Positioning an image inside an ImageView with gravity: top

Question

      ╔════════════════════════════════════════════════════════╗
      ║               Linear Layout  (Center)                  ║
      ║    ╔══════════════════════════════════════════════╗    ║   
      ║    ║ ImageView    ╔══════════════╗                ║    ║
      ║    ║              ║              ║    (Center)    ║    ║
      ║    ║              ║ Actual image ║                ║    ║
      ║    ║              ║              ║                ║    ║
      ║    ║              ║  (Center)    ║                ║    ║
      ║    ║              ║              ║                ║    ║
      ║    ║              ╚══════════════╝                ║    ║
      ║    ╚══════════════════════════════════════════════╝    ║ 
      ║                                                        ║
      ╚════════════════════════════════════════════════════════╝

And I want to do this:

      ╔════════════════════════════════════════════════════════╗
      ║               Linear Layout  (Center)                  ║
      ║    ╔══════════════════════════════════════════════╗    ║   
      ║    ║ ImageView    ║              ║                ║    ║
      ║    ║              ║              ║    (Center)    ║    ║
      ║    ║              ║ Actual image ║                ║    ║
      ║    ║              ║              ║                ║    ║
      ║    ║              ║  (Top)       ║                ║    ║
      ║    ║              ║              ║                ║    ║
      ║    ║              ╚══════════════╝                ║    ║
      ║    ╚══════════════════════════════════════════════╝    ║ 
      ║                                                        ║
      ╚════════════════════════════════════════════════════════╝

Note that : imageview has gravity center with Linear Layout I want the image in the imageview has gravity top, i try to set gravity:top, but nothing change. Help me

Edit: this is my xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:background="@color/all_white">
    <LinearLayout android:id="@+id/title_bar" style="@style/TitleBar">
        <TextView android:layout_width="wrap_content" 
            android:id="@+id/tv_printweb"
            android:singleLine="true" 
            android:ellipsize="end" 
            style="@style/ScreenTitleText" />
    </LinearLayout>
    <RelativeLayout android:orientation="vertical"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:layout_below="@+id/tv_web_filename" 
        android:layout_above="@+id/tv_web_page_num"
        android:layout_weight="1" 
        android:background="@color/background">
        <LinearLayout android:id="@+id/ln_web_pre"
            android:layout_width="30dp" 
            android:layout_height="fill_parent"
            android:layout_alignParentLeft="true" 
            android:gravity="center">
            <Button android:id="@+id/btn_web_pre" 
                android:layout_width="40dp"
                android:layout_height="120dp" 
                android:background="@drawable/bt_left"
                />
        </LinearLayout>
        <LinearLayout android:id="@+id/ln_web_zoomview"
            android:layout_width="fill_parent" 
            android:layout_height="fill_parent"
            android:background="@color/all_white" 
            android:orientation="vertical"
            android:gravity="center" 
            android:layout_centerInParent="true">
            <ImageView android:id="@+id/web_zoomview"
                android:layout_width="fill_parent" 
                android:layout_height="wrap_content"
                android:background="@color/all_white" 
                android:layout_gravity="top"
                />

        </LinearLayout>
        <LinearLayout android:id="@+id/llCircle"
                android:layout_height="fill_parent" 
                android:layout_width="fill_parent"
                android:layout_marginRight="40dp" 
                android:layout_marginLeft="40dp" 
                android:layout_marginBottom="25dp" 
                android:layout_marginTop="25dp">
        </LinearLayout>
        <LinearLayout android:id="@+id/ln_web_next"
            android:layout_width="30dp" 
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true" 
            android:gravity="center">
            <Button android:id="@+id/btn_web_next" 
                android:layout_width="40dp"
                android:layout_height="120dp" 
                android:background="@drawable/bt_right_1"
                />
        </LinearLayout>
        <RelativeLayout android:id="@+id/pagebar_web_top"
            android:layout_width="fill_parent" 
            android:layout_height="30dp"
            android:layout_alignParentTop="true" 
            android:gravity="center_vertical"
            android:paddingLeft="10dip" 
            android:paddingRight="10dip">
            <TextView android:id="@+id/tv_web_page_size"
                android:layout_width="wrap_content" 
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true" 
                android:gravity="center"
                android:text="Paper Size" 
                android:textColor="@color/all_black"
                android:textStyle="bold" 
                android:background="@drawable/paper_border" />
        </RelativeLayout>

        <RelativeLayout android:id="@+id/web_pagebar"
            android:layout_width="fill_parent" 
            android:layout_height="50dp"
            android:layout_alignParentBottom="true" 
            android:gravity="left"
            android:paddingLeft="10dip" 
            android:paddingRight="10dip">
            <TextView android:id="@+id/tv_page_num"
                android:layout_width="wrap_content" 
                android:layout_height="wrap_content"
                android:layout_centerVertical="true" 
                android:gravity="center"
                android:text="1/1" 
                android:textColor="@color/all_black"
                android:textStyle="bold" 
                android:background="@drawable/paper_border" />
            <Button android:id="@+id/btn_web_orientation"
                android:layout_width="50dp" 
                android:layout_height="50dp"
                android:layout_alignParentRight="true" 
                android:background="@drawable/rotate_l" />
        </RelativeLayout>

    </RelativeLayout>
    <LinearLayout android:gravity="right|center_horizontal"
        android:id="@+id/toolbar" 
        style="@style/FunctionBar">
        <Button android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:id="@+id/btn_web_print"
            style="@style/FunctionButton" 
            android:text="@string/str_print" />
    </LinearLayout>
</LinearLayout>

Assumed

This https://mcmap.net/q/356173/-android-image-view-gravity answered the question for me – Candice

I put an answer here. It helped my centralize Imageview. – Brattice

Answer 1

Set the scaleType to fitStart in your XML:

<ImageView
    android:id="@+id/ivMap"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitStart" >
</ImageView>

Mindy

Thanks. i was playing with gravity which had no outputs, scaleType was the one which i was searching for.. – Inez

This doesn't centre the image – Azotic

although, when animating this fitCenter is probably the only one, one would like to use] – Wheezy

Answer 2

You can use ImageView.ScaleType.MATRIX and set image matrix using ImageView.setImageMatrix(). Matrix can be obtained using Matrix.setRectToRect() method.

Castellated

Answer 3

Please check Terel's answer, which is said to be the correct answer.

Depending on what else is in the layout, a solution could be to use another layout (i.e. a FrameLayout which is rather light) in place of the ImageView, and have the ImageView in place of the actual image, with its android:layout_gravity="top".

Blackdamp

I use Linear layout. I try all of your comment, but i can only change the position of imageview, not image inside imageview – Assumed

@ZuzooVn: the only way to move an image inside ImageView is using android:scaleType, and the only setting that will let you do what you want is android:scaleType="matrix", with a matrix that will translate to the horizontal center the image. As this is non trivial, I suggest rethinking your layout. (see my suggestion) – Blackdamp

Answer 4

Have you tried using the attribute android:gravity = "top" I see that for your ImageView you are using android:layout_gravity maybe you could try using the other one. As far as I know, the "android:layout_gravity" attribute is used for setting the gravity of the element within its parent, while the "android:gravity" attribute is for setting the gravity of the element's contents. (Someone correct me if I'm wrong! =P hehe!)

Phonetist

Answer 5

Wouldn't it be easier to use a RelativeLayout? With android:layout_alignParentTop="true" and android:layout_centerHorizontal="true" you can achieve the desired effect.

Competitive

i must use linear layout. See my xml in my post – Assumed

Is there a specific reason why you encapsulate every view in a seperate layout? I don't see the necessity of it... – Competitive

I use it in my code. It make me easier to display many thing in my app – Assumed

Did you try android:layout_gravity="top|center"? – Competitive

There are two solutions I've found if you want to keep the structure you have at the moment. Either you set the LinearLayout android:layout_height to wrap_content or you set the gravity of the LinearLayout to top. – Competitive