问题
I want to fill the screen in a two-dimensional grid of 3x6 TextViews. This means that each TextView must be 1/3 of the full screen width and the height 1/6 of the full screen height. I am using a ConstraintLayout for this layout, since LinearLayouts are bad practise for this layout as nested weights are bad for performance. Currently, I am using the percentage 0.333333333333333 and 0.166666666666667 for respectively the width and height, as shown below.
<TextView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toLeftOf="@id/text_view_theme_remove"
app:layout_constraintBottom_toTopOf="@id/text_view_theme_percentage"
app:layout_constraintWidth_default="percent"
app:layout_constraintWidth_percent="0.333333333333333"
app:layout_constraintHeight_default="percent"
app:layout_constraintHeight_percent="0.166666666666667"
android:gravity="center"
android:id="@+id/text_view_theme_unknown"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="@android:color/transparent"
app:autoSizeTextType="uniform"
android:text="@string/unknown"/>
I was wondering whether it is possible to set the percentages as fractions? Thus for the width 1/3 and the height 1/6?
回答1:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android" >
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="1"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="2"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="3"/>
</LinearLayout>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="4"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="5"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="6"/>
</LinearLayout>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="7"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="8"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="9"/>
</LinearLayout>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="10"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="11"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="12"/>
</LinearLayout>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="13"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="14"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="15"/>
</LinearLayout>
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="3"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="16"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="17"/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="18"/>
</LinearLayout>
</LinearLayout>
回答2:
You should use chains like A binds to parent's start and start of following view. Then you set width of all the views equals to 0. You can make it with all rows.
Then, you can use aspect ratio to make width and height the same size.
来源：https://stackoverflow.com/questions/61477058/how-to-set-a-layout-width-percentage-of-one-third-on-constraintlayout