Question

我想在我的布局中添加未知数量的ImageView次视图，并带有边距。在XML中，我可以像这样使用layout_margin：

<ImageView android:layout_margin="5dip" android:src="@drawable/image" />

有ImageView.setPadding()，但没有ImageView.setMargin()。我认为它符合ImageView.setLayoutParams(LayoutParams)的范围，但不确定该提供什么。

有人知道吗？

Answer 1

android.view.ViewGroup.MarginLayoutParams有一个方法setMargins(left, top, right, bottom)。直接子类包括：FrameLayout.LayoutParams，LinearLayout.LayoutParams和RelativeLayout.LayoutParams。

使用例如LinearLayout：

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(left, top, right, bottom);
imageView.setLayoutParams(lp);

MarginLayoutParams

这会设置边距（以像素为单位）。要缩放它，请使用

context.getResources().getDisplayMetrics().density

DisplayMetrics

Answer 2

    image = (ImageView) findViewById(R.id.imageID);
    MarginLayoutParams marginParams = new MarginLayoutParams(image.getLayoutParams());
    marginParams.setMargins(left_margin, top_margin, right_margin, bottom_margin);
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(marginParams);
    image.setLayoutParams(layoutParams);

Answer 3

以上所有示例实际上都会 REPLACE 为视图提供的任何参数，这可能是不合需要的。以下代码将扩展现有的参数，而不替换它们：

Make    Model   Year    Sales
Toyota  Corolla 2014    15
Toyota  Camry   2014    12
Toyota  RAV4    2014    4

Answer 4

Kevin的代码创建了冗余的MarginLayoutParams对象。更简单的版本：

ImageView image = (ImageView) findViewById(R.id.main_image);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(image.getLayoutParams());
lp.setMargins(50, 100, 0, 0);
image.setLayoutParams(lp);

Answer 5

如果您想更改图像视图边距，但保留所有其他边距。

在这种情况下获取图片视图的MarginLayoutParameters：myImageView

 MarginLayoutParams marginParams = (MarginLayoutParams) myImageView.getLayoutParams();

现在只需更改您想要更改的保证金，但保留原来的保证金：

 marginParams.setMargins(marginParams.leftMargin, 
                         marginParams.topMargin, 
                         150, //notice only changing right margin
                         marginParams.bottomMargin);

Answer 6

如果要在dp：

中指定边距，可以使用此方法

private void addMarginsInDp(View view, int leftInDp, int topInDp, int rightInDp, int bottomInDp) {
    DisplayMetrics dm = view.getResources().getDisplayMetrics();
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    lp.setMargins(convertDpToPx(leftInDp, dm), convertDpToPx(topInDp, dm), convertDpToPx(rightInDp, dm), convertDpToPx(bottomInDp, dm));
    view.setLayoutParams(lp);
}

private int convertDpToPx(int dp, DisplayMetrics displayMetrics) {
    float pixels = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, displayMetrics);
    return Math.round(pixels);
}

Answer 7

我只使用它并且效果很好：

ImageView imageView = (ImageView) findViewById(R.id.image_id);
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) imageView.getLayoutParams();
layoutParams.setMargins(left, top, right, bottom);
imageView.setLayoutParams(layoutParams);

setMargins（）的单位是像素而不是dp。如果要在dp中设置边距，只需在 values / dimens.xml 文件中创建尺寸，如：

<resources>
    <dimen name="right">16dp</dimen>
    <dimen name="left">16dp</dimen>    
</resources>

并访问如下：

getResources().getDimension(R.dimen.right);

Answer 8

动态创建布局并设置其参数，因为setmargin（）不能直接在imageView
上工作

ImageView im;
im = (ImageView) findViewById(R.id.your_image_in_XML_by_id);
 RelativeLayout.LayoutParams layout = new RelativeLayout.LayoutParams(im.getLayoutParams());
                        layout.setMargins(counter*27, 0, 0, 0);//left,right,top,bottom
                        im.setLayoutParams(layout);
                        im.setImageResource(R.drawable.yourimage)

Answer 9

对我来说这很有效：

int imgCarMarginRightPx = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, definedValueInDp, res.getDisplayMetrics());

MarginLayoutParams lp = (MarginLayoutParams) imgCar.getLayoutParams();
lp.setMargins(0,0,imgCarMarginRightPx,0);
imgCar.setLayoutParams(lp);

Answer 10

如果您使用kotlin，可以通过创建扩展功能

来简化

fun View.setMarginExtensionFunction(left: Int, top: Int, right: Int, bottom: Int) {
  val params = layoutParams as ViewGroup.MarginLayoutParams
  params.setMargins(left, top, right, bottom)
  layoutParams = params
}

现在您只需要一个视图，此扩展功能可以在任何地方使用。

val imageView = findViewById(R.id.imageView)
imageView.setMarginExtensionFunction(0, 0, 0, 0)

Answer 11

示例代码在这里，非常简单

LayoutParams params1 = (LayoutParams)twoLetter.getLayoutParams();//twoletter-imageview
                params1.height = 70;
                params1.setMargins(0, 210, 0, 0);//top margin -210 here
                twoLetter.setLayoutParams(params1);//setting layout params
                twoLetter.setImageResource(R.drawable.oo);

Answer 12

从2020年开始的答案：

dependencies {
    implementation "androidx.core:core-ktx:1.2.0"
}

并在您的代码中对其进行校准

view.updateLayoutParams<ViewGroup.MarginLayoutParams> {
   setMargins(5)
}

Answer 13

使用与此类似的方法可能会在某些情况下让您感到头疼。如果你有两次通过程序修改边距，那么检查是否已经设置了一些layoutParams更安全。如果有一些余量，则应该增加它们而不是替换它们：

public void addMargins(View v, int left, int top, int right, int bottom) {
    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) v.getLayoutParams();
    if (params == null)
        params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                                               ViewGroup.LayoutParams.WRAP_CONTENT);
    int oldLeft = params.leftMargin;
    int oldTop = params.topMargin;
    int oldRight = params.rightMargin;
    int oldBottom = params.bottomMargin;
    params.setMargins(oldLeft + left, oldTop + top, oldRight + right, oldBottom + bottom);
    v.setLayoutParams(params);
}

Answer 14

下面是在左侧，顶部，右侧，底部添加8px边距的示例。


ImageView imageView = new ImageView(getApplicationContext());

ViewGroup.MarginLayoutParams marginLayoutParams = new ViewGroup.MarginLayoutParams(
    ViewGroup.MarginLayoutParams.MATCH_PARENT,
    ViewGroup.MarginLayoutParams.WRAP_CONTENT
);

marginLayoutParams.setMargins(8, 8, 8, 8);

imageView.setLayoutParams(marginLayoutParams);

Answer 15

在Kotlin中，您可以用更愉快的方式编写

myView.layoutParams = LinearLayout.LayoutParams(
                RadioGroup.LayoutParams.MATCH_PARENT, RadioGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(12, 12, 12, 12)
            }

Answer 16

我们可以创建线性LayoutParams ，并使用 resources.getDimensionPixelSize 作为dp值。

    val mContext = parent.context
    val mImageView = AppCompatImageView(mContext)
    mImageView.setBackgroundResource(R.drawable.payment_method_selector)

    val height = mContext.resources.getDimensionPixelSize(R.dimen.payment_logo_height)
    val width = mContext.resources.getDimensionPixelSize(R.dimen.payment_logo_width)
    val padding = mContext.resources.getDimensionPixelSize(R.dimen.spacing_small_tiny)
    val margin = mContext.resources.getDimensionPixelSize(R.dimen.spacing_small)

    mImageView.layoutParams = LinearLayout.LayoutParams(width, height).apply {
        setMargins(margin, margin, 0, 0)
    }
    mImageView.setPadding(padding, padding, padding, padding)

如何使用代码而不是xml设置ImageView的边距

16 个答案: