【Android智能硬件开发】【004】通过PackageInstaller静默安装apk

前言

智能硬件不同于普通手机，大多是无人值守的，所以升级时只能采用静默升级，即后台自动升级的方式

PackageInstaller是安卓系统底层用于apk安装的管理类，只有系统级别的应用，才能使用这个类的功能

关于如何将APK升级为系统应用，我们在上篇博客中已经讲解过了

静默安装apk

apkFile是apk文件相当于存储卡根目录的路径

packageName是要安装的apk的包名

安装apk代码

	//静默升级APP
	@SneakyThrows
	public void silenceInstall(String apkFile, String packageName) {
	    //写入APK到InstallerSession
	    PackageInstaller installer = activity.getPackageManager().getPackageInstaller();
	    PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL);
	    int sessionId = installer.createSession(params);
	    PackageInstaller.Session session = installer.openSession(sessionId);
	    writeApkToSession(session, apkFile, packageName);
	    //安装APK
	    Intent intent = new Intent(activity, HomeActivity.class);
	    intent.setAction("com.android.package.installer.session.PACKAGE_INSTALLED");
	    PendingIntent pendingIntent = PendingIntent.getActivity(activity, 0, intent, 0);
	    IntentSender sender = pendingIntent.getIntentSender();
	    session.commit(sender);
	}
	
	//写入APK到InstallerSession
	@SneakyThrows
	protected void writeApkToSession(PackageInstaller.Session session, String apkFile, String packageName) {
	    String file = AndroidFile.getAndroidExternalFile(apkFile);
	    OutputStream os = session.openWrite(packageName, 0, -1);
	    InputStream is = new FileInputStream(file);
	    byte[] buffer = new byte[1024 * 1024];
	    int len;
	    while ((len = is.read(buffer)) >= 0)
	        os.write(buffer, 0, len);
	    os.flush();
	    os.close();
	    is.close();
	}

调用代码

	//调用
	WorkThread.post(() -> {
	    handler2.silenceInstall("222.apk", "com.tencent.qqpinyin");
	});

安装回调，安装需要一段时间，由于是静默安装，看不到任何界面，请耐心等待

	@Override
	protected void onNewIntent(Intent intent) {
	    String action = intent.getAction();
	    Bundle extras = intent.getExtras();
	    if ("com.android.package.installer.session.PACKAGE_INSTALLED".equals(action)) {
	        int status = extras.getInt(PackageInstaller.EXTRA_STATUS);
	        boolean success = status == PackageInstaller.STATUS_SUCCESS;
	        TipBox.tipInCenter(success ? "静默安装成功" : "静默安装失败");
	    }
	}

之所以能触发此回调，是因为我们在安装的Intent中，设置了对应的Action

只要我们Activity的Action与之相匹配，就可以被该Action调用打开