我想给我的布局添加未知数量的ImageView视图，并留有边距。在XML中，可以这样使用layout_margin：
<ImageView android:layout_margin="5dip" android:src="@drawable/image" />
有ImageView.setPadding()，但没有ImageView.setMargin()。我认为这是与ImageView.setLayoutParams(LayoutParams)相似的，但不确定该输入什么。
有人知道吗？
android.view.ViewGroup.MarginLayoutParams具有方法setMargins(left, top, right, bottom)。直接子类是：FrameLayout.LayoutParams，LinearLayout.LayoutParams和RelativeLayout.LayoutParams。
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);
这将以像素为单位设置边距。要缩放，请使用
context.getResources().getDisplayMetrics().density
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);
以上所有示例实际上将REPLACE对于View已经存在的任何参数，这可能是不希望的。下面的代码将扩展现有的参数，而不替换它们：
ImageView myImage = (ImageView) findViewById(R.id.image_view);
MarginLayoutParams marginParams = (MarginLayoutParams) image.getLayoutParams();
marginParams.setMargins(left, top, right, bottom);
Kevin的代码创建了冗余的MarginLayoutParams对象。简单版本：
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);
如果要更改图像视图边距，但保留所有其他边距不变。
在这种情况下，获取图像视图的MarginLayoutParameters：myImageView
MarginLayoutParams marginParams = (MarginLayoutParams) myImageView.getLayoutParams();
现在只需更改要更改的边距，而其他保留不变：
marginParams.setMargins(marginParams.leftMargin,
marginParams.topMargin,
150, //notice only changing right margin
marginParams.bottomMargin);
如果要在dp中指定边距，则可以使用此方法：
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);
}
我只是简单地使用它，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中设置页边距，只需在values / dimens.xml文件内部创建尺寸，例如：
<resources>
<dimen name="right">16dp</dimen>
<dimen name="left">16dp</dimen>
</resources>
和访问方式：
getResources().getDimension(R.dimen.right);
如果使用kotlin，则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，并且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)
动态创建布局并将其参数设置为setmargin（）将无法直接在imageView上使用
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)
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);
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);
使用类似的方法在某些情况下可能会为您节省一些麻烦。如果您有两次遍历的程序设计修补程序，并且有边距，则检查是否已经设置了layoutParams更为安全。如果已经有一些边距，则应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);
}
这里是在左侧，顶部，右侧，底部添加8px页边距的示例。
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);
2020年起的答案：
dependencies {
implementation "androidx.core:core-ktx:1.2.0"
}
只需在您的代码中对其进行校准
view.updateLayoutParams<ViewGroup.MarginLayoutParams> {
setMargins(5)
}