儿童的观点有相同的高度

Question

我有一个水平LinearLayout，里面有两个带文字的按钮。 LinearLayout＆layout_height按钮wrap_content为layout_height="match_parent" 。

两个按钮中的一个按钮的文字占用两行而不像其他按钮占用一行。

所以最后一个按钮的高度比另一个高，这是我不想要的。

我知道如何以编程方式解决此问题。所以我提出这个问题的原因是要知道我是否可以通过xml来解决这个问题。

一种可能的解决方案是，对于文本为一行的按钮，设置

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <Button
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/some_string" />

    <Button
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/some_other_string" />

</LinearLayout>

它工作正常。

但问题在于，通常我不知道哪个按钮会占据最大的高度。

本质上我想做的是：在里面有一个带有Views的LinearLayout 我想设置所有子视图的高度视图等于视图的高度，其中包含的内容何时具有最大高度。

问题是这是否可以通过xml？

示例XML。另外我忘了添加我已经有宽度为0dp。

cv::Ptr< cv::ml::ANN_MLP > nn = cv::ml::ANN_MLP::create();
nn->setActivationFunction(cv::ml::ANN_MLP::SIGMOID_SYM);
nn->setTrainMethod(cv::ml::ANN_MLP::BACKPROP);
nn->setBackpropMomentumScale(0.1);
nn->setBackpropWeightScale(0.1);
nn->setTermCriteria(cv::TermCriteria(cv::TermCriteria::MAX_ITER, (int)100000, 1e-6));

cv::Mat trainData(15, 4, CV_32FC1);
trainData.at<float>(0, 0) = 5.5f; trainData.at<float>(0, 1) = 3.5f; trainData.at<float>(0, 2) = 1.3f; trainData.at<float>(0, 3) = 0.2f;
trainData.at<float>(1, 0) = 6.5f; trainData.at<float>(1, 1) = 2.8f; trainData.at<float>(1, 2) = 4.5999999f; trainData.at<float>(1, 3) = 1.5f;
trainData.at<float>(2, 0) = 6.3000002f; trainData.at<float>(2, 1) = 2.3f; trainData.at<float>(2, 2) = 4.4000001f; trainData.at<float>(2, 3) = 1.3f;
trainData.at<float>(3, 0) = 6.0f; trainData.at<float>(3, 1) = 2.2f; trainData.at<float>(3, 2) = 4.0f; trainData.at<float>(3, 3) = 1.0f;
trainData.at<float>(4, 0) = 4.5999999f; trainData.at<float>(4, 1) = 3.0999999f; trainData.at<float>(4, 2) = 1.5f; trainData.at<float>(4, 3) = 0.2f;
trainData.at<float>(5, 0) = 5.0f; trainData.at<float>(5, 1) = 3.2f; trainData.at<float>(5, 2) = 1.2f; trainData.at<float>(5, 3) = 0.2f;
trainData.at<float>(6, 0) = 7.4000001f; trainData.at<float>(6, 1) = 2.8f; trainData.at<float>(6, 2) = 6.0999999f; trainData.at<float>(6, 3) = 1.9f;
trainData.at<float>(7, 0) = 6.0f; trainData.at<float>(7, 1) = 2.9000001f; trainData.at<float>(7, 2) = 4.5f; trainData.at<float>(7, 3) = 1.5f;
trainData.at<float>(8, 0) = 5.0f; trainData.at<float>(8, 1) = 3.4000001f; trainData.at<float>(8, 2) = 1.5f; trainData.at<float>(8, 3) = 0.2f;
trainData.at<float>(9, 0) = 6.4000001f; trainData.at<float>(9, 1) = 2.9000001f; trainData.at<float>(9, 2) = 4.3000002f; trainData.at<float>(9, 3) = 1.3f;
trainData.at<float>(10, 0) = 7.1999998f; trainData.at<float>(10, 1) = 3.5999999f; trainData.at<float>(10, 2) = 6.0999999f; trainData.at<float>(10, 3) = 2.5f;
trainData.at<float>(11, 0) = 5.0999999f; trainData.at<float>(11, 1) = 3.3f; trainData.at<float>(11, 2) = 1.7f; trainData.at<float>(11, 3) = 0.5f;
trainData.at<float>(12, 0) = 7.1999998f; trainData.at<float>(12, 1) = 3.0f; trainData.at<float>(12, 2) = 5.8000002f; trainData.at<float>(12, 3) = 1.6f;
trainData.at<float>(13, 0) = 6.0999999f; trainData.at<float>(13, 1) = 2.8f; trainData.at<float>(13, 2) = 4.0f; trainData.at<float>(13, 3) = 1.3f;
trainData.at<float>(14, 0) = 5.8000002f; trainData.at<float>(14, 1) = 2.7f; trainData.at<float>(14, 2) = 4.0999999f; trainData.at<float>(14, 3) = 1.0f;

cv::Mat trainLabels(15, 1, CV_32FC1);
trainLabels.at<float>(0, 0) = 0; trainLabels.at<float>(1, 0) = 0;
trainLabels.at<float>(2, 0) = 0; trainLabels.at<float>(3, 0) = 0;
trainLabels.at<float>(4, 0) = 0; trainLabels.at<float>(5, 0) = 0;
trainLabels.at<float>(6, 0) = 1; trainLabels.at<float>(7, 0) = 0;
trainLabels.at<float>(8, 0) = 0; trainLabels.at<float>(9, 0) = 0;
trainLabels.at<float>(10, 0) = 1; trainLabels.at<float>(11, 0) = 0;
trainLabels.at<float>(12, 0) = 1; trainLabels.at<float>(13, 0) = 0; trainLabels.at<float>(14, 0) = 0;

cv::Mat layers = cv::Mat(3, 1, CV_32SC1);
layers.row(0) = cv::Scalar(trainData.cols);
layers.row(1) = cv::Scalar(4);
layers.row(2) = cv::Scalar(1);
nn->setLayerSizes(layers);
nn->train(trainData, cv::ml::SampleTypes::ROW_SAMPLE, trainLabels);

cv::Mat out;
nn->predict(trainData.row(6), out);

for (int y = 0; y< out.cols; y++) {
    std::cout << out.row(0).col(y) << ",";
}

std::cout << std::endl;

Answer 1

我猜你搜索的内容是android:baselineAligned="false"，这样可以避免文本位于同一基线上，按钮将从屏幕上相同的y位置开始。

此处没有android:baselineAligned="false"：

这里有：

但是，如果您还希望两个按钮的大小相同，请尝试以下布局示例：

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:baselineAligned="false">

    <Button
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="aaaaa"/>

    <Button
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="bbbbbbb bbbbbbbb bbbbbbbb bbbbbbbbbbbb bbbbbb"/>

</LinearLayout>

这将是这样的：

Answer 2

使用此东西设置称重和重量布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="10"
    android:orientation="horizontal" >

    <Button
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="Button 1" />

    <Button
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="Button 2" />
    </LinearLayout>

    </LinearLayout>