Android使用PackageInstaller安装应用

private boolean installApkFile(File apkFile)
{
	try {
		PackageInstaller packageInstaller = mPackageManager.getPackageInstaller();
		PackageInstaller.SessionParams params = new  PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL);
		int sessionId = packageInstaller.createSession(params);
		PackageInstaller.Session session = packageInstaller.openSession(sessionId);
    	if(!apkFile.exists())
    	{
			Logg.d("未找到应用程序安装文件！");
			return false;
		}

		try(InputStream in = new FileInputStream(apkFile);OutputStream out = session.openWrite("app",0,-1))
		{
			byte[] buffer = new byte[65536];
			int c;
			while((c = in.read(buffer)) != -1)
			{
				out.write(buffer,0,c);
			}
 			session.fsync(out);
    	}
    	
	   session.commit(PendingIntent.getBroadcast(ServerCommunicationService.this,0,new Intent("INSTALL_COMPLETE"), 0).getIntentSender());
       Logg.d("应用程序安装完成！");
	} catch (IOException e) {
		e.printStackTrace();
		return false;
	}
	apkFile.setWritable(true);
	boolean isDelete = apkFile.delete();
	if(isDelete)
		Logg.d("应用程序源文件删除成功！");
	else
		Logg.d("应用程序源文件删除失败！");
	return true;
}