前言

本文介紹安卓app全量更新

安卓app更新實(shí)現(xiàn)

一舷礼、實(shí)現(xiàn)更新步驟介紹
1、請求接口獲取到服務(wù)器版本和apk包的下載地址尉桩；
2筒占、獲取本地包版本；
3蜘犁、對比服務(wù)器版本和本地版本翰苫；
4、服務(wù)器版本大这橙，需要更新奏窑，下載apk包，使用手機(jī)已經(jīng)存在的第三方工具打開apk包屈扎；
5埃唯、安裝apk包。
二助隧、詳細(xì)代碼
1筑凫、在AndroidManifest.xml中
1)配置所需要的權(quán)限

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

2)在application標(biāo)簽下添加

android:requestLegacyExternalStorage="true"

3)在application里添加

   <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="com.example.myupdateapplication.fileprovider"
            android:exported="false"

            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/filepaths" />
        </provider>

2、創(chuàng)建xml文件夾并村，在xml文件夾下創(chuàng)建一個(gè)名為filepaths.xml的resouce文件
中的代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <paths>
        <external-path
            name="external"
            path="." />
        <external-path
            name="download"
            path="" />
    </paths>
</resources>

3巍实、UpdateManager里代碼

package com.example.myupdateapplication.utils;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.core.content.FileProvider;
import com.example.myupdateapplication.R;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
/**
 * 更新管理
 * 作者：created by fanHongJiao
 */
public class UpdateManager {
    private Context mContext;
    //是否是最新
    private boolean isNew=false;
    private boolean intercept=false;
    private String apkUrl="https://file.shinedin.com/update_demo.apk";//線上apk地址
    //保存APK的文件夾
    private static String savePath;
    //apk文件的絕對路徑
    private static String saveFileName;
    //下載線程
    private Thread downLoadThread;
    private int progress;//當(dāng)前進(jìn)度
    TextView text;
    //進(jìn)度條與通知UI刷新的handler和msg常量
    private ProgressBar mProgress;
    private static final int DOWN_UPDATTE=1;
    private static final int DOWN_OVER=2;
    private Handler mHandler=new Handler(){
        public void handleMessage(Message msg){
            switch (msg.what){
                case DOWN_UPDATTE:
                    mProgress.setProgress(progress);
                    break;
                case DOWN_OVER:
                    installApk2();
                    break;
                default:
                    break;
            }
        }
    };

    public UpdateManager(Context context){
        mContext=context;
        //獲取存儲路徑，改存儲目錄在的
        savePath=String.valueOf(mContext.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS))+"/";
    }

    /**
     * 獲取應(yīng)用的版本號
     * @param context
     * @return
     */
    public static int getVersionCode(Context context){
        PackageManager manager=context.getPackageManager();
        int code=0;
        PackageInfo info= null;
        try {
            info = manager.getPackageInfo(context.getPackageName(),0);
            code=info.versionCode;
            Log.e("code",code+"");

        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return code;
    }

    public void checkVersion(){
        int version=2;//服務(wù)器獲取到的版本號
        if(UpdateManager.getVersionCode(mContext)<version){
            //本地版本小于服務(wù)器版本哩牍，存在新版本
            isNew=false;
        }else{
            isNew=true;
        }
        checkUpdateInfo();//判斷isNew,檢查是否需要更新操作

    }

    private void checkUpdateInfo() {
        if(isNew){
            Toast.makeText(mContext,"已是最新版本",Toast.LENGTH_SHORT).show();
            return;
        }else {
            showUpdateDialog();
        }
    }

    /**
     * 顯示更新程序?qū)υ捒蚺锪剩┲鞒绦蛘{(diào)用
     */
    private void showUpdateDialog() {
        AlertDialog.Builder builder=new AlertDialog.Builder(mContext);
        builder.setTitle("軟件更新");
        builder.setMessage("有最新的軟件包，是否下載膝昆！");
        builder.setPositiveButton("下載", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                shoeDownloadDialog();
            }
        });
        builder.setNegativeButton("以后再說", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();
            }
        });
        builder.create().show();
    }

    private void shoeDownloadDialog() {
        AlertDialog.Builder builder=new AlertDialog.Builder(mContext);
        builder.setTitle("軟件更新");
        LayoutInflater inflater=LayoutInflater.from(mContext);
        View v=inflater.inflate(R.layout.progress,null);
        mProgress=(ProgressBar)v.findViewById(R.id.progress);
        builder.setView(v);
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                intercept=true;//取消下載的標(biāo)識
            }
        });
        builder.show();
        downloadApk();
    }

    /**
     *
     * 從服務(wù)器下載apk包
     */
    private void downloadApk() {
        downLoadThread=new Thread(mdowApkRunable);//開啟一個(gè)新的線程下載apk
        downLoadThread.start();
    }

    private Runnable mdowApkRunable=new Runnable() {
        @Override
        public void run() {
            URL url;
            try {
            //對sd卡進(jìn)行狀態(tài)的判斷丸边，如果相等的話表示當(dāng)前的sdcard掛載在手機(jī)并且是可用的
            if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){//改目錄
                    url=new URL(apkUrl);
                HttpURLConnection connection=(HttpURLConnection)url.openConnection();
                connection.connect();
                int length=connection.getContentLength();
                InputStream ins=connection.getInputStream();
                //創(chuàng)建安裝包所在的前置文件夾
                File file=new File(savePath);
                if(!file.exists()){
                    file.mkdir();
                }
                //創(chuàng)建安裝包的文件，安裝包將下載入這個(gè)文件夾中
                long time=System.currentTimeMillis();//當(dāng)前時(shí)間的毫秒數(shù)
                saveFileName=savePath+time+"_apkupdate.apk";
                File apkFile=new File(saveFileName);
                //創(chuàng)建文件夾的輸入流
                FileOutputStream fos=new FileOutputStream(apkFile);
                int count=0;
                byte[]buf=new byte[1024];
                while (!intercept){//對取消下載的標(biāo)志進(jìn)行判斷荚孵，如果一直沒有被打斷即沒有點(diǎn)擊取消下載按鈕則繼續(xù)下載
                    int numread=ins.read(buf);//返回讀入的字節(jié)個(gè)數(shù)并將讀到的字節(jié)內(nèi)容放入buf中
                    count +=numread;
                    progress=(int)(((float)count/length)*100);//當(dāng)前進(jìn)度妹窖，用來更新progeessBar的進(jìn)度
                    //通知主線程更新下載進(jìn)度
                    mHandler.sendEmptyMessage(DOWN_UPDATTE);
                    if(numread<=0){
                        //下載完成通知安裝,自動安裝
                        mHandler.sendEmptyMessage(DOWN_OVER);
                        break;
                    }
                    //已經(jīng)全部讀入，不需要再讀入字節(jié)為-1的內(nèi)容
                    fos.write(buf,0,numread);
                }

            }else
                return;
            } catch (IOException e) {
                Log.e("mdowApkRunable",e.getMessage());
                e.printStackTrace();
            }
        }
    };

    private void installApk2(){
        if(saveFileName!=null){
            if(saveFileName.endsWith(".apk")){
                if(Build.VERSION.SDK_INT>=24){//判斷版本是否在7.0以上
                    File file=new File(saveFileName);
                    String authority=mContext.getPackageName()+".fileprovider";//此處的值和AndroidManifes里的provider標(biāo)簽里的authorities值保持一致
                    Uri apkUri=FileProvider.getUriForFile(mContext,authority,file);
                    Intent install=new Intent(Intent.ACTION_VIEW);
                    install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                    install.setDataAndType(apkUri,"application/vnd.android.package-archive");
                    mContext.startActivity(install);
                }else {
                    Intent install=new Intent(Intent.ACTION_VIEW);
                    install.setDataAndType(Uri.fromFile(new File(saveFileName)),"application/vnd.android.package-archive");
                    install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
                    mContext.startActivity(install);
                }
            }
        }
    }
}

4收叶、DowloadActivityDemon2里代碼

package com.example.myupdateapplication.utils;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import com.example.myupdateapplication.R;
import java.io.File;
public class DowloadActivityDemon2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dowload_demon2);
        findViewById(R.id.btn_down).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                UpdateManager updateManager=new UpdateManager(DowloadActivityDemon2.this);
                updateManager.checkVersion();//檢查更新
            }
        });
    }
}

完結(jié)骄呼。