Android Studio实现APK的更新、下载、安装

先不讲那么多看效果图：

下面来讲解一些更新CODE，原理大家都知道，不废话，直接上代码。里面有一些是我自己做的测试例子，所以大家可以直接删掉就好了

第一个：activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.fucm.wms_jianh.MainActivity">

     <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/btn_sq"
         android:id="@+id/btn_sq"
         android:layout_alignParentTop="true"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="197dp" />

     <ListView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/listView"
         android:layout_toStartOf="@+id/btn_sq"
         android:layout_alignParentTop="true"
         android:layout_alignParentEnd="true" />

     <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="更新"
         android:id="@+id/button"
         android:layout_below="@+id/btn_sq"
         android:layout_centerHorizontal="true"/>

 </RelativeLayout>

第二个：MainActivity.java

package com.example.fucm.wms_jianh;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

import MyClass.HttpHelper;
import MyClass.SoftUpdate;

public class MainActivity extends Activity implements OnClickListener{
    Button btn1,btn2;
    ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectDiskReads().detectDiskWrites().detectAll() // or
                // .detectAll()
                // for all
                // detectable
                // problems
                .penaltyLog().build());
        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                .detectLeakedSqlLiteObjects().detectLeakedClosableObjects()
                .penaltyLog().penaltyDeath().build());
        setContentView(R.layout.activity_main);
        btn1 = (Button) findViewById(R.id.btn_sq);
        btn2 = (Button) findViewById(R.id.button);
        btn1.setOnClickListener(this);
        listView = (ListView)findViewById(R.id.listView);
        btn2.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                SoftUpdate manager = new SoftUpdate(MainActivity.this);
                // 检查软件更新
                manager.checkUpdate();
            }
        });
    }
}

第三个：HttpHelper.java

package MyClass;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
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.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONObject;

import java.io.IOException;

public class HttpHelper {
    private static final int REQUEST_TIMEOUT =  * ;
    private static final int SO_TIMEOUT =  * ;

    public static String sendHttpRequest(String pUrl) {
        String result;
        result = doGet(pUrl);
        return result;
    }
    public static String doGet(String url) {
        String result = null;
        HttpParams httpParams = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(httpParams, REQUEST_TIMEOUT);
        HttpConnectionParams.setSoTimeout(httpParams, SO_TIMEOUT);
        HttpClient httpClient = new DefaultHttpClient(httpParams);
        HttpGet httpGet = new HttpGet(url);
        try {
            HttpResponse response = httpClient.execute(httpGet);

            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {

            }
            result = EntityUtils.toString(response.getEntity(), "UTF-8");
        } catch (IOException e) {
            //Log.i("GET", "Bad Request!");
        }
        return result;
    }
    public static String GetJsonListValue(String str) {
        String strError="";
        try {
            JSONObject json1 = new JSONObject(str);
            JSONObject tmp = json1.getJSONObject("d");
            return tmp.getString("a");
        } catch (Exception e) {
            strError=e.toString();
        }
        return strError;

    }

    public static JSONArray GetJsonValue(String str) {

        try {
            JSONArray json1 = new JSONArray(str);
            return json1;
        } catch (Exception e) {
            //strError=e.toString();
        }
        return null;
    }
}

第四个：SoftUpdate.java

package MyClass;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.example.fucm.wms_jianh.R;

import org.json.JSONArray;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Created by fucm on 2016-07-06.
 */
public class SoftUpdate {

    /* 下载中 */
    private static final int DOWNLOAD = ;
    /* 下载结束 */
    private static final int DOWNLOAD_FINISH = ;
    /* 保存解析的XML信息 */
    private Long str_version;
    private String str_appname;
    private String str_downurl;
    /* 下载保存路径 */
    private String mSavePath;
    /* 记录进度条数量 */
    private int progress;
    /* 是否取消更新 */
    private boolean cancelUpdate = false;

    private Context mContext;
    /* 更新进度条 */
    private ProgressBar mProgress;
    private Dialog mDownloadDialog;

    public SoftUpdate(Context context)
    {
        this.mContext = context;
    }

    private Handler mHandler = new Handler()
    {
       public void handleMessage(Message msg)
        {
            switch (msg.what)
            {
                // 正在下载
                case DOWNLOAD:
                    // 设置进度条位置
                    mProgress.setProgress(progress);
                    break;
                case DOWNLOAD_FINISH:
                    // 安装文件
                    installApk();
                    break;
                default:
                    break;
            }
        };
    };

    /**
     * 检测软件更新
     */
    public void checkUpdate()
    {
        if (isUpdate())
        {
            // 显示提示对话框
            showNoticeDialog();
        } else
        {
            Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();
        }
    }

    /**
     * 检查软件是否有更新版本
     *
     * @return
     */
    private boolean isUpdate(){
        // 获取当前软件版本
        int versionCode = getVersionCode(mContext);
        //通过服务器获得版本号
        try {
            String str = HttpHelper.sendHttpRequest("http://127.0.0.1/Service1.svc/get_version");
            JSONArray json1 =HttpHelper.GetJsonValue(str);
            str_version=json1.getLong();
            str_appname=json1.getString();
            str_downurl=json1.getString();
            if (str_version > versionCode) {
                return true;
            }
        }
        catch (Exception e) {
            //strError=e.toString();
        }
        return false;
    }

    /**
     * 获取软件版本号
     *
     * @param context
     * @return
     */
    private int getVersionCode(Context context)
    {
        int versionCode = ;
        try
        {
            // 获取软件版本号，对应AndroidManifest.xml下android:versionCode
            versionCode = context.getPackageManager().getPackageInfo("com.example.fucm.wms_jianh", ).versionCode;
        } catch (PackageManager.NameNotFoundException e)
        {
            e.printStackTrace();
        }
        return versionCode;
    }

    /**
     * 显示软件更新对话框
     */
    private void showNoticeDialog()
    {
        // 构造对话框
        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle(R.string.soft_update_title);
        builder.setMessage(R.string.soft_update_info);
        // 更新
        builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
                // 显示下载对话框
                showDownloadDialog();
            }
        });
        // 稍后更新
        builder.setNegativeButton(R.string.soft_update_later, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
            }
        });
        Dialog noticeDialog = builder.create();
        noticeDialog.show();
    }

    /**
     * 显示软件下载对话框
     */
    private void showDownloadDialog()
    {
        // 构造软件下载对话框
        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle(R.string.soft_updating);
        // 给下载对话框增加进度条
        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.soft_update, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
        builder.setView(v);
        // 取消更新
        builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
                // 设置取消状态
                cancelUpdate = true;
            }
        });
        mDownloadDialog = builder.create();
        mDownloadDialog.show();
        // 现在文件
        downloadApk();
    }

    /**
     * 下载apk文件
     */
    private void downloadApk()
    {
        // 启动新线程下载软件
        new downloadApkThread().start();
    }

    /**
     * 下载文件线程
     *
     * @author coolszy
     *@date 2012-4-26
     *@blog http://blog.92coding.com
     */
    private class downloadApkThread extends Thread
    {
        @Override
        public void run()
        {
            try
            {
                // 判断SD卡是否存在，并且是否具有读写权限
                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
                {
                    // 获得存储卡的路径
                    String sdpath = Environment.getExternalStorageDirectory() + "/";
                    mSavePath = sdpath + "download";
                    URL url= new URL(str_downurl);
                    // 创建连接
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.connect();
                    // 获取文件大小
                    int length = conn.getContentLength();
                    // 创建输入流
                    InputStream is = conn.getInputStream();

                    File file = new File(mSavePath);
                    // 判断文件目录是否存在
                    if (!file.exists())
                    {
                        file.mkdir();
                    }
                    File apkFile = new File(mSavePath, str_appname);
                    FileOutputStream fos = new FileOutputStream(apkFile);
                    int count = ;
                    // 缓存
                    byte buf[] = new byte[];
                    // 写入到文件中
                    do
                    {
                        int numread = is.read(buf);
                        count += numread;
                        // 计算进度条位置
                        progress = (int) (((float) count / length) * );
                        // 更新进度
                        mHandler.sendEmptyMessage(DOWNLOAD);
                        if (numread <= )
                        {
                            // 下载完成
                            mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
                            break;
                        }
                        // 写入文件
                        fos.write(buf, , numread);
                    } while (!cancelUpdate);// 点击取消就停止下载.
                    fos.close();
                    is.close();
                }
            } catch (MalformedURLException e)
            {
                e.printStackTrace();
            } catch (IOException e)
            {
                e.printStackTrace();
            }
            // 取消下载对话框显示
            mDownloadDialog.dismiss();
        }
    };

    /**
     * 安装APK文件
     */
    private void installApk()
    {
        File apkfile = new File(mSavePath, str_appname);
        if (!apkfile.exists())
        {
            return;
        }
        // 通过Intent安装APK文件
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        mContext.startActivity(i);
    }

}

第五个：soft_update.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <ProgressBar
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/update_progress"/>
</LinearLayout>

第六个：AndroidManifest.xml（创建的时候自带）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.fucm.wms_jianh"
          android:versionCode=""
          android:versionName="1.0">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".RwdMxActivity">
         </activity>
    </application>

</manifest>

更正一下：有的APK的版本信息是在build.gradle这个里面

第七个：strings.xml（创建的时候自带）

<resources>
    <string name="app_name">WMS_JIANH</string>
    <string name="btn_sq">任务索取</string>
    <string name="soft_update_no">已经是最新版本</string>
    <string name="soft_update_title">软件更新</string>
    <string name="soft_update_info">检测到新版本，立即更新吗</string>
    <string name="soft_update_updatebtn">更新</string>
    <string name="soft_update_later">稍后更新</string>
    <string name="soft_updating">正在更新</string>
    <string name="soft_update_cancel">取消</string>
</resources>

第八个：看看工程结构

提供源码下载：https://yunpan.cn/cBFKmGJKqiLct  访问密码 6e01