blocks|key|1725397|text|我建议您尽可能地压缩.jpg文件，这将大大减少.apk文件的大小。像Paint.NET这样的免费工具应该可以帮助您做到这一点。它有很好的调整大小的选项。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1725398|entityMap|0|LINK|mutability|MUTABLE|url|http://www.getpaint.net/^0|A|4|N|4|Y|9|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

I would recommend that you compress the <code>.jpg</code> files as much as possible, this should greatly reduce the size of your <code>.apk</code> file. A tool such as <a href="http://www.getpaint.net/" rel="noreferrer">Paint.NET</a> which is free should help you do this. It has great resizing options.

blocks|key|2081133|text|其他答案提到了缩小的图像。您还可以考虑尝试ProGuard来缩小字节码。这是一篇文章将ProGuard应用于安卓应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2081134|entityMap|0|LINK|mutability|MUTABLE|url|http://proguard.sourceforge.net/|1|http://blog.javia.org/android-and-proguard-the-perfect-pair/^0|L|8|0|10|6|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

Other answers mention shrinking images. You might also consider trying <a href="http://proguard.sourceforge.net/" rel="noreferrer">ProGuard</a> to shrink your bytecode. <a href="http://blog.javia.org/android-and-proguard-the-perfect-pair/" rel="noreferrer">Here's an article</a> on applying ProGuard to an Android app.

blocks|key|2081346|text|更新|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2081347|随着Support+23.2的引入，现在您可以用SVG+(+w/或w/o动画)替换您的图像资产，以进一步减少apk大小。|2081348|原始|2081349|这可能是一个较晚的答复，但可能对未来的用户有帮助。|2081350|请参考此链接。为了总结这一页，它在下面提到了一些要点，这些要点将有助于减少apk的总体大小：|2081351|使用ProGaurd|unordered-list-item|2081352|删除应用程序中的任何调试信息(如Log.i())。它们可以在测试应用程序时才启用的条件下包装。|2081353|使用推荐的媒体格式+|2081354|图片:+PNG+orJPG|2081355|音频:+AAC|2081356|视频:+H264+AVC|2081357|2081358|​|2081359|使用OptiPNG或PNGCrush压缩图像|2081360|利用9贴片实现缩放图像|2081361|使用这个工具查找未使用的资源，删除它们。|2081362|避免使用多个资源来实现相同的功能。这些资源不仅限于图像，而且扩展到API。有时，单个API可以提供多个结果，而不是使用两个或三个不同的API。重复的字符串和资产也是浪费空间。|2081363|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.sonymobile.com/2012/01/31/tips-for-reducing-apk-file-size/|1|http://optipng.sourceforge.net/|2|http://pmt.sourceforge.net/pngcrush/|3|http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-patch|4|https://code.google.com/p/android-unused-resources/^0|0|2|0|0|0|2|0|0|4|2|0|0|2|8|0|0|E|0|2|7|1|1|1|1|0|0|0|M|2|7|1|A|8|2|0|0|B|2|3|3|0|0|K|4|2|4|0|0|2F|0^^$0|@$1|2|3|4|5|6|7|1R|8|@$9|1S|A|1T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1U|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1V|8|@$9|1W|A|1X|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1Z|8|@]|D|@$9|20|A|21|1|22]]|E|$]]|$1|N|3|O|5|P|7|23|8|@$9|24|A|25|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|P|7|26|8|@$9|27|A|28|B|C]]|D|@]|E|$]]|$1|S|3|T|5|P|7|29|8|@$9|2A|A|2B|B|C]]|D|@]|E|$]]|$1|U|3|V|5|P|7|2C|8|@]|D|@]|E|$]]|$1|W|3|X|5|P|7|2D|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|P|7|2E|8|@]|D|@]|E|$]]|$1|10|3|-4|5|6|7|2F|8|@]|D|@]|E|$]]|$1|11|3|12|5|6|7|2G|8|@]|D|@]|E|$]]|$1|13|3|14|5|P|7|2H|8|@$9|2I|A|2J|B|C]]|D|@$9|2K|A|2L|1|2M]|$9|2N|A|2O|1|2P]]|E|$]]|$1|15|3|16|5|P|7|2Q|8|@$9|2R|A|2S|B|C]]|D|@$9|2T|A|2U|1|2V]]|E|$]]|$1|17|3|18|5|P|7|2W|8|@$9|2X|A|2Y|B|C]]|D|@$9|2Z|A|30|1|31]]|E|$]]|$1|19|3|1A|5|P|7|32|8|@$9|33|A|34|B|C]]|D|@]|E|$]]|$1|1B|3|-4|5|6|7|35|8|@]|D|@]|E|$]]]|1C|$1D|$5|1E|1F|1G|E|$1H|1I]]|1J|$5|1E|1F|1G|E|$1H|1K]]|1L|$5|1E|1F|1G|E|$1H|1M]]|1N|$5|1E|1F|1G|E|$1H|1O]]|1P|$5|1E|1F|1G|E|$1H|1Q]]]]

UPDATE

With the introduction of Support Library 23.2, now you can replace many of your Image assets with SVG ( w/ or w/o animations) to reduce the apk size further.

ORIGINAL

This could be a late reply but might be helpful for future users.

Refer this <a href="http://developer.sonymobile.com/2012/01/31/tips-for-reducing-apk-file-size/">link</a>.
To summarise the page, it mentions below key points that will help reduce the apk size in totality:

<ul>
<li>Use ProGaurd</li>
<li>Remove any debug info you have in the app ( statements such as Log.i()). They can be wrapped in a condition which is only enabled while testing out the application.</li>
<li>Use recommended media formats

<ul>
<li>Image: PNG orJPG</li>
<li>Audio: AAC</li>
<li>Video: H264 AVC</li>
</ul></li>
<li>Compress images using <a href="http://optipng.sourceforge.net/">OptiPNG</a> or <a href="http://pmt.sourceforge.net/pngcrush/">PNGCrush</a></li>
<li>Use <a href="http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-patch">9patch</a> to scale images</li>
<li>Find unused resources using this <a href="https://code.google.com/p/android-unused-resources/">tool</a> and remove them.</li>
<li>Avoid using multiple resources to achieve the same functionality. The resources do not only limit to images but extend to APIs. At times a singular API can provide multiple results instead of using two or three different APIs. Duplicated strings and assets are also a waste of space.</li>
</ul>

blocks|key|1726053|text|转换为WebP，这将大大减少应用程序的大小|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1726054|它缩小了我的应用程序的大小，我的应用程序是40+mb+到+25+mb|BOLD|1726055|步骤：|1726056|右键单击res|unordered-list-item|1726057|转换为WebP|1726058|它所做的：它将png的大小缩小为WebP格式。质量也不会被破坏。|1726059|​|1726060|📷|atomic|1726061|1726062|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/665409a14da599200945bb9d51dc2f43.png|imageAlt^0|3|4|0|L|5|R|1|T|5|L|5|T|5|0|0|3|0|4|3|0|3|4|0|0|4|7|3|G|4|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@$9|1A|A|1B|B|H]|$9|1C|A|1D|B|H]|$9|1E|A|1F|B|H]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|I|3|J|5|6|7|1K|8|@$9|1L|A|1M|B|H]]|D|@]|E|$]]|$1|K|3|L|5|M|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|N|3|O|5|M|7|1Q|8|@$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1T|8|@$9|1U|A|1V|B|H]|$9|1W|A|1X|B|C]|$9|1Y|A|1Z|B|C]]|D|@]|E|$]]|$1|R|3|S|5|6|7|20|8|@]|D|@]|E|$]]|$1|T|3|U|5|V|7|21|8|@]|D|@$9|22|A|23|1|24]]|E|$]]|$1|W|3|S|5|6|7|25|8|@]|D|@]|E|$]]|$1|X|3|-4|5|6|7|26|8|@]|D|@]|E|$]]]|Y|$Z|$5|10|11|12|E|$13|14|15|-4]]]]

<h2>Convert to <code>WebP</code> which will significantly reduce the app size</h2>

It reduced the app size of my app which was <code>40 mb</code> to <code>25 mb</code> 

Steps:

<ul>
<li>Right click on <code>res</code></li>
<li>convert to <code>WebP</code></li>
</ul>

<hr>

What it does: It reduces the size to <code>png</code> to <code>WebP</code> format. Quality is also not destroyed 

<hr>

<a href="https://i.stack.imgur.com/OxJBJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OxJBJ.png" alt="enter image description here"></a>

blocks|key|528146|text|除了优化映像之外，我还发现验证您使用的支持库非常有用。我有一个使用API+>=10的相对简单的应用程序目标平台，但我的APK最终只有220万，或者在使用ProGuard之后是140万。当我查看APK时，代码是150万，其中包含了很多额外的资源(abc_*)，我对此一无所知。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|528147|然后我发现了这个：https://developer.android.com/tools/support-library/features.html|offset|length|528148|结果，我不需要appcompat-v7，只需要支持-v4，并且对我的依赖项所做的更改将APK的大小减少到1.7M+(使用ProGuard时为0.9M)。可以理解的是，支持库包含了大量额外的(代码和资源)，因此确保只使用所需的那些可能会有所帮助。|528149|(尽管-0.5M对于一个1100万应用程序来说并不重要，但我在这里发布这篇文章是因为我一直在这个页面上搜索解决方案.)|528150|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/tools/support-library/features.html^0|0|9|1T|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

Beyond optimizing images, I also found it useful to verify the Support Libraries you use. I have a relatively simple application targeting platforms with API >=10, still my APK ended up being 2.2M, or after using ProGuard, 1.4M. When I looked into the APK, the code was 1.5M and there were a lot of additional resources included (abc_*) I knew nothing about.

Then I found this: <a href="https://developer.android.com/tools/support-library/features.html" rel="noreferrer">https://developer.android.com/tools/support-library/features.html</a>

Turns out I did not need appcompat-v7, only support-v4, and making this change to my dependencies reduced the APK size to 1.7M (0.9M with ProGuard).
Understandably, the Support Libraries carry a lot of extra (code and resource), so making sure you use only the ones you need might help.

(Even though -0.5M is not significant for a 11M app, I am posting this here because I kept ending up on this page while searching for a solution...)

blocks|key|528239|text|使用镀锡压缩您的项目的png或jpg格式的图像文件，它可以大大减少图像的大小，而不会损失图像质量；|type|unordered-list-item|depth|inlineStyleRanges|entityRanges|offset|length|data|528240|有些图像使用小字体压缩可能会失真，你可以转换。
这些图像采用webP格式，使用智图或iSparta可以将其他格式转换成webP格式；|528241|使用Lint，检查不使用资源并删除；|528242|unstyled|entityMap|0|LINK|mutability|MUTABLE|url|https://tinypng.com/|1|http://zhitu.tencent.com/|2|http://isparta.github.io/^0|2|2|0|0|13|2|1|16|7|2|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@]|C|$]]|$1|H|3|-4|5|I|7|16|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]|S|$5|L|M|N|C|$O|T]]]]

<ul>
<li>Use <a href="https://tinypng.com/" rel="nofollow">tinypng</a> compress your project's png or
jpg format image files, It can greatly reduce the size of the image
without loss in image quality；</li>
<li>Some images use tinypng compress may distortion, you can convert 
these images to webP format, use <a href="http://zhitu.tencent.com/" rel="nofollow">智图</a> or 
<a href="http://isparta.github.io/" rel="nofollow">iSparta</a> can convert other format to webP;</li>
<li>Use Lint check no use resources and delete it;</li>
</ul>

blocks|key|1725948|text|四种方式和您的应用程序大小将从11.35MB到近5+MB。首先，通过Analyzer+(+Android的内置功能)检查应用程序组件，只需单击顶部的Build并单击Analyze。它将向您展示apk所使用的所有组件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725949|启用保护程序|ordered-list-item|1725950|启用ShrinkResource|1725951|resConfigs+(命名它，就像你的应用程序只有一种语言，比如英语，然后简单地指定resConfigs+"en")|1725952|将所有图像从.png+or.jpg转换为webp+(最重要)。|1725953|实现这些步骤的步骤。|1725954|1&+2.用于Proguard和ShrinkResource|1725955|在gradle中，只需添加|1725956|+++++++++++++++release+{
+++++++++++++++++++++++minifyEnabled+true
+++++++++++++++++++++++proguardFiles+getDefaultProguardFile('proguard-android.txt'),+'proguard-rules.pro'
+++++++++++++++++++++++shrinkResources+true
++++++++++++++++}|code-block|syntax|javascript|1725957|对于resConfigs
defaultConfig+{+applicationId+"com.goparties.gpuser“minSdkVersion+19+targetSdkVersion+27+resConfigs+"en”
}|1725958|将所有图像从.png+or.jpg转换为webp|1725959|非常简单的过程:只需右键单击可绘图文件夹(可绘制、可绘制-hdpi、drawable+xhdpi等)并单击convertToWebP+(最后一个选项)。|1725960|Min版本应该是18。|1725961|我们开始:现在分析您的应用程序的大小。|1725962|宾果！|1725963|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1A|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|1B|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|1C|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1D|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1E|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1F|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1G|8|@]|9|@]|A|$]]|$1|Q|3|R|5|S|7|1H|8|@]|9|@]|A|$T|U]]|$1|V|3|W|5|D|7|1I|8|@]|9|@]|A|$]]|$1|X|3|Y|5|D|7|1J|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1K|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|1L|8|@]|9|@]|A|$]]|$1|13|3|14|5|6|7|1M|8|@]|9|@]|A|$]]|$1|15|3|16|5|6|7|1N|8|@]|9|@]|A|$]]|$1|17|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|18|$]]

Four Ways and your app size will become from 11.35 MB to near about 5 MB.
First, check the app components via App Analyzer (an inbuilt feature of Android studio), Simply click on Build on the top and click Analyze APK. It will show you everything what components apk is using.

<ol>
<li>Enable Proguard</li>
<li>Enable ShrinkResource</li>
<li>resConfigs (Name it, like if your app is in only one language eg English then simply specify resConfigs "en")</li>
<li>Convert all Images from .png or.jpg to webp (Most Important).</li>
</ol>

Steps to achieve these steps.

1 &amp; 2. For Proguard and ShrinkResource

In gradle, simply add

<pre><code> release {
 minifyEnabled true
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 shrinkResources true
 }
</code></pre>

<ol start="3">
<li>For resConfigs

<pre><code> defaultConfig {
 applicationId "com.goparties.gpuser"
 minSdkVersion 19
 targetSdkVersion 27
 resConfigs "en"
</code></pre>

}</li>
<li>TO convert all Images from .png or.jpg to webp</li>
</ol>

Very easy process: Just right click on the drawable folder(drawable,drawable-hdpi, drawable-xhdpi etc) and click on convertToWebP (last option).

Min SDK version should be 18.

Here we go: Now analyze your app size.

Bingo !!!!!!

blocks|key|528114|text|还有一件事要添加到图像文件大小上--不同的算法会对最终的大小产生显著的影响。我发现雅虎的www.smushit.com比我现在电脑上的压缩机和译码器有效得多(至少对.png来说是这样)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|528115|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

One more thing to add on image file size - different algorithms can have a significant effect on the final size. I found that Yahoo's www.smushit.com is a lot more effective (at least for .png) than compressors and codecs I have on my computer right now.

blocks|key|2081174|text|我可以从经验中指出两件事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081175|如果您使用eclipse创建apk文件，那么资源就会被复制(至少在我的例子中是这样)，您可以尝试使用ant和build.xml来创建apk并比较大小。|ordered-list-item|2081176|同时也要寻找资源的别名。它的链接是这里。|offset|length|2081177|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/topics/resources/providing-resources.html#AliasResources^0|0|0|H|2|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|S|8|@]|9|@$G|T|H|U|1|V]]|A|$]]|$1|I|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P]]]]

There are two things I can point out from experience.

<ol>
<li>If you use eclipse to create apk file then the resources are duplicated (atleast it happened in my case), you can try using ant and build.xml to create the apk and compare the size.</li>
<li>Also look into aliasing the resources. The link for it is <a href="http://developer.android.com/guide/topics/resources/providing-resources.html#AliasResources" rel="nofollow">here</a>.</li>
</ol>

blocks|key|2081414|text|我认为这个帖子会给您一个更好的想法，在所有可能的方法使用，以减少您的apk规模的一个巨大的幅度。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2081415|我会给你一份同样的摘录。|2081416|只使用Google服务中所需的库。|ordered-list-item|2081417|将ProGuard应用于您的应用程序。|2081418|缩小和缩小。|2081419|采用矢量绘图。|2081420|用机器人皮棉。|2081421|根据体系结构拆分apk|2081422|在gradle文件中添加resConfigs以指定本地化语言。这将删除所有其他字符串文件，这些文件可能是由其他库以您甚至不支持的语言添加的。|2081423|entityMap|0|LINK|mutability|MUTABLE|url|https://blog.getsigneasy.com/engineering/signeasy-android-app-lighter/^0|5|2|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|17|8|@]|9|@]|C|$]]|$1|I|3|J|5|H|7|18|8|@]|9|@]|C|$]]|$1|K|3|L|5|H|7|19|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|1A|8|@]|9|@]|C|$]]|$1|O|3|P|5|H|7|1B|8|@]|9|@]|C|$]]|$1|Q|3|R|5|H|7|1C|8|@]|9|@]|C|$]]|$1|S|3|T|5|H|7|1D|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1E|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

I think this <a href="https://blog.getsigneasy.com/engineering/signeasy-android-app-lighter/" rel="nofollow">post</a> would give you a better idea on all the possible methods to use to reduce your apk size by a huge margin.

I will give you an excerpt of the same.

<ol>
<li>Use only the required libraries from Google Play Services.</li>
<li>Apply ProGuard to your app.</li>
<li>Minify and shrink.</li>
<li>Adopt vector drawables.</li>
<li>Use the android lint.</li>
<li>Split your apk based on the architectures</li>
<li>Adding resConfigs in your gradle files to specify localization languages. 

<blockquote>
 This strips away all other string files that could’ve been added by other libraries in languages you don’t even support. 
</blockquote></li>
</ol>

blocks|key|1725762|text|我知道我来这里是为了回答这个问题，但是我用下面的技术缩小了我的应用程序的大小，所以我想和所有的人分享这些东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725763|1)-使用WebP图像而不是Jpeg图像，如果您使用多个图像，它将对apk大小产生巨大影响。|1725764|2)如果您在应用程序中使用简单的小图标，则使用-Use+VectorDrawables。|1725765|3)-在xml中使用View的tint属性，以避免多个相同的图标，但颜色不同。|1725766|搜索DrawableTint和TintableImageview|blockquote|1725767|4)-使用9补丁图像，避免图像复制或应用程序代码中的任何内容。|1725768|下面是用于缩小APK大小的链接。|1725769|https://developer.android.com/topic/performance/reduce-apk-size.html|offset|length|1725770|https://developer.android.com/studio/build/configure-apk-splits.html#configure-split|1725771|https://developer.android.com/training/multiple-apks/index.html|1725772|entityMap|0|LINK|mutability|MUTABLE|url|1|2^0|0|0|0|0|0|0|0|0|1W|0|0|0|2C|1|0|0|1R|2|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|17|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|19|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1B|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1C|8|@]|9|@$Q|1D|R|1E|1|1F]]|A|$]]|$1|S|3|T|5|6|7|1G|8|@]|9|@$Q|1H|R|1I|1|1J]]|A|$]]|$1|U|3|V|5|6|7|1K|8|@]|9|@$Q|1L|R|1M|1|1N]]|A|$]]|$1|W|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|P]]|13|$5|Z|10|11|A|$12|T]]|14|$5|Z|10|11|A|$12|V]]]]

I know i am late here to answer this question but i reduce my app size using below techniques so i want to share these things with all.

1)- Use WebP images instead of Jpeg images, it will provide huge impact on apk size if you are using multiple images.

2)-Use VectorDrawables if you are using simple small icons in your app.

3)- Use View's tint property in xml to avoid multiple same icons but Different in color.

<blockquote>
 search DrawableTint and TintableImageview
</blockquote>

4)- Use 9-patch images and avoid duplication of image or anything in the app code. 

Below are the links to refer to reduce APK size.

<a href="https://developer.android.com/topic/performance/reduce-apk-size.html" rel="nofollow">https://developer.android.com/topic/performance/reduce-apk-size.html</a>

<a href="https://developer.android.com/studio/build/configure-apk-splits.html#configure-split" rel="nofollow">https://developer.android.com/studio/build/configure-apk-splits.html#configure-split</a>

<a href="https://developer.android.com/training/multiple-apks/index.html" rel="nofollow">https://developer.android.com/training/multiple-apks/index.html</a>

blocks|key|1725902|text|WebP图像格式:提供有损压缩(如JPEG)和透明度(如PNG)，但可以提供比JPEG或PNG更好的压缩。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725903|将图像转换为WebP|offset|length|1725904|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/studio/write/convert-webp.html#convert_images_to_webp^0|0|0|A|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

WebP image format: provides lossy compression (like JPEG) as well as transparency (like PNG) but can provide better compression than either JPEG or PNG

<a href="https://developer.android.com/studio/write/convert-webp.html#convert_images_to_webp" rel="nofollow noreferrer">Convert images to WebP</a>

blocks|key|2081729|text|除了上述最受欢迎的答案之外，我还想用谷歌的Android的最新工具来回答。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081730|谷歌最近推出了Android应用包，playstore将apk的优化版本自动交付给终端设备。现在开发人员只需生成签名包，并上传到play商店，开发工作就完成了。不要忘记总是使用SVG图像。|offset|length|2081731|另外，请查看一下具有动态特性的按需交付功能|2081732|​|2081733|📷|atomic|2081734|2081735|entityMap|0|LINK|mutability|MUTABLE|url|https://www.youtube.com/watch?v=9D63S4ZRBls|1|https://www.youtube.com/watch?v=httqEshs_Bk&feature=youtu.be|2|IMAGE|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/9d23209b2a2ead42aa03f5d17ad6b36f.png|imageAlt^0|0|7|A|0|0|8|D|1|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@$D|15|E|16|1|17]]|A|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|H|3|I|5|6|7|1C|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1D|8|@]|9|@$D|1E|E|1F|1|1G]]|A|$]]|$1|M|3|I|5|6|7|1H|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]|V|$5|Q|R|S|A|$T|W]]|X|$5|Y|R|Z|A|$10|11|12|-4]]]]

Along with the above most upvoted answers, I would like to answer with latest tools from Google's Android Studio. 

Google recently has introduced the <a href="https://www.youtube.com/watch?v=9D63S4ZRBls" rel="nofollow noreferrer">Android App Bundle</a> in which playstore automatically delivered optimized version of apk to end devices.
Now developers just has to generate Signed Bundle, and upload to play store, dev job is done. Don't forget always use SVG images. 

Also please have look into <a href="https://www.youtube.com/watch?v=httqEshs_Bk&amp;feature=youtu.be" rel="nofollow noreferrer">Deliver Features On-Demand with Dynamic Features</a>

<a href="https://i.stack.imgur.com/MV6QZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MV6QZ.png" alt="enter image description here"></a>

blocks|key|2081239|text|这里是您可以通过图片减少构建大小的方法(也可以用于iOS)+--我在这里分享一个名为“OPTIPNG”的伟大工具(您可以从这里下载)，它将帮助我们特别通过使用图像来减少构建，它将减少我们正在使用的PNG的图像大小，而不会降低图像的质量(分辨率和颜色)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2081240|示例-如果您的图像大小为698+KB，那么它将简化为564+KB。|2081241|下面是OPTIPNG+0.7.5的执行步骤|2081242|1)+OPTIPNG的终端->+CD+/YourLocal路径|2081243|2)类型“./配置”|2081244|3)输入“sudo”|2081245|现在应该做好准备。|2081246|4)类型：“优化/your图像路径”|2081247|您将得到以字节表示的结果，还可以检查您的大小。|2081248|entityMap|0|LINK|mutability|MUTABLE|url|http://goo.gl/FSNnI2^0|1P|2|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|16|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|17|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|18|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|1A|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1B|8|@]|9|@]|C|$]]|$1|R|3|S|5|6|7|1C|8|@]|9|@]|C|$]]|$1|T|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|U|$V|$5|W|X|Y|C|$Z|10]]]]

Here is what you can do for reduce build size by Images (Also can work for iOS)
Here I am sharing the great tool called “OPTIPNG ” (you can download from <a href="http://goo.gl/FSNnI2" rel="nofollow">here</a> )which will help us to reduced the build specially by using Images, It will reduced the Image size for PNGs we are using without degrading quality (Resolution and color) of the image.

Example – If your image size is off 698 KB then It will simpley reduced size to 564 KB

Here is the execution steps for OPTIPNG 0.7.5

1) Terminal -> CD /YourLocal path of OPTIPNG

2) type “./configure”

3) type ”sudo make install”

Intallation should be done now

4) type ” optipng /your image path

You will get result in byte and can also check your size

blocks|key|1725529|text|你也可以试试http://www.webresizer.com/resizer/，它是一种在线工具，对我做得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1725530|entityMap|0|LINK|mutability|MUTABLE|url|http://www.webresizer.com/resizer/^0|6|Y|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could also try <a href="http://www.webresizer.com/resizer/" rel="nofollow">http://www.webresizer.com/resizer/</a> Its an online tool, Did a pretty good job for me.

blocks|key|2081269|text|我使用三幅图像压缩器压缩图像和缩小apk.It的大小，具有良好的压缩率，易于使用，保留了图像的质量，并且在Ubuntu.Beside中也可用。我启用了ProGuard，并致力于Lint问题以减少APK大小。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2081270|entityMap|0|LINK|mutability|MUTABLE|url|http://trimage.org/^0|3|7|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I used <a href="http://trimage.org/" rel="nofollow">Trimage image compressor</a> for compressing images and reducing the size of apk.It has good compression rate,easy to use,retains the quality of image and is also available in Ubuntu.Beside this i enabled ProGuard and worked on Lint issues to reduce APK size.

blocks|key|1725708|text|以下是缩小应用程序大小的方法。下面的链接将详细说明。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725709|https://medium.com/@fahimsakri/put-your-apks-on-diet-cc3f40843c84#.m860q8s1u|offset|length|1725710|护卫|1725711|矢量图|1725712|Apk分裂|1725713|优化png图像|1725714|删除未使用的资源|1725715|9贴片图像|1725716|压缩Jpeg图像|1725717|删除调试信息|1725718|避免重复|1725719|广泛使用皮棉|1725720|尽可能重用资源|1725721|推荐媒体格式|1725722|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|24|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|F|3|G|5|6|7|1F|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1G|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1H|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1I|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1J|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1K|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1L|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1M|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1N|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1O|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1P|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|14|$15|$5|16|17|18|A|$19|C]]]]

Following are the ways to reduce the app size. In detail is explained in the following link.

<a href="https://medium.com/@fahimsakri/put-your-apks-on-diet-cc3f40843c84#.m860q8s1u" rel="nofollow">https://medium.com/@fahimsakri/put-your-apks-on-diet-cc3f40843c84#.m860q8s1u</a>

Proguard

vector drawables

Apk splits

Optimize png images

Remove unused resources

9-patch images

Compress Jpeg images

Remove debug information

Avoid duplications

Use lint extensively

Reuse resource whenever possible

Recommended Media formats

blocks|key|2081478|text|您可以通过del+R.class减少apk大小，并替换对常量的引用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081479|参见：https://github.com/mogujie/ThinRPlugin|offset|length|2081480|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/mogujie/ThinRPlugin^0|0|3|12|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

You can reduce apk size by del R.class and replaces the reference to constant. 

See this: 
<a href="https://github.com/mogujie/ThinRPlugin" rel="nofollow noreferrer">https://github.com/mogujie/ThinRPlugin</a>

blocks|key|2081496|text|APK包含移动应用程序拥有的所有东西的压缩文件，包括Java类文件、资源文件等。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081497|使APK变小的简单方法之一是减少它包含的资源的数量和大小。特别是，您可以删除您的应用程序不再使用的资源，并且可以使用可伸缩的可绘制对象来代替图像文件。|2081498|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

APK contains a zip file of all the things that your mobile application has including Java class files, resource files among others.

One of the simple ways to make your APK smaller is to reduce the number and size of the resources it contains. In particular, you can remove resources that your app no longer uses, and you can use scalable Drawable objects in place of image files.

blocks|key|2081643|text|使用MinifyEnable+true和ShrinkResources+true|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081644|MinifyEnabled将在压缩代码时减少代码。而shrinkResources则缩减了资源。|2081645|要使用ShrinkResources，必须将minifyEnbled设置为true。|2081646|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Use MinifyEnable true 
and ShrinkResources true 

MinifyEnabled will reduce your code as it compresses it.
While shrinkResources shrink the resources.

To use ShrinkResources you have to set minifyEnbled true.

blocks|key|528704|text|有几种技巧：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|528705|护卫|ordered-list-item|528706|不必要的资源|528707|Webp图像|528708|签名apk|528709|Android应用包|528710|详细说明：https://stackoverflow.com/a/63988744/13928327|offset|length|528711|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/63988744/13928327^0|0|0|0|0|0|0|5|19|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|10|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|11|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|12|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|13|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|14|8|@]|9|@$O|15|P|16|1|17]]|A|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

There are a few techniques:
<ol>
<li>Proguard</li>
<li>Unnecessary Resources</li>
<li>Webp images</li>
<li>Signed apk</li>
<li>Android App Bundle</li>
</ol>
For detailed explanation:
<a href="https://stackoverflow.com/a/63988744/13928327">https://stackoverflow.com/a/63988744/13928327</a>

blocks|key|2081570|text|使用SVG图像而不是jpg来减少apk大小。把你的图像文件放在数据库里。这样，您的应用程序的用户就可以从数据库下载它，它将大大减少应用程序的大小。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081571|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

use SVG images instead of jpg in order to reduce the apk size.
put your image files in the database .. so that the users of your app can download it from the database and it will reduce the app size dramatically..

Help!

When I install my app on the phone to test, it is showing up to be a HUGE size, 11.35 MB. It is a very simple app that lets user browse through fun-facts. The only reason I can think of is that there are 14 JPEG files in the drawables which serve as background images of the fun-facts. The average size of these is about 500 KB.

I'd like to trim the size of my app, so as not to use up the precious resources on the user's device. Other than just getting rid of the pictures, are there ways to optimize the size of apk file?

EDIT: The pictures are photos taken by me using the Android phone itself.

How to reduce App (.apk) Size

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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