Android安全卫士-检测升级（一）

欢迎界面做完了接下来就进行检测升级这部分的内容

设置APK包的相关属性

在Gradle Scripts->build.gradle(Module: app)

apply plugin: 'com.android.application'//说明module的类型，com.android.application为应用程序，com.android.library为库android {    compileSdkVersion 26 //编译的SDK版本。编译该app时候，你想使用到的api版本。    buildToolsVersion "26.0.1" //构建工具的版本号。    defaultConfig { //defaultConfig方法包含了该app的核心属性，该属性会重写在AndroidManifest.xml中的对应属性。        applicationId "com.lt.android.securityguards" //应用程序的包名        minSdkVersion 19 //支持的最低版本        targetSdkVersion 26 //支持的目标版本        versionCode 1 //版本号        versionName "1.0" //版本名        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"         //AndroidJUnitRunner类是一个JUnit测试运行器,允许运行JUnit 3或JUnit 4测试类在Android设备上,包括那些使用Espresso和UI Automator框架。    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }    packagingOptions{ //设置APK包的相关属性        exclude 'META-INF/DEPENDENCIES.txt'        exclude 'META-INF/LICENSE.txt'        exclude 'META-INF/NOTICE.txt'        exclude 'META-INF/NOTICE'        exclude 'META-INF/LICENSE'        exclude 'META-INF/DEPENDENCIES'        exclude 'META-INF/notice.txt'        exclude 'META-INF/license.txt'        exclude 'META-INF/dependencies.txt'        exclude 'META-INF/LGPL2.1'    }}dependencies {    compile fileTree(dir: 'libs', include: ['*.jar'])    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {        exclude group: 'com.android.support', module: 'support-annotations'    })    compile 'com.android.support:appcompat-v7:26.+'    compile 'com.android.support.constraint:constraint-layout:1.0.2'    testCompile 'junit:junit:4.12'}

我们此处主要是添加packagingOptions部分的代码，在修改完build.gradle文件后会有如下提示，须点击Sync Now才可运行程序

修改build.gradle文件后会提示

这一段主要为后面导包做铺垫，不加上这一段就会出错

新建目录与文件

先新建所需目录与文件，右键->New->

新建子包

先新建m1home目录，然后在其目录下新建entity和utils目录，在utils目录下新建名为DownloadUtils、VersionUtils和MyUtils的Java Class，在entity目录下新建VersionEntity

如果你之前将项目传到Github仓库过，那么新建文件后会提示

GitHub

此时若点击No则此文件不会上传到github，且文件名颜色为暗红色，若点击Yes则文件名为绿色，文件名为蓝色则表示修改过此文件

导入第三方jar包

将目录显示模式从Android改为Project

libs目录

然后将下载好的第三方jar包粘贴到app/libs下

接着点击菜单栏的Build->Edit Libraries Dependencies

Edit Libraries Dependencies Project Structure

点击下方的 + -> Jar dependency，将刚刚导入的三个包逐个加入，接着目录就会如下显示

libs目录

增加权限

打开AndroidManifest.xml清单文件增加此应用的权限

<?xml version="1.0" encoding="utf-8"?>

下载工具类

DownloadUtils

package com.lt.android.securityguards.m1home.utils;import android.app.DownloadManager;import android.content.Context;import android.net.Uri;import android.webkit.MimeTypeMap;/** * Created by lt on 2017/10/20. */public class DownloadUtils {    public void downloadApk(String url,String targetFile, Context context){        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));        request.setAllowedOverRoaming(false);        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();        String mimeString = mimeTypeMap.getMimeTypeFromExtension(mimeTypeMap.getFileExtensionFromUrl(url));        request.setMimeType(mimeString);        request.setDestinationInExternalPublicDir("/download",targetFile);        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);        request.setVisibleInDownloadsUi(true);        DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);        long mTaskid = downloadManager.enqueue(request);    }}

检测本地版本号

MyUtils

package com.lt.android.securityguards.m1home.utils;import android.content.Context;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;/** * Created by lt on 2017/10/20. */public class MyUtils {    public static String getVersion(Context context){        //PackageManager可以获取清单文件中的所有信息        PackageManager packageManager = context.getPackageManager();        try{            //getPackageInfo获取当前程序的包名            PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(),0);            return packageInfo.versionName;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();            return "";        }    }}

版本信息实体类

VersionEntity

package com.lt.android.securityguards.m1home.entity;/** * Created by lt on 2017/10/20. */public class VersionEntity {    /**服务器版本号*/    public String versionCode;    /**版本描述*/    public String description;    /**apk下载地址*/    public String apklurl;}

版本更新工具类

VersionUpdateUtils

package com.lt.android.securityguards.m1home.utils;import android.app.Activity;import com.lt.android.securityguards.m1home.entity.VersionEntity;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.params.HttpConnectionParams;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;import java.io.IOException;/** * Created by lt on 2017/10/20. */public class VersionUpdateUtils {    //本地版本号    private String mVersion;    private Activity context;    private VersionEntity versionEntity;    public VersionUpdateUtils(String mVersion, Activity context) {        this.mVersion = mVersion;        this.context = context;    }    //获取服务器版本号    public void getCloudVersion() {        try {            HttpClient httpClient = new DefaultHttpClient();            //连接超时            HttpConnectionParams.setConnectionTimeout(httpClient.getParams(), 5000);            //请求超时            HttpConnectionParams.setSoTimeout(httpClient.getParams(), 5000);            HttpGet httpGet = new HttpGet("http://android2017.duapp.com/updateinfo.html");            HttpResponse excute = httpClient.execute(httpGet);            if (excute.getStatusLine().getStatusCode() == 200) {                //请求和响应都成功了                HttpEntity entity = excute.getEntity();                String result = EntityUtils.toString(entity, "utf-8");                //创建jsonObject对象                JSONObject jsonObject = new JSONObject(result);                versionEntity = new VersionEntity();                versionEntity.versionCode = jsonObject.getString("code");                versionEntity.description = jsonObject.getString("des");                versionEntity.apklurl = jsonObject.getString("apkurl");                if (!mVersion.equals(versionEntity.versionCode)) {                    //版本不同需升级                    System.out.println(versionEntity.description);                    DownloadUtils downloadUtils = new DownloadUtils();                    downloadUtils.downloadApk(versionEntity.apklurl, "mobileguard.apk", context);                }            }        } catch (IOException e) {            e.printStackTrace();        } catch (JSONException e) {            e.printStackTrace();        }    }}

欢迎界面逻辑

SplashActivity

package com.lt.android.securityguards;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.TextView;import com.lt.android.securityguards.m1home.utils.MyUtils;import com.lt.android.securityguards.m1home.utils.VersionUpdateUtils;public class SplashActivity extends AppCompatActivity {    private TextView mTvVersion;    private String mVersion;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_splash);        mVersion = MyUtils.getVersion(getApplicationContext());        mTvVersion = (TextView) findViewById(R.id.tv_splash_version);        mTvVersion.setText("版本号："+mVersion);        final VersionUpdateUtils versionUpdateUntils = new VersionUpdateUtils(mVersion,SplashActivity.this);        new Thread(){            @Override            public void run() {                super.run();                versionUpdateUntils.getCloudVersion();            }        }.start();    }}

微调欢迎界面

activity_splash.xml

<?xml version="1.0" encoding="utf-8"?>