如何使用 ImageView 显示全尺寸图像？

Question

I have problem when I try to display the image with full size. I tried to display image with wrap_content. But it is smaller real image.

<ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/screen1_logo" />

I go to the properties of this image and see some information: dimentions 211 x 74. Then I try to display image with fixed width and height. I see it's bigger.

<ImageView
        android:layout_width="211px"
        android:layout_height="74px"
        android:src="@drawable/screen1_logo" />

is it right way? do we must to fix size to display image with full size? Please help me to explain and resolve this problem.

Answer 1

add a scaleType to your ImageView

 <ImageView
     android:scaleType="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/screen1_logo" />

from the doc android:scaleType="center"

Center the image in the view, but perform no scaling.

Answer 2

Try adding in xml file (ImageView properties) android:adjustViewBounds="true".

<ImageView
    android:id="@+id/photoViewer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"

Answer 3

Try adding a scaleType attribute to your view:

android:scaleType=""

The available options can be found here:

http://developer.android.com/reference/android/widget/ImageView.ScaleType.html

Answer 4

Please Define scale type as fitXY

 <ImageView
            android:id="@+id/yourImageViewId"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="fitXY" />

Answer 5

You are probably looking for scaleType

http://developer.android.com/reference/android/widget/ImageView.ScaleType.html

Answer 6

    android:layout_width="match_parent"
    android:layout_height="160dp"
    android:layout_marginStart="0dp"
    android:layout_marginTop="0dp"
    android:layout_marginBottom="40dp"
    android:scaleType="centerInside"

It's important don't to have width/height = wrap_content because in that way your imageView size is equal to photos so it can't be moved.

Here you can see what is going to look like. https://guides.codepath.com/android/Working-with-the-ImageView