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USING SIMPLE NOTEPAD ANDROID
USING SIMPLE NOTEPAD CODE

Summing up, we can conclude that tools: context attribute is appended in the root element of the layout file and provides information about the activity or fragment, to which the layout file is associated. Themes need to defined in the Manifest file as they are associated with activities, whereas one layout file is associated with several activities.įurthermore, the tools: context XML attribute is used for locating the accurate location invoking onClick handlers for performing operations or for rendering the action bar.

USING SIMPLE NOTEPAD ANDROID

If you add the tools: context explicitly during definition, the Android Studio automatically creates an instance of the layout while preview, this eliminates the hassle of setting the preview settings manually, later. The activity class name is added in this attribute, using a dot prefix, analogous to the syntax used in the manifest file. In the above-mentioned XML layout code, the prime need of tools: context is to specify which activity or fragment is synced with the layout file, by default during the definition of the layout. What is tools:context=”.MainActivity” included in the layout file? Image depicts the layout structure with and without the weight attributeģ. This is a very efficient method for accurate allocation of space in various layouts, rather than assigning the height and width values after tedious mathematical calculations.įor instance, if you can a child layout to occupy 70% of the screen, then set its weight to 0.7 and the weightSum of its parent layout to 1.0. WeightSum divides the entire parent layout into pre-defined values the proportion allotted to each layout depends on its individual weight value, and the total WeightSum of the parent layout or container. weightSum is considered to be the total value of all the layout size ratios.įor convenience, weightSum accepts floating values, as in 1.2, 3.4, and so on for expressing ratios. In reference to the Android documentation, android: weightSum defines the maximum weight sum. If the weightSum value is not specified explicitly in the XML code, by default, it is computed as the submission of the weight of individual layout components. What is the significance of the attribute android:weightSum=”10″ in the XML code? Image depicts an Android layout with weight=0.5Ģ. For allowing any view element to occupy the entire remaining space, set its weight as zero. If you have to design a linear layout in which each view element occupies a distinct amount of space then, assign the weight to the view elements proportionally.

Finally, set the android:layout_weight of each view to “1”.

Set the android:layout_width of each view to “0dp” (for a horizontal layout).

Set the android:layout_height of each view to “0dp” (for a vertical layout).

each component occupies a space an equal space, follow these steps: If you intend to create a linear layout with equal distribution, i.e. Weight should be assigned considering proportion among the view elements. A large weight value allows the liberty of stretching to any void space in the parent layout. Weight implicitly assigns an “importance” value to the child layouts in terms of size, it can occupy when placed on the screen. By default, the layout weight is equal to zero.

USING SIMPLE NOTEPAD CODE

For instance, refer to the image given below, for ensuring both the buttons occupy exactly half of the screen width, you need to set the Layout weight as 0.5 in the XML code of the Layout.Īpart from the parent, linear layout also allows developers to assign specific weight to each of its children individually. The Layout weight attribute is added in the XML code for specifying the size of the Child Views of any container (parent layout). What is the significance of the attribute android:layout_weight=”1″ in the XML code? The complete XML code for the UI design shown in the image: ġ. One for opening any previously saved file.A linear layout that acts as the parent.The User-Interface of the Notepad app is very elementary and can be created by adding a single XML code.

Analogous to the usual android apps, the creation of the Notepad App also involves two aspects, one is the UI designing and the other is the backend programming. You can include any of those by just adding the Gradle scripts in the build. Usually, the code of such apps is very redundant and bewildering, but kudos to the default Java classes that abstract most of the laborious source code into its libraries. The untainted strategy includes the creation of an app with more features than the competitor, even if a single feature of your app stands-out among the same kind, your app will receive very high traffic in the Google Play store or App store. It assists you in acquiring hands-on knowledge about working with Java Input stream and Output stream and file with.

Although, the idea might appear to be redundant, yet it is very progressive for learners.