Make Android Apps with Source Code - Power Workshop Series

Explore a simple Android calculator layout built with a table layout for buttons, contrasting relative and linear layouts, and separating digit and operation button handlers.

Explore building a calculator app for Android KitKat, selecting a minimum sdk, and implementing digit entry with onClick handlers, decimal point control, and a text view display.

Compare postfix RPN and infix operation flows in calculator design, and implement a pending operation workflow that processes numbers, decimals, and the equals action.

Test and debug a calculator app on a Nexus 4 emulator, fix display and intermediate result bugs, and implement a memory button with recall and clear features.

Create a bouncing ball in Android using a custom canvas, with a velocity vector of (10, 15) that bounces off edges. Paddle not yet implemented.

Move and draw a paddle on an Android canvas with touch input, position it three quarters down, and constrain it within screen bounds for future ball hits and bounces.

Implement paddle collision to bounce the ball and increment points when it hits the paddle; reset the ball and points when it misses, while reducing logging to improve frame rate.

Finish the app with a cyan text paint page, fine-tune on-draw collision, and increase ball velocity on paddle hits while randomizing direction and displaying the score.

Build an Android conversion app using SQLite database, a conversion db, and a cursor adapter. Display conversions in the main activity and add new ones via the options menu.

Add a new conversion activity to collect from units, to units, and a multiplier. Validate inputs, return the data via intent, and insert it into a conversions database for persistence.

Implement an on item click listener to launch a conversion activity with data via a bundle, then input a value and multiply by the factor to get the result.

Place a delete button in the conversion layout to return the conversion ID via intent; the main activity executes a delete query and updates the cursor.

Design an Android roguelike by defining an entity with position, symbol, color, and paint, then move the hero with touch input and render on a canvas.

Model a game inventory by defining item and inventory classes, attaching inventories to players and monsters, and tracking item properties such as identifier, name, symbol, value, attack, defense, and integrity.

Extend the player entity with an inventory and hit points, implement an item system with private attributes, and test combat-ready item management by id and quantity.

Create a master item list as a singleton, build inventories for the hero and chests, and fetch items by name to enable item transfer between hero and chests.