Tag Archives: API

Opening a PDF on Android with Delphi

Intents on Android using API 26 to open PDF documents.

Recently, the Google Play store updated its requirements so the target API level of 26 was used to get new apps submitted. While this was reasonably easy to achieve through updating the AndroidManifest.Template, the change to the newer API changed the behaviour of my application.

Before the update, I would download a file to the CachePath and then share to a public folder. I would then get a URI for the public folder path file and share via Intents.  Following the update, this no longer worked. After a little research, I discovered this was due to the changes in the Android security system, that actually, make a lot of sense. Rather than sharing the file outside the application, you now provide tempory access to it via the Intent. To achieve this, you need to setup a Provider, (this is done via XML) and then programmatically provide the path as a ‘content://’ URI, set flags for allowing read / write access via the intent and share it.

The video shows how to achieve this and demo’s the working code. To help, below are some of the XML blocks you will need upon the way.

Adding Provider

Add this to the AndroidManifest.template in the source code root folder, before the </application> tag. This is then used to build all Android apps.

<provider android:name="android.support.v4.content.FileProvider"
android:resource="@xml/fileprovider" />

Provider file

Create a fileprovider.xml (or whatever file name you set in android:resource when declaring the provider).

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

More flags and details for Provider Files can be found on the Android documentation

Delphi 64bit Code

Updating 32bit code to Delphi 64bit

Ever since Delphi XE2, it has been possible to generate Delphi 64bit applications from the same code base as your traditional Windows 32bit Delphi code. The business case for 64-bit for business is covered in this tech paper The Impact of 64-bit Applications to your Company’s Bottom Line.

On the whole moving to 64bit (on iOS or Windows) is beautifully simple to achieve! It can be just as simple as adding the Delphi 64bit Windows target platform in the project manager and rebuilding the project.

My experience from talking to many developers who have moved up is that normally there are a few things to check in your code but typically its not a massive task to get compiling and ready to test.

A lot has been recorded on moving from Windows 32bit to Windows 64bit Delphi and this should be a useful summary if your just planning now moving up from older versions of Delphi to Delphi 10. If you are building iOS applications, then you will need to use the 64bit build now to get into the AppStore. Thankfully, Delphi has made the task of using 64bit very simple across all platforms and protected us from the headaches non Delphi Developers have had on the whole.

Lets start with this short video from David I who covers some the foundations in 7 minutes!

Continue reading Delphi 64bit Code

Calling Objective C API’s with Delphi and Appmethod

Jacob Thurman from TwoDesk Software did a great developer skill sprint session on “Integrating more iOS with an Objective-C Call in your Delphi App” last week. If you have not been on them, the developer skill sprints series are excellent 20 minute deep dives into specific technologies in RAD Studio and Appmethod using both Delphi programming and C++ programming language.

What I like about this video is that it assumes no knowledge of Objective C and explains excellently the difference between Delphi, C++ and Objective C.