Android LinearLayout layout_weight 行为
Android LinearLayout layout_weight behavior
我需要安排 4 列视图，其中第一列占整个高度。其他 3 个包含 2 个垂直放置的视图。我想到了使用由第一个视图和 3 个嵌套的垂直 LinearLayouts 组成的父级水平 LinearLayout。
现在我需要将最后两列的大小设为前两列的一半。所以我使用 layout_weight 并将它的后两个设置为 1，前两个设置为 2。然而，这会导致最后两列占据整个 space.
我想这一定与其余的布局设置有关，但由于我没有经验，我不能完全理解它。希望你们中的一个能帮助我。
这是xml：
<LinearLayout
android:layout_width="400dp"
android:layout_height="100dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@id/table_playfield"
app:layout_constraintTop_toBottomOf="@id/table_tile2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" >
<com.example.se2_gruppenphase_ss21.game.TimerView
android:id="@+id/timerView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2" >
<Button
android:id="@+id/remove"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="@string/remove_tile"
app:backgroundTint="#2196F3" />
<Button
android:id="@+id/ubongo_button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:fontFamily="@font/architects_daughter"
android:text="UBONGO !!"
android:textSize="16sp"
android:textStyle="bold"
app:backgroundTint="#FF1010" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1" >
<Button
android:id="@+id/mirror_vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_vertical"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_left"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_left"
app:backgroundTint="#3F51B5" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1">
<Button
android:id="@+id/mirror_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_horizontal"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_right"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_right"
app:backgroundTint="#3F51B5" />
</LinearLayout>
</LinearLayout>
Indicates how much of the extra space in the LinearLayout is allocated
to the view associated with these LayoutParams. Specify 0 if the view
should not be stretched. Otherwise the extra pixels will be pro-rated
among all views whose weight is greater than 0
要创建线性布局，其中每个 child 在屏幕上使用相同数量的 space，请设置 android:layout_height每个视图的 到 "0dp"（对于垂直布局）或每个视图的 android:layout_width 到 "0dp"（对于水平布局）。
<LinearLayout
android:layout_width="400dp"
android:layout_height="100dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@id/table_playfield"
app:layout_constraintTop_toBottomOf="@id/table_tile2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:weightSum="6"
>
<com.example.se2_gruppenphase_ss21.game.TimerView
android:id="@+id/timerView2"
android:layout_width=“0dp”
android:layout_height="match_parent"
android:layout_weight="2" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2" >
<Button
android:id="@+id/remove"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="@string/remove_tile"
app:backgroundTint="#2196F3" />
<Button
android:id="@+id/ubongo_button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:fontFamily="@font/architects_daughter"
android:text="UBONGO !!"
android:textSize="16sp"
android:textStyle="bold"
app:backgroundTint="#FF1010" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1" >
<Button
android:id="@+id/mirror_vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_vertical"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_left"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_left"
app:backgroundTint="#3F51B5" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1">
<Button
android:id="@+id/mirror_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_horizontal"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_right"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_right"
app:backgroundTint="#3F51B5" />
</LinearLayout>
</LinearLayout>
仅供参考
如果用android:weightSum就更好了。
Defines the maximum weight sum. If unspecified, the sum is computed by
adding the layout_weight of all of the children. This can be used for
instance to give a single child 50% of the total available space by
giving it a layout_weight of 0.5 and setting the weightSum to 1.0.
我需要安排 4 列视图，其中第一列占整个高度。其他 3 个包含 2 个垂直放置的视图。我想到了使用由第一个视图和 3 个嵌套的垂直 LinearLayouts 组成的父级水平 LinearLayout。
现在我需要将最后两列的大小设为前两列的一半。所以我使用 layout_weight 并将它的后两个设置为 1，前两个设置为 2。然而，这会导致最后两列占据整个 space.
我想这一定与其余的布局设置有关，但由于我没有经验，我不能完全理解它。希望你们中的一个能帮助我。
这是xml：
<LinearLayout
android:layout_width="400dp"
android:layout_height="100dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@id/table_playfield"
app:layout_constraintTop_toBottomOf="@id/table_tile2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" >
<com.example.se2_gruppenphase_ss21.game.TimerView
android:id="@+id/timerView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2" >
<Button
android:id="@+id/remove"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="@string/remove_tile"
app:backgroundTint="#2196F3" />
<Button
android:id="@+id/ubongo_button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:fontFamily="@font/architects_daughter"
android:text="UBONGO !!"
android:textSize="16sp"
android:textStyle="bold"
app:backgroundTint="#FF1010" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1" >
<Button
android:id="@+id/mirror_vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_vertical"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_left"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_left"
app:backgroundTint="#3F51B5" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1">
<Button
android:id="@+id/mirror_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_horizontal"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_right"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_right"
app:backgroundTint="#3F51B5" />
</LinearLayout>
</LinearLayout>
Indicates how much of the extra space in the LinearLayout is allocated to the view associated with these LayoutParams. Specify 0 if the view should not be stretched. Otherwise the extra pixels will be pro-rated among all views whose weight is greater than 0
要创建线性布局，其中每个 child 在屏幕上使用相同数量的 space，请设置 android:layout_height每个视图的 到 "0dp"（对于垂直布局）或每个视图的 android:layout_width 到 "0dp"（对于水平布局）。
<LinearLayout
android:layout_width="400dp"
android:layout_height="100dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@id/table_playfield"
app:layout_constraintTop_toBottomOf="@id/table_tile2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:weightSum="6"
>
<com.example.se2_gruppenphase_ss21.game.TimerView
android:id="@+id/timerView2"
android:layout_width=“0dp”
android:layout_height="match_parent"
android:layout_weight="2" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2" >
<Button
android:id="@+id/remove"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="@string/remove_tile"
app:backgroundTint="#2196F3" />
<Button
android:id="@+id/ubongo_button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:fontFamily="@font/architects_daughter"
android:text="UBONGO !!"
android:textSize="16sp"
android:textStyle="bold"
app:backgroundTint="#FF1010" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1" >
<Button
android:id="@+id/mirror_vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_vertical"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_left"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_left"
app:backgroundTint="#3F51B5" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1">
<Button
android:id="@+id/mirror_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/mirror_horizontal"
app:backgroundTint="#3F51B5" />
<Button
android:id="@+id/rotate_right"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@drawable/rotate_right"
app:backgroundTint="#3F51B5" />
</LinearLayout>
</LinearLayout>
仅供参考
如果用android:weightSum就更好了。
Defines the maximum weight sum. If unspecified, the sum is computed by adding the layout_weight of all of the children. This can be used for instance to give a single child 50% of the total available space by giving it a layout_weight of 0.5 and setting the weightSum to 1.0.