我的应用程序中有一些ImageView。它们在我的手机上显示得很好但是没有办法在模拟器上显示它们。我已经尝试过不同版本和屏幕尺寸。在另一个问题中，人们可以使用android:hardwareAccelerated="false"或使用src而不是srcCompat来解决问题，但这似乎没什么帮助。
imageViews所在的ConstraintLayout：
<android.support.constraint.ConstraintLayout
android:id="@+id/login_header"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageView
android:id="@+id/title_background_log"
android:layout_width="0dp"
android:layout_height="100dp"
android:background="@color/colorPrimary"
android:elevation="10dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@color/colorPrimary" />
<ImageView
android:id="@+id/company_logo"
android:layout_width="331dp"
android:layout_height="90dp"
android:layout_marginEnd="39dp"
android:layout_marginLeft="39dp"
android:layout_marginRight="39dp"
android:layout_marginStart="39dp"
android:elevation="15dp"
android:scaleType="fitXY"
android:src="@drawable/zeeromed_text"
android:visibility="visible"
app:layout_constraintHorizontal_bias="0.489"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="ContentDescription"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
</android.support.constraint.ConstraintLayout>
完整的活动布局：
<android.support.constraint.ConstraintLayout
android:id="@+id/login_header"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageView
android:id="@+id/title_background_log"
android:layout_width="0dp"
android:layout_height="100dp"
android:background="@color/colorPrimary"
android:elevation="10dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@color/colorPrimary" />
<ImageView
android:id="@+id/company_logo"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginEnd="39dp"
android:layout_marginLeft="39dp"
android:layout_marginRight="39dp"
android:layout_marginStart="39dp"
android:elevation="15dp"
android:scaleType="center"
android:visibility="visible"
app:layout_constraintHorizontal_bias="0.489"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="ContentDescription"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
</android.support.constraint.ConstraintLayout>
<android.support.constraint.ConstraintLayout
android:id="@+id/login_body"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="0dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
android:layout_marginTop="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/login_header">
<EditText
android:id="@+id/email_editText"
style="@android:style/Widget.EditText"
android:layout_width="0dp"
android:layout_height="45dp"
android:layout_marginEnd="30dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginStart="30dp"
android:layout_marginTop="136dp"
android:background="@drawable/rounded_transparent_button_focusable"
android:ems="10"
android:hint="@string/email_hint"
android:inputType="textEmailAddress"
android:paddingLeft="10dp"
android:selectAllOnFocus="false"
android:textAlignment="viewStart"
android:textColor="@color/colorPrimary_text"
android:textColorHint="@color/colorSecondary_text"
android:textSize="18sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:layout_marginStart="16dp"
android:layout_marginTop="37dp"
android:text="oppure"
android:textAlignment="center"
android:textColor="@color/colorPrimary_text"
android:textSize="14sp"
app:layout_constraintHorizontal_bias="0.486"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/send_button"
tools:ignore="HardcodedText,RtlHardcoded" />
<ImageView
android:id="@+id/imageView7"
android:layout_width="0dp"
android:layout_height="100dp"
android:background="@color/colorAccent"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<br.com.simplepass.loading_button_lib.customViews.CircularProgressButton
android:id="@+id/send_button"
style="@android:style/Widget.Material.Button"
android:layout_width="300dp"
android:layout_height="48dp"
android:layout_marginBottom="81dp"
android:layout_marginEnd="32dp"
android:layout_marginLeft="32dp"
android:layout_marginRight="32dp"
android:layout_marginStart="32dp"
android:background="@color/colorPrimary"
android:elevation="10dp"
android:text="accedi"
android:textColor="@color/white"
android:textSize="18sp"
app:layout_constraintBottom_toTopOf="@+id/sing_in"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:spinning_bar_color="#FFFFFF"
app:spinning_bar_width="4dp"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<Button
android:id="@+id/security_button"
style="@style/Widget.AppCompat.Button.Borderless"
android:layout_width="65dp"
android:layout_height="60dp"
android:layout_marginBottom="29dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="8dp"
android:layout_marginStart="15dp"
android:background="@drawable/hexagon_lock"
android:backgroundTint="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.055"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:ignore="RtlHardcoded" />
<Button
android:id="@+id/login_intro_button"
style="@style/Widget.AppCompat.Button.Borderless"
android:layout_width="197dp"
android:layout_height="48dp"
android:layout_marginBottom="89dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:text="Ripeti introduzione"
android:textColor="@color/colorPrimary_text"
android:textSize="12sp"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/sing_in"
style="@android:style/Widget.DeviceDefault.Button.Borderless"
android:layout_width="300dp"
android:layout_height="48dp"
android:layout_marginBottom="122dp"
android:layout_marginEnd="15dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginStart="15dp"
android:text="@string/registration_link"
android:textAppearance="@android:style/TextAppearance.Material.Body2"
android:textSize="18sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<TextView
android:id="@+id/security_text"
android:layout_width="65dp"
android:layout_height="15dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="Sicurezza"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.432"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/innovation_text"
tools:ignore="HardcodedText,RtlHardcoded" />
<TextView
android:id="@+id/innovation_text"
android:layout_width="65dp"
android:layout_height="15dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:layout_marginStart="16dp"
android:text="Innovazione"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.487"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:ignore="HardcodedText,RtlHardcoded"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintTop_creator="1" />
<Button
android:id="@+id/innovation_button"
style="@style/Widget.AppCompat.Button.Borderless"
android:layout_width="65dp"
android:layout_height="60dp"
android:layout_marginBottom="29dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="8dp"
android:layout_marginStart="15dp"
android:background="@drawable/hexagon_cloud"
android:backgroundTint="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.488"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:ignore="RtlHardcoded" />
<EditText
android:id="@+id/password_editText"
style="@android:style/Widget.EditText"
android:layout_width="0dp"
android:layout_height="45dp"
android:layout_marginBottom="302dp"
android:layout_marginEnd="30dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginStart="30dp"
android:layout_marginTop="8dp"
android:background="@drawable/rounded_transparent_button_focusable"
android:ems="10"
android:hint="@string/password_hint"
android:inputType="textPassword"
android:paddingLeft="10dp"
android:selectAllOnFocus="false"
android:textAlignment="viewStart"
android:textColor="@color/colorPrimary_text"
android:textColorHint="@color/colorSecondary_text"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/email_editText"
app:layout_constraintVertical_bias="0.414"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
</android.support.constraint.ConstraintLayout>
我不认为我的布局结构是问题，但也许你可能证明我错了。 图片显示在API 24 Nougat 7.0手机上。 我尝试了从API 21到23的模拟器，因为我的最小API是21。
答案 0 :(得分：0)
我真的不知道为什么scr无法正常工作，但是您可以尝试：
android:background="@drawable/zeeromed_text"
代替 ：
android:src="@drawable/zeeromed_text"或scrCompact
不要像在第一个background
src和ImageView那样做多个
答案 1 :(得分：0)
这样更改
for (index, value) in controlArr.enumerated() {
print("\(index): \(value)")
let yPosition : Int = index+1
DispatchQueue.main.async {
let categoryField = UITextField(frame: CGRect(x: 15, y: 84*yPosition+35, width: Int(self.view.frame.width - 35), height: 40))
// categoryField.placeholder = "Please Enter \(value)"
categoryField.font = UIFont.systemFont(ofSize: 15)
categoryField.text = "\(self.fieldArr[index])"
categoryField.delegate = self
categoryField.tag = 100 + index
// self.myDict["myTextfield\(index)"] = categoryField
categoryField.borderStyle = UITextBorderStyle.bezel
categoryField.autocorrectionType = UITextAutocorrectionType.no
categoryField.keyboardType = UIKeyboardType.default
categoryField.returnKeyType = UIReturnKeyType.done
categoryField.clearButtonMode = UITextFieldViewMode.whileEditing;
categoryField.contentVerticalAlignment = UIControlContentVerticalAlignment.center
self.arrayOfTextFields.append(categoryField)
self.scrollView.addSubview(categoryField)
for item in self.controlArr {
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 20))
if item == "dropdown"
{
categoryField.rightViewMode = UITextFieldViewMode.always
imageView.contentMode = .scaleAspectFit
let image = UIImage(named:"down.png")
imageView.image = image
categoryField.rightView = imageView
}else{
imageView.isHidden = true
}
}
}
希望这可能对您有帮助