在 Java 中更改宽度和高度时,约束布局中的视图移动到顶部
View in Constraint Layout moves to top on changing width and height in Java
当我在 java(约束布局)中修改按钮的宽度和高度时,单击时按钮会自动移动到顶部。请检查下面的代码,让我知道问题出在哪里。 PS - 我是约束布局的新手
布局文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ImageButton
android:id="@+id/ibEgg"
android:layout_width="250dp"
android:layout_height="350dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@null"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/egg" />
</android.support.constraint.ConstraintLayout>
Java代码
ibEgg.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(250,350);
ibEgg.setLayoutParams(layoutParams);
return true; // if you want to handle the touch event
case MotionEvent.ACTION_UP:
ConstraintLayout.LayoutParams layoutParams1 = new ConstraintLayout.LayoutParams(300,400);
ibEgg.setLayoutParams(layoutParams1);
return true; // if you want to handle the touch event
}
return false;
}
});
您正在创建新的 LayoutParams,因此您需要以编程方式设置约束,方法如下:
ibEgg.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(250, 350);
layoutParams.topToTop = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.bottomToBottom = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.startToStart = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.endToEnd = ConstraintLayout.LayoutParams.PARENT_ID;
ibEgg.setLayoutParams(layoutParams);
return true; // if you want to handle the touch event
case MotionEvent.ACTION_UP:
ConstraintLayout.LayoutParams layoutParams1 = new ConstraintLayout.LayoutParams(300, 400);
layoutParams1.topToTop = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.bottomToBottom = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.startToStart = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.endToEnd = ConstraintLayout.LayoutParams.PARENT_ID;
ibEgg.setLayoutParams(layoutParams1);
return true; // if you want to handle the touch event
}
return false;
}
});
当我在 java(约束布局)中修改按钮的宽度和高度时,单击时按钮会自动移动到顶部。请检查下面的代码,让我知道问题出在哪里。 PS - 我是约束布局的新手
布局文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ImageButton
android:id="@+id/ibEgg"
android:layout_width="250dp"
android:layout_height="350dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@null"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/egg" />
</android.support.constraint.ConstraintLayout>
Java代码
ibEgg.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(250,350);
ibEgg.setLayoutParams(layoutParams);
return true; // if you want to handle the touch event
case MotionEvent.ACTION_UP:
ConstraintLayout.LayoutParams layoutParams1 = new ConstraintLayout.LayoutParams(300,400);
ibEgg.setLayoutParams(layoutParams1);
return true; // if you want to handle the touch event
}
return false;
}
});
您正在创建新的 LayoutParams,因此您需要以编程方式设置约束,方法如下:
ibEgg.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(250, 350);
layoutParams.topToTop = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.bottomToBottom = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.startToStart = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams.endToEnd = ConstraintLayout.LayoutParams.PARENT_ID;
ibEgg.setLayoutParams(layoutParams);
return true; // if you want to handle the touch event
case MotionEvent.ACTION_UP:
ConstraintLayout.LayoutParams layoutParams1 = new ConstraintLayout.LayoutParams(300, 400);
layoutParams1.topToTop = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.bottomToBottom = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.startToStart = ConstraintLayout.LayoutParams.PARENT_ID;
layoutParams1.endToEnd = ConstraintLayout.LayoutParams.PARENT_ID;
ibEgg.setLayoutParams(layoutParams1);
return true; // if you want to handle the touch event
}
return false;
}
});