在Android Studio 中使用Kotlin编写TextView、Button、Toast 介绍的话我就不说了,可以看我的第一篇关于Kotlin的文章,讲了为什么要用Kotlin的原因,进入正题,我们现在已经重新创建了一个Kotlin的项目,我在activity_main.xml文件中放了一个id为tv_hello的TextView和一个id为btn_test的Butto
import kotlinx.android.synthetic.main.activity_main.* 1. 这句话的意思是引进Kotlin的的控件变量自动映射功能,接下来只要是这个activity_main.xml文件中的控件,我们就都不需要在调用findViewById方法来获取对象了。如下图所示 相信很容易看明白吧,布局文件中TextView的text属性是“Hello World!”,我们通过代码改成...
我在activity_main.xml文件中放了一个id为tv_hello的TextView和一个id为btn_test的Button, 然后在Ma...
Button的content参数(也就是上面lambda),传入多个组件,Button会将其按照水平方式排列(即Button可视为Row布局) 由于kotlin的语法特性,所以我们可以在后面以花括号写个lambda函数 这里先讲下比较简单的参数: onClick是点击事件.也是接收一个函数 modifier是修饰符,本章先不使用,之后出个篇文章,专门讲解下这个的用法 enabl...
https://qin-dong.github.io/2019/09/11/kotlin-android-button-example/ Kotlin Android Button 1. Implement the setOnClickListener of Button 2. Implement the View.OnClickListner and override its function 3. Ad...Activity Qin-Dongadded gitalk /2019/09/11/kotlin-android-button-example/ on Sep ...
View demo.apk Version support ComposeViews version jetpack compose version compose-multiplatform version kotlin version 1.7.1 1.7.0 2.0.0+ 1.6.11.4 1.6.7 1.6.11 2.0.0+ 1.6.0.4 1.6.1 1.6.0 1.9.22 1.5.10.5 1.5.4 1.5.10 1.9.20 1.5.1.5 1.5.0 1.5.1 1.9.0 1.5.0.3 1.5.0 1.5.0 1....
You might be tempted at first to write a single and huge Composable function that implements the button and encompasses all of its aspects. That might result in very complex code that will be pretty hard to maintain. Is there a structured way in which we can implement the button?
In your module-level build.gradle file, add the following dependencies: apply plugin: 'kotlin-kapt' dependencies { implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs') releaseImplementation files('libs/AmazonPayAndroidLib-release.aar') implementation 'androidx.activity:activity-comp...
gravity using the android:gravity attributeandroid:onClick is used to set the function in the Kotlin activity to be triggered when the RadioButton is clicked.android:buttonTint is used to set the color of the circular button. By default, it is set to the colorAccent specified in the styles...
findViewById<Button>(R.id.apayButton).apply { setOnClickListener { onButtonClicked() } } } } 5.Load your app and make sure the button shows the text “Pay with Amazon”. Confirm the button renders correctly across all supported screen densities. For guidance on handling multiple screen ...