<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:stretchColumns="*"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:gravity="right"
        android:background="#f0f0f0"
        android:layout_width="1"
        android:layout_height="40dp"
        android:text="90"
        android:id="@+id/textView" />
    
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="7"
            android:id="@+id/button1" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="8"
            android:id="@+id/button2" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="9"
            android:id="@+id/button3" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="/"
            android:id="@+id/button4" />
    </TableRow>
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="4"
            android:id="@+id/button5" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="5"
            android:id="@+id/button6" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="6"
            android:id="@+id/button7" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="*"
            android:id="@+id/button8" />
    </TableRow>
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="1"
            android:id="@+id/button9" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="2"
            android:id="@+id/button10" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="3"
            android:id="@+id/button11" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="-"
            android:id="@+id/button12" />
    </TableRow>
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="0"
            android:id="@+id/button13" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="."
            android:id="@+id/button14" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="+"
            android:id="@+id/button15" />
        <Button
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="="
            android:id="@+id/button16" />
    </TableRow>
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:layout_span="4"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="clear"
            android:id="@+id/button17" />
    </TableRow>
</TableLayout>

我的代码是这样的，但是显示只有屏幕一半大小。怎么添加让这些充满呢？

我使用weight=“1”，然而没用