionCode==remoteVersion.versionCode){                                    log("检查缓存");                                    ableInstallCache= checkUpdateInCache();                                }                            }                            if (!ableInstallCache){                                downloadNewVersion(remoteVersion);                            }                        }else {                            reply("已是最新版本.");                        }                    }                }                if (noResult){                    reply("获取版本信息失败.");                }            }        });    }    /**     * 检查缓存中是否有可以更新的版本，如果有就更新     * @return 返回是否可以通过缓存更新     */    private boolean checkUpdateInCache() {        VersionBean cacheVersion = getCache();        if (cacheVersion==null){            log("缓存中无可以更新.");            return false;        }        File upapk=new File(cacheVersion.localPath);        if (upapk!=null){            log("缓存文件存在"+cacheVersion.localPath);            String fmd5=getMd5ByFile(upapk);            log("缓存md5记录："+cacheVersion.md5+",缓存apk文件MD5:"+fmd5);        }else {            log("缓存文件不存在"+cacheVersion.localPath);        }        boolean b = upapk!=null&&getMd5ByFile(upapk).equalsIgnoreCase(cacheVersion.md5);        if (b){            attemptInstallNewVersion(cacheVersion);        }        return b;    }    private void log(String s) {        if (printLog){            Log.d("versionUpdater",""+s);        }    }    /**     * 获取已经缓存的版本信息     * @return     */    private VersionBean getCache(){        SharedPreferences preferences=context.getApplicationContext().getSharedPreferences(preferencesName,MODE_PRIVATE);        versionBean =new VersionBean();        versionBean.localPath =preferences.getString(key_localPath,"");        versionBean.versionCode =preferences.getInt(key_latestVersionCode,-1);        versionBean.forcedUpdate =preferences.getBoolean(key_forcedUpdate,true);        versionBean.md5=preferences.getString(key_md5,"");        if (versionBean.versionCode<=getVersionCode(context)){            return null;        }        return versionBean;    }    /**     * 保存最新版本到缓存     * @param versionBean     */    private void saveCache(VersionBean versionBean) {        log("cache():"+ versionBean.toString());        SharedPreferences preferences=context.getApplicationContext().getSharedPreferences(preferencesName,MODE_PRIVATE);        SharedPreferences.Editor editer = preferences.edit();        editer.putBoolean(key_forcedUpdate, versionBean.forcedUpdate);        editer.putInt(key_latestVersionCode, versionBean.versionCode);        editer.putString(key_localPath, versionBean.localPath);        editer.putString(key_md5,versionBean.md5);        editer.commit();    }    private void downloadNewVersion(final VersionBean remoteVersion) {        log("下载更新...");        String url=remoteVersion.downloadLink;        final String newApkName=context.getString(R.string.app_name)+"_v"+remoteVersion.versionCode+".apk";        OkHttpUtils.get().url(url).build().execute(new FileCallBack(localCachePath,newApkName) {            @Override            public void onError(Call call, Exception e, int i) {                log("下载更新文件失败");                e.printStackTrace();            }            @Override            public void onResponse(File file, int i) {                if (file!=null) {                    String fileMd5=getMd5ByFile(file)+"";                    if(fileMd5.equalsIgnoreCase(remoteVersion.getMd5())) {                        log("downloadNewVersion():" + file.getAbsolutePath() + ", path:" + file.getPath());                       VersionBean versionBean = remoteVersion;                        versionBean.localPath = localCachePath + newApkName;                        log("缓存到本地的路径："+versionBean.localPath);                        saveCache(versionBean);                        attemptInstallNewVersion(versionBean);                    }else{                        log("downloadNewVersion():下载的更新文件md5:"+fileMd5+",与服务器的md5:"+remoteVersion.getMd5()+"不匹配");                    }                }else {                    log("downloadNewVersion():下载的更新文件file==null");                }            }        });    }   public interface   InstallDialogAble{     void onCanbeUpdate(boolean forcedUpdate, Exector erector);   }    public class Exector {       private Updater updater;        private VersionBean willInstallVersion;        public Exector(Updater updater, VersionBean versionBean) {            this.updater = updater;            this.willInstallVersion=versionBean;        }        public void install(){            updater.install(willInstallVersion);        }    }    private InstallDialogAble defaultdialogAble=new Updater.InstallDialogAble(){        @Override        public void onCanbeUpdate(final boolean ForcedUpdate, final Updater.Exector exector) {            String msg=ForcedUpdate?"程序有重大更新,请您更新到最新版本使用.":"程序有可用的新版本,是否现在更新?";            String negativeStr=ForcedUpdate?"退出":"取消";            android.support.v7.app.AlertDialog alertDialog=                    new  android.support.v7.app.AlertDialog.Builder                            (context)                            .setTitle("版本更新")                            .setMessage(msg)                            .setPositiveButton("更新", new DialogInterface.OnClickListener() {                                @Override                                public void onClick(DialogInterface dialog, int which) {                                    exector.install();                                }                            })                            .setNegativeButton(negativeStr, new DialogInterface.OnClickListener() {                                @Override                                public void onClick(DialogInterface dialog, int which) {                                    if (ForcedUpdate){                                        String msg=context.getString(R.string.app_name)+"需要更新,请您更新后使用.";                                        Toast.makeText(context,msg,Toast.LENGTH_SHORT).show();                                        System.exit(0);                                    }                                }                            })                            .setCancelable(false)                            .show();        }    };    public InstallDialogAble getDefaultdialogAble() {        return defaultdialogAble;    }    public void setDialogAble(InstallDialogAble dialogAble) {        this.dialogAble = dialogAble;    }    private void attemptInstallNewVersion(VersionBean versionBean) {        log("attemptInstallNewVersion()");        if (dialogAble!=null) {            Exector exector=new Exector(this,versionBean);            dialogAble.onCanbeUpdate(versionBean.forcedUpdate,exector);        }else {            install( versionBean);        }    }    public void install(VersionBean versionBean){        log("开始安装");        File newApkFile=new File(versionBean.localPath);        if (newApkFile==null){            log("安装文件是空");            return;        }        log("启动系统安装界面");        String packageName=context.getPackageName();        installApp(context,newApkFile,packageName);    }    private void reply(String string){//        log(string);        if (needResponse) {//            SystemManger.self().getInteractiveAble().reply(string, null);//            SystemManger.self().getInteractiveAble().reply(string,null);        }    }    private class VersionBean {        /**         * clientType : android         * versionCode : 2         * md5 : AEA3BD557B00C62D232B85DA81DD28ED         * forcedUpdate : false         * downloadLink : 182.92.160.8:8889/app-version/apk/com.smart.chat/2/app-release.apk         */        private String clientType;        private int versionCode;        private String md5;        private boolean forcedUpdate;        private String downloadLink;        public String localPath;        @Override        public String toString() {            return "VersionBean{" +                    "clientType='" + clientType + '\'' +                    ", versionCode=" + versionCode +                    ", md5='" + md5 + '\'' +                    ", forcedUpdate=" + forcedUpdate +                    ", downloadLink='" + downloadLink + '\'' +                    ", localPath='" + localPath + '\'' +                    '}';        }        public String getClientType() {            return clientType;        }        public void setClientType(String clientType) {            this.clientType = clientType;        }        public int getVersionCode() {            return versionCode;        }        public void setVersionCode(int versionCode) {            this.versionCode = versionCode;        }        public String getMd5() {            return md5;        }        public void setMd5(String md5) {            this.md5 = md5;        }        public boolean isForcedUpdate() {            return forcedUpdate;        }        public void setForcedUpdate(boolean forcedUpdate) {            this.forcedUpdate = forcedUpdate;        }        public String getDownloadLink() {            return downloadLink;        }        public void setDownloadLink(String downloadLink) {            this.downloadLink = downloadLink;        }    }    /**     * 获取版本名称     * @param context 上下文     * @return 版本名称     */    public static String getVersionName(Context context){        //获取包管理器        PackageManager pm = context.getPackageManager();        //获取包信息        try {            PackageInfo packageInfo = pm.getPackageInfo(context.getPackageName(),0);        //返回版本号            return packageInfo.versionName;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }        return null;    } /**     * 获取版本号     * @param context 上下文     * @return 版本号     */    public static int getVersionCode(Context context){        //获取包管理器        PackageManager pm = context.getPackageManager();        //获取包信息        try {            PackageInfo packageInfo = pm.getPackageInfo(context.getPackageName(),0);        //返回版本号            return packageInfo.versionCode;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();      }      return 0;   }    /**     * 获取文件的md5值     * @param file     * @return     */    public static String getMd5ByFile(File file) {        String value = "";        FileInputStream in=null;        if (file==null){            return value;        }        try {            in= new FileInputStream(file);            MappedByteBuffer byteBuffer = in.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, file.length());            MessageDigest md5 = MessageDigest.getInstance("MD5");            md5.update(byteBuffer);            BigInteger bi = new BigInteger(1, md5.digest());            value = bi.toString(16);        } catch (Exception e) {            e.printStackTrace();        } finally {            if (null != in) {                try {                    in.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return value;    }    /**     * 安装apk     * @param context     * @param apkFile apk文件     * @param pakgname 包名     */    public static void installApp(Context context, File apkFile, String pakgname) {        if(apkFile == null||context==null) {            return ;        } else {            Log.d("installApp","执行安装，文件名；"+apkFile.getName()+",包名："+pakgname+"content="+context);            Intent intent = new Intent("android.intent.action.VIEW");            String var4 = "application/vnd.android.package-archive";            Uri var3;            if(Build.VERSION.SDK_INT < 24) {                var3 = Uri.fromFile(apkFile);            } else {                try {                    intent.setFlags(1);                    var3 = FileProvider.getUriForFile(context.getApplicationContext(), pakgname, apkFile);                }catch (Exception e){                    var3 = Uri.fromFile(apkFile);                }            }            intent.setDataAndType(var3, var4);            context.startActivity(intent);        }    }}