Codingtube team Full source code how to use the SoundPool class to play short, repetitive sound clips. Since API level 21 (Android Lollipop), the old SoundPool constructor is deprecated, so we will also learn, how to use the new SoundPool.Builder class. We will define a streamType for the old constructor and a usage and contentType for the … Read more
Full source code to build a simple dice roller app. We will display our dice as images in an ImageView. When we click on it, we generate a random number between 1 and 6 and then show the results by setting the appropiate dice image on our ImageView with the setImageResource method activity_main.xml MainActivity.java
Full project with source code in Android how to upload images from our device to Firebase and then retrieve and display these images in a RecyclerView. For this we will use the Firebase storage and database as well as the Picasso library Dependencies: com.android.support:recyclerview-v7:28.0.0 com.android.support:support-compat:28.0.0 com.squareup.picasso:picasso:2.71828 activity_images.xml activity_main.xml AndroidManifest.xml image_item.xml ImageAdapter.java ImagesActivity.java MainActivity.java Upload.java
Full project with source code f we just load in image from a url into an ImageView without further resizing, Picasso will load the full sized, high resolution image into the device’s memory and scale it down to the ImageView’s size. This leads to unnecessary memory consumption. In this video we will learn how to … Read more
Full project with source code to create a Singleton class for our Volley RequestQueue, so we can use the same RequestQueue instance throughout the whole lifetime of our app, instead of just creating it with the context of a single activity. This is the recommended approach if your app makes constant use of network requests … Read more
Full project with source code how to send an email from our app via ACTION_SEND intent. The user can type in multiple recipients divided by commas, a subject and a message. When he clicks the “send” button, he will be prompted with an app chooser popup, where he can then choose an email client installed … Read more
activity_main.xml Full project with source code how to set OnClickListeners for multiple buttons and handle them all in one onClick method. Instead of passing an anonymous inner class to the setOnClickListener method, we will pass the activity itself and implement the OnClickListener interface into our MainActivity. We will then use a switch/case statement to check … Read more
Full project with source code by using the OkHttp library to make a simple asynchronous HTTP request, download a JSON from a URL and display it in a TextView. For this we will use OkHttp’s enqueue method which executes the network call in a background thread. To update the TextView we will then access our … Read more
Full source code how we can add a sliding transition between activities. We will first apply them to specific activities only by using the overridePendingTransition method after starting an intent and also after calling the finish method. Then we will learn how to apply them globally to our whole app by creating a seperate theme … Read more