LeakCanary——直白的展现Android中的内存泄露

最新推荐文章于 2022-03-29 23:51:51 发布

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最新推荐文章于 2022-03-29 23:51:51 发布

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本文介绍了如何使用 LeakCanary 检测 Android 应用中的内存泄漏问题，并提供了详细的配置步骤及示例代码。

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LeakCanary源码github下载地址：https://github.com/square/leakcanary

之前碰到的OOM问题，终于很直白的呈现在我的眼前：我尝试了MAT，但是发现不怎么会用。直到今天终于发现了这个新工具：

当我们的App中存在内存泄露时会在通知栏弹出通知：

这里写图片描述

当点击该通知时，会跳转到具体的页面，展示出Leak的引用路径，如下图所示：

这里写图片描述

LeakCanary 可以用更加直白的方式将内存泄露展现在我们的面前。

以下是我找到的学习资料，写的非常棒：
1、LeakCanary: 让内存泄露无所遁形
2、LeakCanary 中文使用说明

AndroidStudio (官方)上使用LeakCanary 请移步：
https://github.com/square/leakcanary

Eclipse 上使用LeakCanary 请移步我的：
https://github.com/SOFTPOWER1991/LeakcanarySample-Eclipse

android studio （自己弄的）上使用LeakCanary也可以看这个：

leakcanarySample_androidStudio

leakcanary　＋　monkey 检测内存泄露　

https://testerhome.com/topics/5944

工程包括：

LeakCanary库代码
LeakCanaryDemo示例代码

使用步骤：

将LeakCanary import 入自己的工程
添加依赖：

compile project(':leakcanary')

在Application中进行配置

<code class="hljs java has-numbering"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">ExampleApplication</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Application</span> {</span>

  ......
  <span class="hljs-comment">//在自己的Application中添加如下代码</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> RefWatcher <span class="hljs-title">getRefWatcher</span>(Context context) {
    ExampleApplication application = (ExampleApplication) context
            .getApplicationContext();
    <span class="hljs-keyword">return</span> application.refWatcher;
}

  <span class="hljs-comment">//在自己的Application中添加如下代码</span>
<span class="hljs-keyword">private</span> RefWatcher refWatcher;

<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onCreate</span>() {
    <span class="hljs-keyword">super</span>.onCreate();
    ......
        <span class="hljs-comment">//在自己的Application中添加如下代码</span>
    refWatcher = LeakCanary.install(<span class="hljs-keyword">this</span>);
    ......
}

.....
}
</code>

在Activity中进行配置

<code class="hljs java has-numbering"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MainActivity</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">AppCompatActivity</span> {</span>

    ......
    <span class="hljs-annotation">@Override</span>
    <span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onCreate</span>(Bundle savedInstanceState) {
        <span class="hljs-keyword">super</span>.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
            <span class="hljs-comment">//在自己的应用初始Activity中加入如下两行代码</span>
        RefWatcher refWatcher = ExampleApplication.getRefWatcher(<span class="hljs-keyword">this</span>);
        refWatcher.watch(<span class="hljs-keyword">this</span>);

        textView = (TextView) findViewById(R.id.tv);
        textView.setOnClickListener(<span class="hljs-keyword">new</span> View.OnClickListener() {
            <span class="hljs-annotation">@Override</span>
            <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onClick</span>(View v) {
                startAsyncTask();
            }
        });

    }

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">void</span> <span class="hljs-title">async</span>() {

        startAsyncTask();
    }

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">void</span> <span class="hljs-title">startAsyncTask</span>() {
        <span class="hljs-comment">// This async task is an anonymous class and therefore has a hidden reference to the outer</span>
        <span class="hljs-comment">// class MainActivity. If the activity gets destroyed before the task finishes (e.g. rotation),</span>
        <span class="hljs-comment">// the activity instance will leak.</span>
        <span class="hljs-keyword">new</span> AsyncTask<Void, Void, Void>() {
            <span class="hljs-annotation">@Override</span>
            <span class="hljs-keyword">protected</span> Void <span class="hljs-title">doInBackground</span>(Void... params) {
                <span class="hljs-comment">// Do some slow work in background</span>
                SystemClock.sleep(<span class="hljs-number">20000</span>);
                <span class="hljs-keyword">return</span> <span class="hljs-keyword">null</span>;
            }
        }.execute();
    }


}
</code>

在AndroidMainfest.xml 中进行配置,添加如下代码

<code class="hljs xml has-numbering">        <span class="hljs-tag"><<span class="hljs-title">service
</span>            <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"com.squareup.leakcanary.internal.HeapAnalyzerService"</span>
            <span class="hljs-attribute">android:enabled</span>=<span class="hljs-value">"false"</span>
            <span class="hljs-attribute">android:process</span>=<span class="hljs-value">":leakcanary"</span> /></span>
        <span class="hljs-tag"><<span class="hljs-title">service
</span>            <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"com.squareup.leakcanary.DisplayLeakService"</span>
            <span class="hljs-attribute">android:enabled</span>=<span class="hljs-value">"false"</span> /></span>

        <span class="hljs-tag"><<span class="hljs-title">activity
</span>            <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"com.squareup.leakcanary.internal.DisplayLeakActivity"</span>
            <span class="hljs-attribute">android:enabled</span>=<span class="hljs-value">"false"</span>
            <span class="hljs-attribute">android:icon</span>=<span class="hljs-value">"@drawable/__leak_canary_icon"</span>
            <span class="hljs-attribute">android:label</span>=<span class="hljs-value">"@string/__leak_canary_display_activity_label"</span>
            <span class="hljs-attribute">android:taskAffinity</span>=<span class="hljs-value">"com.squareup.leakcanary"</span>
            <span class="hljs-attribute">android:theme</span>=<span class="hljs-value">"@style/__LeakCanary.Base"</span> ></span>
            <span class="hljs-tag"><<span class="hljs-title">intent-filter</span>></span>
                <span class="hljs-tag"><<span class="hljs-title">action</span> <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"android.intent.action.MAIN"</span> /></span>

                <span class="hljs-tag"><<span class="hljs-title">category</span> <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"android.intent.category.LAUNCHER"</span> /></span>
            <span class="hljs-tag"></<span class="hljs-title">intent-filter</span>></span>
        <span class="hljs-tag"></<span class="hljs-title">activity</span>></span>


</code><pre name="code" class="prettyprint"><code class="hljs xml has-numbering"></code><h4 id="配置leakcanary"><pre name="code" class="prettyprint"><code class="hljs xml has-numbering">monkey结合</code>