[移动开发]Android11 静默安装实现

? ? ? ? ?前一阵刚好有个项目需求有静默安装， 巴拉巴拉将以前的实现方式拉出来用， 验证的时候报错，提示解析文件不存在之类的，抱歉， 具体的错误信息没记录下来^_^，然后瞬间不知咋弄了， 上个厕所抖一个机灵后想起android不是有个安装器么？可以看看他是怎么实现的。根据源码步骤写了一个工具， 后面验证OK， 特此记录一下， 免的以后要用又找不到了， 工具代码如下：?

package com.android.silentinstall;

import android.annotation.TargetApi;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInstaller;
import android.os.Build;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.TimeUnit;

public class SilentInstallManager {
    private final static SynchronousQueue<Intent> mInstallResults = new 
                                    SynchronousQueue<>();

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public static synchronized boolean silentInstallApk(Context context, 
                            final String apkFilePath) {
        boolean ret = false;
        File apkFile = new File(apkFilePath);
        PackageInstaller installer = context.getPackageManager().getPackageInstaller();                     
        PackageInstaller.SessionParams sessionParams = new
                        PackageInstaller.SessionParams(
                                PackageInstaller.SessionParams.MODE_FULL_INSTALL);     
        sessionParams.setSize(apkFile.length());
        int sessionId = createSession(installer, sessionParams);
        if (sessionId != -1) {
            boolean isCopyOk = copyInstallApkFile(sessionId, installer, apkFilePath);                                                            
            if (isCopyOk) {          
                boolean isInstalled = installPackage(context, sessionId,     
                                             installer,apkFilePath);
                if (isInstalled ){
                    ret = true;
                }
            }
        }
        return ret;
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private static int createSession(PackageInstaller installer,         
                              PackageInstaller.SessionParams sessionParams) {
        int sessionId = -1;
        try {
            sessionId = installer.createSession(sessionParams);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sessionId;
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private static boolean copyInstallApkFile(int sessionId, PackageInstaller installer,
                                String apkFilePath) {
        InputStream in = null;
        OutputStream out = null;
        PackageInstaller.Session session = null;
        boolean ret = false;
        try {
            File apkFile = new File(apkFilePath);
            session = installer.openSession(sessionId);
            out = session.openWrite("base.apk", 0, apkFile.length());
            in = new FileInputStream(apkFile);
            int count;
            byte[] buffer = new byte[65536];
            while ((count = in.read(buffer)) != -1) {            
                out.write(buffer, 0, count);
            }
            session.fsync(out);
            ret = true;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            session.close();
       }
       return ret;
   }            
    
   @TargetApi(Build.VERSION_CODES.LOLLIPOP)
   private static boolean installPackage(Context context, int sessionId,
                               PackageInstaller installer,  String filePath) {
       PackageInstaller.Session session = null;
       boolean ret = false;
       try {
           session = installer.openSession(sessionId);
           Intent intent = new Intent();
           intent.setAction("com.example.install");
           PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 1, intent, 
                                             PendingIntent.FLAG_UPDATE_CURRENT);
           session.commit(pendingIntent.getIntentSender());
           final Intent intentResult = mInstallResults.poll(60, TimeUnit.SECONDS);
           if (intentResult != null) {
               final int status = intentResult.getIntExtra(PackageInstaller.EXTRA_STATUS,
                                    PackageInstaller.STATUS_FAILURE);
               if (status == PackageInstaller.STATUS_SUCCESS) {
                   ret = true;
               }
           }
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           session.close();
       }
       return ret;
    }
}

?调用：

? ? ? ?

 try {
?    new Thread(new Runnable() {
? ? ?    @Override
? ? ? ? ?public void run() {? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ????????? 
             SilentInstallManager.silentInstallApk(MainActivity.this, ? ? ? ? ?? ? ? ? ? ?     
                                                    "/sdcard/Download/koudai.apk");
? ? ? ? ?}
?  ? }).start();
?} catch (Exception e){
?  ? e.printStackTrace();
?}

????????