1. What button properties are similar to the properties for a label? 2. Explain
ID: 3812189 • Letter: 1
Question
1. What button properties are similar to the properties for a label? 2. Explain how to set borderwidth, borderColor, and borderRadius properties of the Button Object for an Android phone application. 3. How is the background color of a button set? 4. How would you center a button on a screen? 5. What is an event handler? When is is 'fired off' for a button? 6. How can multiple buttons use the same event handler? 7. How can you disable a button? 8., what is a way that data can be saved after a program is terminated and then restarted again? 9. Explain each element of the application life cycle, including what modules are executed during each cycle.
Explanation / Answer
Solutions:
1.
Labels:
The Label is the smallest control which is used to display some text on the screen.
Button:
Button is a control that performs an action , when tapped or pressed.
Label and Button properties which are similar:
2.
To set Borderwidth property using xml
We can choose any of the following mentioned way to set the border width of a button.
Note:
dp: Density Independent Pixel, it varies based on screen destiny.
borderColor :
There is no concept of borders as an attribute for Button in Android Studio. But you can use a separate drawable.
The same is true for border radius.
We can set the border color and the bordor radius of a Button as follows:
<Button
android:background=“@drawable/yourfile”/>
<selector xmlns:android=“http://schemas.android.com/apk/res/android”>
<item>
<shape android:shape=“rectangle”>
<stroke android:color=“#8A2BE2” android:width=“2dp” />
<corners android:radius=“15dp” />
</shape>
</item>
</selector>
3. Use the following property
<Button
android:background=“#ff2fa0ff” />
4. Use the following prperty
<Button
android:layout_centerHorizontal=“true” />
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