也许不能回答这个具体问题,但如果有人像我一样寻求答案,如何在图像中塑造形象 视带界限的大小(例如maxWidth),同时保护Aspect比率,然后消除图像学所占用的过度空间,最简单的解决办法是在XML中使用以下特性:

    android:scaleType="centerInside"
    android:adjustViewBounds="true"

<ImageView android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:scaleType="centerCrop"
           android:adjustViewBounds="true"/>

下面的法典使标尺完全与图象相同。 借助图象参数计算新的高度和宽度。 这给你带来了最佳的图像。

int currentBitmapWidth = bitMap.getWidth();
int currentBitmapHeight = bitMap.getHeight();

int ivWidth = imageView.getWidth();
int ivHeight = imageView.getHeight();
int newWidth = ivWidth;

newHeight = (int) Math.floor((double) currentBitmapHeight *( (double) new_width / (double) currentBitmapWidth));

Bitmap newbitMap = Bitmap.createScaledBitmap(bitMap, newWidth, newHeight, true);

imageView.setImageBitmap(newbitMap)

享有。

争取在<条码>上添加<条码>;

this can all be done using XML... the other methods seem pretty complicated. Anyway, you just set the height to what ever you want in dp, then set the width to wrap content or visa versa. Use scaleType fitCenter to adjust the size of the image.

<ImageView
    android:layout_height="200dp"
    android:layout_width="wrap_content"
    android:scaleType="fitCenter"
    android:adjustViewBounds="true"
    android:src="@mipmap/ic_launcher"
    android:layout_below="@+id/title"
    android:layout_margin="5dip"
    android:id="@+id/imageView1">

在大多数情况下行之有效的最佳解决办法是

例如:

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

在寻找一天之后,我认为这是最容易的解决办法:

imageView.getLayoutParams().width = 250;
imageView.getLayoutParams().height = 250;
imageView.setAdjustViewBounds(true);

Edited Jarno Argillanders answer:

How to fit Image with your Width and Height:

1) Initialize ImageView and set Image:

iv = (ImageView) findViewById(R.id.iv_image);
iv.setImageBitmap(image);

2) 现改为:
。

scaleImage(iv);

∗ ∗∗∗∗∗∗

private void scaleImage(ImageView view) {
    Drawable drawing = view.getDrawable();
    if (drawing == null) {
        return;
    }
    Bitmap bitmap = ((BitmapDrawable) drawing).getBitmap();

    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int xBounding = ((View) view.getParent()).getWidth();//EXPECTED WIDTH
    int yBounding = ((View) view.getParent()).getHeight();//EXPECTED HEIGHT

    float xScale = ((float) xBounding) / width;
    float yScale = ((float) yBounding) / height;

    Matrix matrix = new Matrix();
    matrix.postScale(xScale, yScale);

    Bitmap scaledBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
    width = scaledBitmap.getWidth();
    height = scaledBitmap.getHeight();
    BitmapDrawable result = new BitmapDrawable(context.getResources(), scaledBitmap);

    view.setImageDrawable(result);

    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) view.getLayoutParams(); 
    params.width = width;
    params.height = height;
    view.setLayoutParams(params);
}

And xml:

<ImageView
    android:id="@+id/iv_image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal" />

如果它不为你工作,那么它就会取代和roid:背井和roid:

android:src will play the major trick

    <ImageView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:scaleType="fitCenter"
    android:src="@drawable/bg_hc" />

s s

使用该守则:

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

我就是这样。

<ImageView android:layout_width="match_parent"
           android:layout_height="wrap_content"     
           android:layout_centerHorizontal="true"         
           android:scaleType="centerCrop"
           android:adjustViewBounds="true" />

我需要有《图像评论》和《比图》,因此,比图被缩小到《图像观察》的大小,《图像评论》的大小与“比图”的相同。

我正在通过这一职位来研究如何做到这一点,最后,我想要做的是做些什么,而不是这里描述的方式。

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/acpt_frag_root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/imageBackground"
android:orientation="vertical">

<ImageView
    android:id="@+id/acpt_image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:adjustViewBounds="true"
    android:layout_margin="@dimen/document_editor_image_margin"
    android:background="@color/imageBackground"
    android:elevation="@dimen/document_image_elevation" />

之后 观点方法

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_scanner_acpt, null);

    progress = view.findViewById(R.id.progress);

    imageView = view.findViewById(R.id.acpt_image);
    imageView.setImageBitmap( bitmap );

    imageView.getViewTreeObserver().addOnGlobalLayoutListener(()->
        layoutImageView()
    );

    return view;
}

之后的《职业守则》

private void layoutImageView(){

    float[] matrixv = new float[ 9 ];

    imageView.getImageMatrix().getValues(matrixv);

    int w = (int) ( matrixv[Matrix.MSCALE_X] * bitmap.getWidth() );
    int h = (int) ( matrixv[Matrix.MSCALE_Y] * bitmap.getHeight() );

    imageView.setMaxHeight(h);
    imageView.setMaxWidth(w);

}

And the result is that image fits inside perfectly, keeping aspect ratio, and doesn t have extra leftover pixels from ImageView when the Bitmap is inside.

https://i.stack.imgur.com/X9VZO.jpg”rel=“nofollow noreferer”>Result

/*An optional argument to supply a maximum height for this view. Only valid if
 * {@link #setAdjustViewBounds(boolean)} has been set to true. To set an image to be a
 * maximum of 100 x 100 while preserving the original aspect ratio, do the following: 1) set
 * adjustViewBounds to true 2) set maxWidth and maxHeight to 100 3) set the height and width
 * layout params to WRAP_CONTENT. */