Here I will show two different ways to create collapsing AppBar in flutter. Watch Video Tutorial Using NestedScrollView I have the sample image parrot.jpg in the images folder and added to pubspec.yaml. SliverAppBar expands to its expandedHeight when user scrolls the view below the AppBar. Using CustomScrollView Here we… Read More »
In this post I will be telling you about how to change the default theme of ActionBar with our own custom One. Here I will be changing the background color, textColor and alpha of default ActionBar. Let’s see how it is done. By Checking out the styles.xml you will find that by default it looks like this. Right… Read More »
“performSelectorInBackground” will call anyfunction to execute in background and you can also pass string parameters with this method or if you want to pass more params then pass the parameters as an object. [self performSelectorInBackground:@selector(myBackgroundMethod:) withObject:@”String Params”];
Here is a simple example showing how to load a database values in a spinner in android. OK we will start. This is the layout for the spinner row. spinner_row.xml This is the layout for the interface. activity_main.xml Now this is the MainActivity.java file that uses the spinner and the database. Join the Forum discussion on this post… Read More »
Hello all…… I have written a lost of posts on Listviews. You can see that by just searching Listviews in my site. Today I will show you how to create a slide out animation while we delete a row from a ListView. So this is the xml that contains the ListView. Let it be in the main.xml main.xml… Read More »
Here is a complete example of How to read and write files to SDCARD and application SandBox in Android. First create a new project and inside the mainActivity paste this code. Now create another class named MyFile.java and copy this code into it. Now the layout for the xml file. Note you should give this permission in the… Read More »
Hello everyone… Today I will show you how to create a simple widget in android? First create a new project and name it “Widget1” and name the activity “WidgetDemo1“. Actually we dont need the activity class here. You can delete it and delete the corresponding entry of it from the AndroidManifest file also. Now we will make the… Read More »
Hello everyone… In this post I will show you how to listen to hardware button in an android smartphone. This post especially shows how to listen to the home button in android. But my advice is never override the home button in your app. Home button is to move the currently running process to background. But you can… Read More »
Hello everyone… In today’s tutorial I will show you how to create a custom toggle button in android. Often in our applications we don’t need a default toggle button, so I will show you how to change that to make a toggle button according to your need. First I will create a fresh project named “CustomToggleButton” and name… Read More »
Hi all….. In this post I will show you how to read a text file in ANDOID. Let your file is in the your application sandbox of your ANDOID project, i.e the file’s location is /data/data/your_package_name folder. To view this folder -> open File Explorer and expand each folder. For this example to work first push te file… Read More »
Hello all…. I have covered many tutorials on styles on how to implement and use them. Today I will show you how to inherit from other styles or how to extend a style already created by you and use it for applying to other views. Here is one of my previous posts. http://www.coderzheaven.com/2012/02/03/changing-the-style-or-theme-of-default-alertdialog-in-android/ Another one is here.. http://www.coderzheaven.com/2011/06/19/styling-text-in-android-through-xml/… Read More »
Hello all……….. Android has been absoultely wonderful for customizing widgets. I have shown a lot of example to customize ListViews, spinners etc. Today I will show you how to customize gridviews. Using this method you can actually place anything inside a gridview even a webview also. So here we start. We customize a gridview by creating an adapter… Read More »
Hello all………. We have seen many posts about ListViews like creating a listview, adding data to it, customizing a listview etc. Take a look at some of these examples 1. Single Selection ListView in android 2. Flitering a ListView using an input from an EditText in Android. 3. How to create a custom ListView in android? 4. Android… Read More »
Hello everyone, I have already showed you how to use a SlidingViewer to create a slidingWindow. Today I will show another way to create such a window with the help of animation. Please check one of my previous posts to do this in another way. How to show a sliding window from below in Android? Check this new… Read More »
Sliding-Drawer in a nice and useful widget in android. Please check one of my previous posts to do this in another way. How to show a sliding window from below in Android? Check this new One using Navigation Drawer About Sliding drawer SlidingDrawer hides content out of the screen and allows the user to drag a handle to… Read More »
Hello all…….. In today’s post I will show you send mail from an android application progrmatically.. Let’s go to the code fast…… This is the code in the mail java file…. Now the layout file (main.xml) The AndroidManifest.xml Note: However if you test this in your emulator, it will not work. Install it in your device to test… Read More »
Beautifying our applications is one of the main features of your application’s success. In ANDROID there are many possible ways to do this. For eg. We need to have different colors for our buttons, However we can give backgrounds for buttons and all. But we can do many by using our custom xml files, like changing colors on… Read More »
A series of frames is drawn one after the other at regular intervals. For this create a xml which contains ImageView for showing the animation The main java file is Next the main part, an xml which holds each image and duration in which each image shows. The xml should be placed inside drawable folder When i click… Read More »
When you are working on an Android application that stores data in a SQLite database.There arise many questions like where does this database file get stored on the filesystem ? How can we access the database? I will give solution to all these problems. I created the SQLite database from my previous post about Using SQLite in ANDROID… Read More »
Hello ANDROID Lovers…….. In today’s tutorial I will show you how to deal with SQLite Databases in ANDROID. You know that SQLite are Lightweight databases which is maintained only on the client side. They don’t need a server. The SQLite databases are simply a file wrapped around with some stuff which helps us deal with them like a… Read More »
By adding a custom shape we can make the layout more attractive. For this we have to create a xml file and specify this in the main layout xml file First make a xml inside the drawable folder. Then in the main file specify this shape like this. The “category” is the name of the xml specifying the… Read More »
