Monkey脚本检测内存泄漏学习小记

1. 编写一个带有内存泄漏问题的安卓工程

1.1 布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                android:paddingBottom="@dimen/activity_vertical_margin"
                tools:context=".MainActivity">

    <TextView
        android:text="@string/hello_leak"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start"
        android:id="@+id/startBtn"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

1.2 MainActivity代码：

package com.test.tommyxie.leakcanary;

import android.os.Bundle;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button)findViewById(R.id.startBtn);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                start();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void start(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                SystemClock.sleep(20000);
            }
        }).start();
    }
}

2. 编写脚本，实时监控应用内存情况：

adb shell dumpsys meminfo com.test.tommyxie.leakcanary |grep Pss
while true
do
adb shell dumpsys meminfo com.test.tommyxie.leakcanary |grep TOTAL
sleep 3
done

3. 运行monkey命令，旋转屏幕，引发内存泄漏：

monkey -p com.test.tommyxie.leakcanary --pct-rotation 100 -v -v 10

4. 通过命令获取内存快照，并且讲文件拉到本地：

adb shell am dumpheap com.test.tommyxie.leakcanary /sdcard/leak.hprof 

adb pull /sdcard/leak.hprof

5. 通过 hprof-conv转换hprof为MAT工具可分析的格式：

hprof-conv leak.hprof new.hprof

6. 使用MAT工具打开转换后的hprof文件，即可进行分析：