移动 RelativeLayout 时 ImageView 的大小略有增加 (Android)

Question

我遇到了一个烦人的问题，当我移动我的 RelativeLayout 时，其中的 ImageView 会增加尺寸以填满整个屏幕的宽度。我用彩色背景替换了图片，这样更容易看清。

别介意它的样子，布局是W.I.P

GIF这里显示问题：https://gyazo.com/ae31b8e70e4f96fe89ba041549db22bb

下面是我的 OnTouchListener 的代码

private View.OnTouchListener relativeListener = new View.OnTouchListener()
{
    @Override
    public boolean onTouch(View view, MotionEvent event)
    {
        final int X = (int) event.getRawX();
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN:
                LinearLayout.LayoutParams lParams = (LinearLayout.LayoutParams) view.getLayoutParams();
                _xDelta = X - lParams.leftMargin;
                break;
            case MotionEvent.ACTION_UP:
                break;
            case MotionEvent.ACTION_POINTER_DOWN:
                break;
            case MotionEvent.ACTION_POINTER_UP:
                break;
            case MotionEvent.ACTION_MOVE:
                LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) view.getLayoutParams();
                layoutParams.leftMargin = (X - _xDelta);
                layoutParams.rightMargin = -(X - _xDelta);
                view.setLayoutParams(layoutParams);
                break;
        }
        _root.invalidate();
        return true;
    }
};

下面是定义ImageView和RelativeLayout的xml

<LinearLayout 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/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="me.tech.myapp.Fragments.HomeFragment">
<TextView
    android:id="@+id/tvCurrentTheme"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_margin="16dp"
    android:text="StringCurrentTheme"
    android:textAlignment="center"
    android:textSize="18sp" />

<RelativeLayout
    android:id="@+id/relativeRoot"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp">

    <ImageView
        android:id="@+id/ivMainImage"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:contentDescription="Foto jonguh"
        android:cropToPadding="false"
        android:scaleType="centerCrop"
        app:srcCompat="@android:color/holo_blue_bright" />

    <Button
        android:id="@+id/btnReportImage"
        android:layout_width="32dp"
        android:layout_height="32dp"
        android:layout_alignParentEnd="true"
        android:layout_alignParentTop="true"
        android:layout_alignTop="@+id/ivMainImage"
        android:layout_margin="16dp"
        android:background="@drawable/ic_menu_send"
        android:visibility="visible" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fabSendImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/btnReportImage"
        android:layout_alignParentBottom="true"
        android:layout_marginEnd="17dp"
        android:clickable="true"
        app:backgroundTint="@android:color/holo_orange_dark"
        app:elevation="4dp"
        app:fabSize="normal"
        app:srcCompat="@drawable/ic_menu_camera" />

</RelativeLayout>
</LinearLayout>

Answer 1

android:scaleType="fitCenter" 
android:adjustViewBounds="true"

尝试将这些添加到 ImageView 的属性中

Answer 2

ImageView占据整个布局是正常的

<ImageView
        android:id="@+id/ivMainImage"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
....

尝试 wrap_content 而不是 match_parent

Answer 3

通过在代码中手动更改宽度来修复它。

移动 RelativeLayout 时 ImageView 的大小略有增加 (Android)

ImageView increases slightly in size when moving RelativeLayout (Android)

android

ontouchlistener

android-layout

android-imageview

android-relativelayout