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Learning ConstraintLayout and running into this issue where the baseline constraint handle does not become visible even as a text view is selected.
Using Android Studio 3.4.1, Show All Constraints is selected.
gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.myapplication"
minSdkVersion 28
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
838
A baseline is a horizontal invisible line that is centered in a view. A view can only have one baseline used to align it horizontally. To add a baseline, right-click on the view that you want to align the baseline to that of another view. Select show baseline .
The TextView above has three types of handles: Resize handle - It's present on the four corners and is used to resize the view, but keeping its constraints intact. Side handle - It's the circular handle present on the centre of each side. It's used to set the top, left, bottom and right constraints of the view.
More complex layout but results are the same, flat Constraint Layout is slower than nested Linear Layout. I want to pay attention to 2 more things which are more subjective. Creating Constraint Layout takes more time than other layouts. Also introducing changes in existing Constraint Layout is much more time-consuming.
Open the layout file (activity_main. xml) in Android Studio and click the Design tab at the bottom of the editor window. In the Component Tree window, right-click LinearLayout and then choose Convert layout to ConstraintLayout from the context menu.
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