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问为什么当使用WindowCompat.setDecorFitsSystemWindows(window，false时滚动不能正常工作)？
EN

Stack Overflow用户

提问于 2022-06-28 07:10:26

回答 1查看 157关注 0票数 0

看上去就像当我加上

WindowCompat.setDecorFitsSystemWindows(window, false)

对于我的Android应用程序来说，当键盘打开时，滚动屏幕上的内容就会被破坏。它不允许您滚动到屏幕上的最后一项。这是我正在使用的代码。

package com.example.myapplication

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.WindowCompat
import com.example.myapplication.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        WindowCompat.setDecorFitsSystemWindows(window, false)
        super.onCreate(savedInstanceState)

        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

    }

}

<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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/scrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/containerOfContainers"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clipChildren="false"
        android:clipToPadding="false"
        android:orientation="vertical">

        <TextView
            android:id="@+id/titleText"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:gravity="center_horizontal"
            android:text="Title"
            android:textSize="40sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:layout_constraintTop_creator="1"
            tools:layout_editor_absoluteX="@dimen/spark_gap_tiny">

            <requestFocus />
        </TextView>

        <EditText
            android:id="@+id/first"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/titleText" />


        <EditText
            android:id="@+id/second"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="2"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/first" />

        <EditText
            android:id="@+id/third"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="3"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/second" />

        <EditText
            android:id="@+id/fourth"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="4"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/third" />

        <EditText
            android:id="@+id/fifth"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="5"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/fourth" />

        <EditText
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:paddingTop="150dp"
            android:text="6"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/fifth" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.myapplication">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyApplication"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:theme="@style/Theme.MyApplication">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

正确(当键盘打开时，我可以一直滚动到6)

错误(我只能在打开键盘时滚动到4)

是什么导致了这一切？这似乎是一个非常简单的用例。

android

android-constraintlayout

android-scrollview

material-components-android

回答 1

Stack Overflow用户

回答已采纳

发布于 2022-06-28 08:10:02

弄明白了。我需要在它们改变的时候更新它们。见代码。

package com.example.myapplication

import android.os.Bundle
import android.view.View
import android.view.ViewGroup
import android.view.WindowInsets
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.WindowCompat
import androidx.core.view.updateLayoutParams
import androidx.core.view.updateMargins
import com.example.myapplication.databinding.ActivityMainBinding


class MainActivity : AppCompatActivity() {

    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        WindowCompat.setDecorFitsSystemWindows(window, false)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)


        binding.root.setOnApplyWindowInsetsListener { _, _ ->
            applyKeyboardInsets(binding.root)
        }

    }


    private fun applyKeyboardInsets(root: View): WindowInsets {

        val insets = root.rootWindowInsets.getInsets(WindowInsets.Type.ime())
        root.updateLayoutParams<ViewGroup.MarginLayoutParams> {
            updateMargins(insets.left, insets.top, insets.right, insets.bottom)
        }
        return WindowInsets.Builder()
            .setInsets(WindowInsets.Type.ime(), insets)
            .build()
    }

}