android 约束布局案例

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteY="81dp"
tools:layout_editor_absoluteX="0dp">

<ImageView
android:id="@+id/imageView12"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="2dp"
app:layout_constraintBottom_toTopOf="@+id/guideline2"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toLeftOf="@+id/guideline3" />

<ImageView
android:id="@+id/imageView13"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="2dp"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@color/colorAccent" />

<ImageView
android:id="@+id/imageView10"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="2dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintTop_toTopOf="@+id/guideline"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintBottom_toTopOf="@+id/guideline2" />

<ImageView
android:id="@+id/imageView11"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@color/colorAccent" />

<ImageView
android:id="@+id/imageView9"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintRight_toLeftOf="@+id/guideline3"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@color/colorAccent"
app:layout_constraintLeft_toLeftOf="@+id/guideline5" />

<android.support.constraint.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.67" />

<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/guideline"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.33" />

<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/guideline3"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.75" />

<android.support.constraint.Guideline
android:id="@+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.58" />

<android.support.constraint.Guideline
android:id="@+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.41" />

<android.support.constraint.Guideline
android:id="@+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.25" />

<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toLeftOf="@+id/guideline4"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="2dp"
android:layout_marginBottom="2dp"
app:layout_constraintBottom_toTopOf="@+id/guideline" />

<ImageView
android:id="@+id/imageView4"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toLeftOf="@+id/guideline4"
android:layout_marginRight="2dp"
android:layout_marginLeft="2dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline"
android:layout_marginTop="0dp"
android:layout_marginBottom="2dp"
app:layout_constraintBottom_toTopOf="@+id/guideline2"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintVertical_bias="0.0" />

<ImageView
android:id="@+id/imageView5"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:srcCompat="@color/colorAccent"
app:layout_constraintTop_toTopOf="@+id/guideline2"
android:layout_marginTop="2dp"
android:layout_marginLeft="2dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/guideline4"
android:layout_marginRight="2dp"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintVertical_bias="0.505" />

<ImageView
android:id="@+id/imageView6"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
android:layout_marginRight="2dp"
android:layout_marginLeft="2dp"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
android:layout_marginTop="2dp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="2dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintVertical_bias="0.0" />

<ImageView
android:id="@+id/imageView8"
android:layout_width="0dp"
android:layout_height="0dp"
app:srcCompat="@color/colorAccent"
app:layout_constraintRight_toLeftOf="@+id/guideline5"
android:layout_marginRight="2dp"
android:layout_marginLeft="2dp"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="2dp"
app:layout_constraintTop_toTopOf="@+id/guideline2"
android:layout_marginTop="2dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline6" />
</android.support.constraint.ConstraintLayout>
<!-- app:layout_constraintHorizontal_bias 水平偏移量，取值0~1，默认0.5
app:layout_constraint本源_to目标="目标id"

-->