[英]ScrollView doesn't work properly
我有兩個XML布局文件,每個都有一個ScrollView作為父級。 當一個程序正常工作時,另一個程序卻不能工作(每個XML具有相同的層次結構)。
activity_login.xml
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<android.support.constraint.ConstraintLayout
android:id="@+id/login_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/tvLogo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/logo"
android:textSize="50sp"
app:layout_constraintBottom_toTopOf="@+id/guideline2"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.constraint.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.25" />
<TextView
android:id="@+id/tvRegisterLabel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginStart="3dp"
android:text="@string/btn_login"
android:textSize="20sp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toTopOf="@+id/guideline2" />
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/tvRegisterLabel">
<EditText
android:id="@+id/etEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/et_email_hint"
android:inputType="textEmailAddress"
android:maxLength="70"
android:maxLines="1"
android:minLines="1"
android:text="akarki@yahoo.com"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<android.support.constraint.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.15" />
<android.support.constraint.Guideline
android:id="@+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.85" />
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout7"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout2">
<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/et_password_hint"
android:inputType="textPassword"
android:maxLength="30"
android:maxLines="1"
android:minLines="1"
android:text="1234qwer"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:visibility="invisible"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout7" />
<Button
android:id="@+id/btnLogIn"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:background="@drawable/round_button"
android:text="@string/btn_login"
android:textColor="@color/colorWhite"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/progressBar" />
<com.facebook.login.widget.LoginButton
android:id="@+id/btnFacebook"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingBottom="15dp"
android:paddingLeft="15dp"
android:paddingTop="15dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/btnLogIn" />
<ImageButton
android:id="@+id/btnGoogle"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_marginTop="8dp"
android:background="@drawable/google_round_button"
android:scaleType="centerInside"
android:src="@drawable/google_button_background"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/btnFacebook" />
<TextView
android:id="@+id/tvRegister"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:maxLines="2"
android:text="@string/tv_create_account"
android:textAlignment="center"
android:textColor="@color/colorPrimaryDark"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/tvForgotPassword" />
<TextView
android:id="@+id/tvForgotPassword"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="@string/tv_forgot_password"
android:textAlignment="center"
android:textColor="@color/colorAccent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline3"
app:layout_constraintRight_toLeftOf="@+id/guideline6"
app:layout_constraintTop_toBottomOf="@+id/btnGoogle" />
</android.support.constraint.ConstraintLayout>
activity_register
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.25" />
<android.support.constraint.Guideline
android:id="@+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.15" />
<android.support.constraint.Guideline
android:id="@+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.85" />
<TextView
android:id="@+id/tvLogo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/logo"
android:textSize="50sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/tvRegisterLabel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="3dp"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_marginStart="3dp"
android:fontFamily="sans-serif"
android:text="@string/label_register"
android:textAllCaps="true"
android:textSize="20sp"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toTopOf="@+id/guideline" />
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/tvRegisterLabel">
<EditText
android:id="@+id/etEmailReg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:hint="@string/et_email_hint"
android:inputType="textEmailAddress"
android:maxLength="70"
android:maxLines="1"
android:minLines="1"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout3"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout">
<EditText
android:id="@+id/etNameReg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:hint="@string/et_name_hint"
android:inputType="textCapWords"
android:maxLength="30"
android:maxLines="1"
android:minLines="1"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout4"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout3">
<EditText
android:id="@+id/etPasswordReg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:hint="@string/et_password_hint"
android:inputType="textPassword"
android:maxLength="30"
android:maxLines="1"
android:minLines="1"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout5"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout4">
<EditText
android:id="@+id/etPasswordConfirmReg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:hint="@string/et_password_confirm_hint"
android:inputType="textPassword"
android:maxLength="30"
android:maxLines="1"
android:minLines="1"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/textInputLayout6"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout5">
<EditText
android:id="@+id/etPhoneNumber"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:hint="@string/et_phone_hint"
android:inputType="phone"
android:maxLength="13"
android:maxLines="1"
android:minLines="1"
android:textSize="@dimen/et_hint_size" />
</android.support.design.widget.TextInputLayout>
<TextView
android:id="@+id/tvRequired"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/label_required"
android:textAlignment="textStart"
android:textSize="12sp"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout6" />
<Button
android:id="@+id/btnRegister"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:background="@drawable/round_button"
android:text="@string/label_register"
android:textColor="@android:color/white"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/guideline4"
app:layout_constraintRight_toRightOf="@+id/guideline5"
app:layout_constraintTop_toBottomOf="@+id/tvRequired" />
</android.support.constraint.ConstraintLayout>
因此,為了澄清我的問題:在activity_login中 ,滾動視圖按預期正常工作。 而在activity_register滾動視圖不滾動至底部,我不知道為什么,因為我已經使用了相同的hierarcy作為activity_login。
我已經在SO中搜索了相同的問題,但是我沒有找到解決問題的方法。
任何幫助將不勝感激,我正在尋找解決方案的日子。
我不確定為什么會出現問題,但問題似乎出在您的《橫向Guideline
。 如果刪除Guideline
,刪除tvLogo
的引用,然后將tvRegisterLabel
對app:layout_constraintTop_toBottomOf="@+id/tvLogo"
的引用更改,則一切正常。
我懷疑這是因為您的布局中似乎有一套循環規則。 ConstraintLayout
的高度為wrap_content
,因此必須布局所有視圖才能知道它的大小。 要布置其視圖,必須布置tvLogo
。 要布置tvLogo
,必須布置guideline
。 要制定guideline
, ConstraintLayout
必須知道它有多高。 等等。
順便說一句,您似乎可以只用LinearLayout
替換此ConstraintLayout
。
抱歉,沒有什么好名聲可以添加評論,因此給出答案,
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
從activity_register
xml中的此代碼中刪除padding
,它將解決您的問題
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