Android布局与方形按钮

Question

我想做一个类似于这个的布局:

www.ImageBanana.net - layout.png http://www.imagebanana.com/img/9kmlhy66/thumb/layout.png

屏幕上有四个方形按钮 - 每个按钮使用屏幕的一半/屏幕高度(以较小者为准).与屏幕尺寸/分辨率无关.

我已经尝试通过使用a实现这一点,LinearLayout但按钮最终使用正确的宽度,但仍然具有背景的高度(不再是正方形).

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <Button 
            android:layout_height="wrap_content" 
            style="@style/CKMainButton"
            android:layout_width="fill_parent" 
            android:text="@string/sights"
            android:id="@+id/ApplicationMainSight" 
            android:layout_toLeftOf="@+id/ApplicationMainEvent"></Button>

        <Button 
            android:layout_height="wrap_content" 
            style="@style/CKMainButton"
            android:layout_width="fill_parent" 
            android:text="@string/sights"
            android:id="@+id/ApplicationMainSight" 
            android:layout_toLeftOf="@+id/ApplicationMainEvent"></Button>

    </LinearLayout>

    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <Button 
            android:layout_height="wrap_content" 
            style="@style/CKMainButton"
            android:layout_weight="1" 
            android:layout_width="fill_parent"
            android:text="@string/usergenerated" 
            android:id="@+id/ApplicationMainUserGenerated" />

        <Button 
            android:layout_height="wrap_content" 
            style="@style/CKMainButton"
            android:layout_weight="1" 
            android:layout_width="fill_parent"
            android:text="@string/tours" 
            android:id="@+id/ApplicationMainTour"/>

    </LinearLayout>
</LinearLayout>

它看起来像这样:www.ImageBanana.net - layout2.png http://www.imagebanana.com/img/i2ni6g4/thumb/layout2.png

我怎样才能使布局看起来像上面的图像？

Answer 1

import android.content.Context;
import android.util.AttributeSet;
import android.widget.LinearLayout;

public class SquareLayout extends LinearLayout {
    // Desired width-to-height ratio - 1.0 for square
    private final double mScale = 1.0;

    public SquareLayout(Context context) {
        super(context);
    }

    public SquareLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);

        if (width > (int)((mScale * height) + 0.5)) {
            width = (int)((mScale * height) + 0.5);
        } else {
            height = (int)((width / mScale) + 0.5);
        }

        super.onMeasure(
                MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)
        );
    }
}

Answer 2

您可以使用ConstraintLayout来实现此目的。您只需在 50% 屏幕宽度的位置添加垂直辅助线，将按钮与辅助线的左侧和右侧对齐，并将其调整为 1:1 的宽高比。一切都可以在布局 XML 文件中完成，无需额外的源代码。

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一旦您完成了所有这些步骤，您将得到如下结果：

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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"\n    xmlns:app="http://schemas.android.com/apk/res-auto"\n    android:layout_width="match_parent"\n    android:layout_height="match_parent">\n\n    <Button\n        android:id="@+id/button1"\n        android:layout_width="0dp"\n        android:layout_height="0dp"\n        android:background="@android:color/holo_orange_light"\n        android:text="1"\n        app:layout_constraintDimensionRatio="H,1:1"\n        app:layout_constraintEnd_toStartOf="@+id/guideline"\n        app:layout_constraintStart_toStartOf="parent"\n        app:layout_constraintTop_toTopOf="parent" />\n\n    <Button\n        android:id="@+id/button2"\n        android:layout_width="0dp"\n        android:layout_height="0dp"\n        android:background="@android:color/holo_blue_light"\n        android:text="2"\n        app:layout_constraintDimensionRatio="W,1:1"\n        app:layout_constraintEnd_toEndOf="parent"\n        app:layout_constraintStart_toEndOf="@+id/guideline"\n        app:layout_constraintTop_toTopOf="parent" />\n\n    <Button\n        android:id="@+id/button3"\n        android:layout_width="0dp"\n        android:layout_height="0dp"\n        android:background="@android:color/holo_green_dark"\n        android:text="3"\n        app:layout_constraintDimensionRatio="W,1:1"\n        app:layout_constraintEnd_toStartOf="@+id/guideline"\n        app:layout_constraintStart_toStartOf="parent"\n        app:layout_constraintTop_toBottomOf="@+id/button1" />\n\n    <Button\n        android:id="@+id/button4"\n        android:layout_width="0dp"\n        android:layout_height="0dp"\n        android:background="@android:color/holo_purple"\n        android:text="4"\n        app:layout_constraintDimensionRatio="W,1:1"\n        app:layout_constraintEnd_toEndOf="parent"\n        app:layout_constraintStart_toEndOf="@+id/guideline"\n        app:layout_constraintTop_toBottomOf="@+id/button2" />\n\n    <android.support.constraint.Guideline\n        android:id="@+id/guideline"\n        android:layout_width="wrap_content"\n        android:layout_height="wrap_content"\n        android:orientation="vertical"\n        app:layout_constraintGuide_percent="0.5" />\n\n</android.support.constraint.ConstraintLayout>\n

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以下是此布局在最小和最大屏幕上的外观：

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Answer 3

我的解决方案类似于第一个,但是,我在onLayout方法中进行了大小调整.不知道哪一个更好.

为方便起见,我将我的解决方案包装在一个不错的Android库中,请参阅https://github.com/ronaldsteen/Android-SquareLayout-Library