Question

我正在非常努力地理解ScrollView和Linearlayout，并不断尝试在我的活动中使用它，但是我遇到了此错误。.我已经只有一个Linearlyout滚动视图内部，并且其他子项都包裹在包裹内容中和宽度，但应用仍然崩溃。.请帮助

import asyncio
from proxybroker import Broker


def get_random_proxy():
    """
    Get random proxy from 'proxies.txt'.
    """
    lines = open('proxies.txt').read().splitlines()
    rproxy =random.choice(lines)
    PROXY =  rproxy


async def save(proxies, filename):
    """
    Save proxies to a file.
    """
    with open(filename, 'w') as file:
        while True:
            proxy = await proxies.get()
            if proxy is None:
                break
            # Check accurately if the proxy is working.
            if proxy.is_working:
                protocol = 'https' if 'HTTPS' in proxy.types else 'http'
                line = '{protocol}://{proxy.host}:{proxy.port}\n'
                file.write(line)


def main():
    proxies = asyncio.Queue()
    broker = Broker(proxies)
    tasks = asyncio.gather(broker.find(types=['HTTP', 'HTTPS'], limit=5),
                           save(proxies, filename='proxies.txt'))
    loop = asyncio.get_event_loop()
    loop.run_until_complete(tasks)


if __name__ == '__main__':
    main()

谢谢。

Answer 1

像这样，在ScrollView中只需要一个孩子即可。

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

    <ImageView ... />
    <TextView ... />
    <TextView ... />
    <TextView ... />

</LinearLayout>
</ScrollView>

Answer 2

否，您在LinearLayout中有一个SrollView。您的ScrollView中只有一堆TextView。更改为此：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="#ffffff"
        tools:context=".Blood">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="56dp"
        android:textStyle="bold"
        android:background="#f4051d"
        android:textAlignment="center"
        android:textColor="#ffffff"
        android:gravity="center"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Blood Type: Facts and Information"/>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="#ffffff"
        android:padding="5dp">

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

            <TextView
                android:id="@+id/intro"
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#000000"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="When "/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Blood Types ( Groups )"/>

            <TextView
                android:id="@+id/blood_types"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="A blood "
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <ImageView
                android:id="@+id/image_one"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/drawable_blood_one"/>

            <TextView
                android:id="@+id/blood_type_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="In addition ."
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Donating Blood By Compatible Type"/>

            <TextView
                android:id="@+id/donate"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="Blood "
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <ImageView
                android:id="@+id/image_two"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/drawable_blood_two"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Finding Out Your  Blood Type"/>

            <TextView
                android:id="@+id/find_blood_type"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="It is easy "
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <ImageView
                android:id="@+id/image_three"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/drawable_blood_three"/>

            <TextView
                android:id="@+id/find_blood_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="In most"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="What Does Blood Group RH Factor Mean"/>

            <TextView
                android:id="@+id/rh_factor"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="RH factor ."
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="What is the Rarest Blood Type"/>

            <TextView
                android:id="@+id/rare_blood"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="According "
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Blood Type Diet"/>

            <TextView
                android:id="@+id/blood_type_diet"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text=" The Ea"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Blood Types and Personality"/>

            <TextView
                android:id="@+id/personality"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="Legend"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_marginTop="15dp"
                android:layout_height="wrap_content"
                android:textStyle="bold"
                android:textColor="#0e06f2"
                android:fontFamily="sans-serif-condensed"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Facts: Blood Types"/>

            <TextView
                android:id="@+id/facts"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="15dp"
                android:fontFamily="sans-serif-condensed"
                android:text="Blood"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#000000"
                android:textStyle="bold" />

        </LinearLayout>

    </ScrollView>
</LinearLayout>

.IllegalStateException：ScrollView只能托管一个直接子级

2 个答案: