I had the same problem but then realized the arrangement of my icon graphic within the square allowed (512 x 512 in my case) was not maximized. So I rotated the image and was able to scale it up to fill the corners better. Then I right clicked on my res folder in my project in Android Studio, then choose New then Image Asset, it took me through a wizard where I got to select my image file to use. Then if you check the box that says "Trim surrounding blank space", it makes sure all edges, that are able, touch the sides of your square. These steps got it much bigger than the original.

你可以直接在android studio中创建图标。你需要遵循的步骤是:

1.右击Res->New->图像资产

2.将资产类型更改为图像。

3.从本地磁盘加载映像

4.你可以选择修剪，改变填充和添加背景也。如果需要，可以更改值。

5.单击Next - > Finish。

该图像将自动添加到mimmap -mdpi, mimmap -hdpi, mimmap -xhdpi, mimmap -xxhdpi, mimmap -xxxhdpi，如果您选择启动器图标或mimmap -xxxhdpi 如果您选择其他图标选项，则可绘制mdpi，可绘制hdpi，可绘制xhdpi，可绘制xxhdpi，可绘制xxxhdpi。

用于谷歌Play Store应用程序提交的启动图像和斜杠图像大小

高分辨率图标。PFB表为所需尺寸 32位PNG(带alpha)，尺寸:512px * 512px，最大文件大小:1024KB

所需的启动图标和飞溅图像大小

总体上至少需要2张截图(每种类型最多8张截图，类型包括“手机”，“7英寸平板电脑”和“10英寸平板电脑”) JPEG或24位PNG(无alpha)，最小尺寸:320px，最大尺寸:3840px，样本尺寸:320 x 480,480 x 800,480 x 854,1280 x 720, 1280 x 800 24位PNG或JPEG

I had the same problem but then realized the arrangement of my icon graphic within the square allowed (512 x 512 in my case) was not maximized. So I rotated the image and was able to scale it up to fill the corners better. Then I right clicked on my res folder in my project in Android Studio, then choose New then Image Asset, it took me through a wizard where I got to select my image file to use. Then if you check the box that says "Trim surrounding blank space", it makes sure all edges, that are able, touch the sides of your square. These steps got it much bigger than the original.

我已经发布了一个脚本，从一个SVG图标文件生成PhoneGap应用程序的所有平台图标。如果您有现有的位图，我还提供了一些注释，可以帮助您从现有的位图生成SVG向量。这并不适用于所有位图，但可能适用于你的位图。

https://github.com/tohagan/phonegap-graphics

我会为每一个创建单独的图像:

LDPI should be 36 x 36.

MDPI should be 48 x 48.

TVDPI should be 64 x 64.

HDPI should be 72 x 72.

XHDPI should be 96 x 96.

XXHDPI should be 144 x 144.

XXXHDPI should be 192 x 192.

然后把它们分别放在可绘制文件夹的茎中。

当你将应用上传到谷歌Play Store时，你还需要提供一个大版本的图标，这应该是WEB 512 x 512。这是如此之大，以至于谷歌可以重新缩放到任何大小，以便在谷歌Play Store中宣传你的应用程序，而不添加像素到你的标志。

基本上，所有其他图标都应该与“基线”图标成比例，MDPI为48 x 48。

LDPI is MDPI x 0.75.

TVDPI is MDPI x 1.33.

HDPI is MDPI x 1.5.

XHDPI is MDPI x 2.

XXHDPI is MDPI x 3.

XXXHDPI is MDPI x 4.

这一切都在Android开发者网站的图标页面上进行了解释: http://developer.android.com/design/style/iconography.html(截至2014年) 材料设计原则:https://material.io/design/iconography/product-icons.html 游戏商店指南:https://developer.android.com/distribute/google-play/resources/icon-design-specifications