Android 工作室未正确绘制按钮，下移

Question

在我的 Android 工作室项目中，我有一个带有约束布局的片段。这里是 XML.

        <android.support.constraint.ConstraintLayout
            android:id="@+id/pinLayout"
            android:layout_width="match_parent"
            android:layout_height="250dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/topLayout">

            <android.support.constraint.ConstraintLayout
                android:layout_width="0dp"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@+id/constraintLayout"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                tools:visibility="visible">

                <TextView
                    android:id="@+id/numberTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="8dp"
                    android:gravity="top"
                    android:text="00000000"
                    android:textColor="@color/appTintColor"
                    android:textSize="18sp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />
            </android.support.constraint.ConstraintLayout>

            <android.support.constraint.ConstraintLayout
                android:id="@+id/constraintLayout2"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHeight_percent="0.4"
                app:layout_constraintStart_toStartOf="parent">

                <Button
                    android:id="@+id/confirmButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@drawable/rounded_corner_shape_tint"
                    android:paddingLeft="16dp"
                    android:paddingRight="16dp"
                    android:text="Confirm Pin"
                    android:textColor="@color/appMainColor"
                    android:textSize="14sp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />
            </android.support.constraint.ConstraintLayout>

            <android.support.constraint.ConstraintLayout
                android:id="@+id/constraintLayout"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@+id/constraintLayout2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHeight_percent="0.4"
                app:layout_constraintStart_toStartOf="parent">

                <LinearLayout
                    android:layout_width="0dp"
                    android:layout_height="0dp"
                    android:orientation="horizontal"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent">

                    <TextView
                        android:id="@+id/pinView1"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView2"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView3"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView4"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />
                </LinearLayout>
            </android.support.constraint.ConstraintLayout>

        </android.support.constraint.ConstraintLayout>

如您所见，确认按钮在他的父项中以约束为中心。

但是当我在 Xperia z5 compact 中运行应用程序时，布局检查器显示按钮未居中。

为什么会发生这种情况以及如何解决？

注意如果我删除 numberTextView 及其父 constarintLayout，问题就会消失。注意在我的代码中，我以编程方式将文本设置为 numberTextView。如果我评论该代码，即不以编程方式设置文本，按钮将正确绘制。

这是代码部分，我将文本设置为 NumberTextView

private void performInitialLayout() {
    fragmentViewHeight = fragmentView.getHeight();

    ViewRelatedUtils.setHeightPercentage(topView, scrollView, 0.3);
    ViewRelatedUtils.setHeightPercentage(pinLayout, scrollView, 0.4);

    // here I am setting a text.
    numberTextView.setText(number);

    if (isProcessingPinConfirmation) showProcessing(); else hideProcessing();

    wrapperView.requestFocus();

    performedInitialLayout = true;
}

Answer 1

请阅读我对问题的评论，尽管我对您的布局做了一些更改，请检查一下

根据您的要求更改颜色。

    <?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:id="@+id/linearLayout17"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/hint_color">


    <android.support.constraint.ConstraintLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/constraintLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:visibility="visible">

        <TextView
            android:id="@+id/numberTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:gravity="top"
            android:text="00000000"
            android:textColor="@color/txt_color"
            android:textSize="18sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/constraintLayout2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.4"
        app:layout_constraintStart_toStartOf="parent">

        <Button
            android:id="@+id/confirmButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/bg_rounded_button"
            android:padding="14dp"
            android:text="Confirm Pin"
            android:textColor="@color/colorPrimary"
            android:textSize="14sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/constraintLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/constraintLayout2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.4"
        app:layout_constraintStart_toStartOf="parent">

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:orientation="horizontal"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <TextView
                android:id="@+id/pinView1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="0.25"
                android:gravity="center"
                android:text="-"
                android:textColor="@color/txt_color"
                android:textSize="36sp" />

            <TextView
                android:id="@+id/pinView2"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="0.25"
                android:gravity="center"
                android:text="-"
                android:textColor="@color/txt_color"
                android:textSize="36sp" />

            <TextView
                android:id="@+id/pinView3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="0.25"
                android:gravity="center"
                android:text="-"
                android:textColor="@color/txt_color"
                android:textSize="36sp" />

            <TextView
                android:id="@+id/pinView4"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="0.25"
                android:gravity="center"
                android:text="-"
                android:textColor="@color/txt_color"
                android:textSize="36sp" />
        </LinearLayout>
    </android.support.constraint.ConstraintLayout>

</android.support.constraint.ConstraintLayout>

Android 工作室未正确绘制按钮，下移

Android studio doesn't draw button correctly, shifts down

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