如何裁剪 ImageView 的位图?

本文介绍了如何裁剪 ImageView 的位图?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我知道这应该很简单，但是 android:scaleType="centerCrop" 不会裁剪图像

I know this should be simple , but android:scaleType="centerCrop" doesn't crop Image

我的图像 1950 像素 宽，需要按照父级的宽度进行裁剪.但是 android:scaleType="centerCrop" 不会裁剪图像.我需要在布局中做什么才能仅显示前 400 像素，例如，或者任何屏幕/父宽度是

I got image 1950 pixels wide and need it to be cropped by parent's width. But android:scaleType="centerCrop" doesn't crop Image. What do I need to do in layout to show only first 400 pixels, for instance or whatever screen/parent width is

抱歉，问题很简单 - 尝试用谷歌搜索 - 那里只有复杂的问题.而且我是新人，所以请不要投反对票)

Sorry for simple question - tried to Google it - only complicated questions there. And I'm new, so don't downvote please)

<RelativeLayout xmlns:android="schemas.android/apk/res/android" xmlns:tools="schemas.android/tools" android:id="@+id/rl1" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/background_color"> <ImageView android:id="@+id/ver_bottompanelprayer" android:layout_width="match_parent" android:layout_height="227px" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:scaleType="matrix" android:background="@drawable/ver_bottom_panel_tiled_long" /> </RelativeLayout>

如果唯一的方法是通过编程方式裁剪它 - 请给我一个方法的建议

if there's only way is to programmaticaly crop it - please give me an advice with a method

推荐答案

好的，我将把评论粘贴为答案:) ->

Alright, I will paste the comment as answer :) ->

RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl1); final Options bitmapOptions=new Options(); DisplayMetrics metrics = getResources().getDisplayMetrics(); bitmapOptions.inDensity = metrics.densityDpi; bitmapOptions.inTargetDensity=1; /*`final` modifier might be necessary for the Bitmap*/ Bitmap bmp= BitmapFactory.decodeResource(getResources(), R.drawable.ver_bottom_panel_tiled_long, bitmapOptions); bmp.setDensity(Bitmap.DENSITY_NONE); bmp = Bitmap.createBitmap(bmp, 0, 0, rl.getWidth(), bmp.getHeight());

然后在代码中:

ImageView iv = (ImageView)v.findViewById(R.id.ver_bottompanelprayer); if (iv != null){ iv.setImageBitmap(bmp); }

干杯:)