I am trying to make a code editor for various programming languages but I am unable to add autocomplete feature to it.
I tried to use MultiAutoCompleteTextView but it takes , as the default separator between words.
For reference I want to make an app like ACODE
Use this line in your code:
yourmultiAutoCompletetextViewname.setTokenizer(new SpaceTokenizer());
This will make space as a seperator between two words.
Is there a way to make a textfield (EditText, TextView) on Android which displays copyable text (no edit options)? Something like Swing's JTextField().setEditable(false) on Windows?
Edit: It seems that my question was a little bit unclear, so I'm going to give it some real-world context. I am working on a checksum calculator which lets you pick a file and prints the results of the calculation into 4 different textfields. I want the user to be able to copy those hashes from the textfield, but to disable all edit options.
I believe what you are asking is very straightforward and simple, if I am reading your question wrong, please correct me!
Are the four text fields that hold the results required to be EditText 's?
otherwise - >
Question:
How to make TextView only copyable, not editable
Answer:
Well using a TextView solves the not editable part
and if you take a look
at my android studio. I have a simple TextView with an attribute of
textIsSelectable="true"
allowing users to copy and paste!
Hope this helped!
-Stephen
I am creating a custom keyboard for android devices and i have managed to implement everything but being able to move up and down lines through the use of buttons not just dragging with your finger. I am implementing this for small screens of older devices.
I have managed to implement moving the cursor one character to the left and right and to the end and start of the text how ever i cannot figure out how to implement moving up and down multiple lines like you would when navigating a word document on a normal computer.
I am not sure how you programmed all that, and it sounds like some really nice work, so not sure if you had this idea or if it is even possible, but:
Couldn't you make the cursor move to the right x-Times when trying to go down a line, where x is the amount of characters in one line, or rather the length of the String in a line?
Depending on the way you programmed it, if there is a string for each line, you could see where the cursor is in the line you are going from (e.g at the 3rd character of the String) and then just put it there in the next line.
I am wondering if there are any good options to implement a rich text editor in Android. Please note I am talking about a rich text editor that can be used in an Android application, not the one embedded in a web page using HTML and Javascript.
My requirements are:
Basic formatting (color, fonts, highlight, bold, italic, underline, etc.)
Hyperlinks
Inline images
Bullet lists and numbered lists
Inline table (only the contents inside a cell is editable, not the table structure)
As you can see, this is pretty much something quite similar to a typical RichEdit control on Windows.
Here are some efforts (investigation & prototyping) I have made so far:
Using WebView
I have tried using a WebView control to load an HTML fragment with one . The content becomes editable and as it is HTML, I suppose it can meet most of my requirements. But it has several issues:
(deadly) No text caret. The user will have no idea where his/her typed characters will be inserted.
The on-screen soft keyboard is not visible by default. There is a trick that the user has to long-press the Menu button to bring up the keyboard. But I think this is a very bad user experience. Besides, the screen layout is not properly rearranged and the text inserting point sometimes will be covered by the keyboard.
Using EditText
I have tried using the EditText control. It seems to support some level of rich text editing (color, fonts, bold, italic, underline, inline images, bullet lists). But I still cannot figure out how I can implement the following requirements:
Control the appereance of the bullet symbol (dot, circle, dash, arrow, star, etc.)
Numbered list (1., 2., 3., etc.)
Table
BTW, I have seen there are several *Span classes out there but I am not sure if they can be any help... And the http://developer.android.com does not provide much useful information about them.
So, how on earth can I implement a rich text editor on Android?
Can I extends the EditText and add my new functionalities? Or should I do something from scratch - extends the View and implement everything by myself? For later option (extending View), I actually even don't know how to show a text caret and blink it, not mentionging moving the caret with user typing.
I am desperate now... Any hints?
Thanks!
-Tony
(EDIT)
After some further investigation, it looks like extending EditText would be my best bet. I somehow figured out how to use those Span classes and guess I should be able to do most of the tricks by using (extending) them.
For example, extending the BulletSpan and overriding drawLeadingMargin should give me the control of the bullet appereances. Extending the LeadingMarginSpan should help me on the numbered list.
As to the table, my initial plan is to extend the LineBackgroundSpan and draw all the table borders in the drawBackground override. However, I still need to figure out how to layout all the text in the table cells and properly handle the caret movement and selection. Suggestions?
I just published my rich text editor component under the Apache 2.0 license:
https://github.com/1gravity/Android-RTEditor
You can make use of any of the following libraries:-
https://github.com/commonsguy/cwac-richedit
https://github.com/chinalwb/Android-Rich-text-Editor
https://github.com/wasabeef/richeditor-android
https://github.com/irshuLx/Android-WYSIWYG-Editor
I would probably extend both EditText and TableLayout or at least end up using most of their source if there were big enough changes I needed to make.
Can you do the following:
Manually hold the contents in the EditText as your own model (ie by seperating and maintaing the content document and the view attributes as seperate entities).
Override the render (or draw method) to do custom layout on parts of the content document (part of your model) that handle non text characters (say bullets with particular attribute).
To me seems like if you have to muck about with the layout, are you better off writing it from scratch on your own. From what I remember the Edit text (and the richt text editor) is great for anything where you the data is pure text.
There is an open source EditText rich text editor called android-richtexteditor but the code was inexplicably deleted in r5. The code is still there in r4; just use svn to check out r4 or earlier to access it. The code appears to support italics, underline, color picker, text size, and more.
Also answered in these questions: 1, 2
Extend from EditText is a best choice for you, it support CharacterSpan and
ParagraphSpan.
See my App on the Google Play:
https://play.google.com/store/apps/details?id=com.hly.notes
Check this open source Wordpress mobile application for android.It has very promising Richtexteditor based on Edittext.
You can download the source from here
Thanks
I'm working on an 'IDE' for Android - it could be useful for editing short scripts / making quick adjustments to files. At the moment I'm just using a simple EditText, but I am wanting to add several features, for example Line Numbering down the left hand side of the EditText and Code Highlighting.
Does anyone have any suggestions about how to approach this? For the code highlighting, I'm guessing I'll need to write my own subclass of EditText. For the line numbering, could I have a thin vertical TextView that has the same text size as the EditText??
Yes, I'm aware editing code on a mobile sized screen is painful.
Thanks!
The stock Email application uses an html view (android.webkit.WebView) to wrap even text emails in html. Perhaps rendering the code into html and displaying in a WebView would be a good way to get syntax highlighting.
For line numbering, the thin TextView beside the EditText seems reasonable. You might want to encapsulate it into your own View class that handles both subviews - and allows line numbers to be turned on and off (and perhaps does other good things like keep text size of both equal)
I think an ide for Android is a good idea. Would be nice to be able to code on an airplane without having to get the tray table involved =)