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

---

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();
    }
}

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微调欢迎界面

• activity_splash.xml