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How to analyze Android API, I believe that many inexperienced people are helpless about this, this article summarizes the causes and solutions of the problem, through this article I hope you can solve this problem.

1. Android API structure

public class Button extends TextView java.lang.Object android.view.View android.widget.TextView android.widget.Button

known direct subclass

CompoundButton

known indirect subclass

CheckBox RadioButton ToggleButton

II. Overview of Android API

The Android API represents a button widget. The user performs an action by pressing a button, or clicking a button. Here is a typical application of a button in activity:

You can then specify a method in the xml layout via the android:onClick attribute of the button instead of setting the OnClickListener for the button in the activity. For example:

Now, when the user clicks the button, the Android system calls the activity's selfDestruct(View) method. To perform correctly, this method must be public and accept only one argument of type View. For example:

III. Android API Button Style

The default style of each button is the background of the system button. Different devices and platform versions have different button styles. If you're not happy with the default button style and want to customize it to fit your application's design, you can replace the button's background image with a state list drawable. A state list drawable is a drawable resource defined in XML that changes its picture according to the state of the current button. Once you define a state list drawable in XML, you can apply it to your android:background attribute.

After reading the above, do you know how to analyze Android API? If you still want to learn more skills or want to know more related content, welcome to pay attention to the industry information channel, thank you for reading!

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