前言

Tencent Matrix默认无法监测Application冷启动的耗时方法，本文介绍了如何改造Matrix支持冷启动耗时方法监测。让你一分钟就能给App启动卡顿号脉。

1. 接入Tencent Matrix

1.1 在你项目根目录下的 gradle.properties 中配置要依赖的 Matrix 版本号，如：

MATRIX_VERSION=1.0.0

1.2 在你项目根目录下的 build.gradle 文件添加 Matrix 依赖，如：

dependencies {

      classpath ("com.tencent.matrix:matrix-gradle-plugin:${MATRIX_VERSION}") { changing = true }

  }

1.3 在 app/build.gradle 文件中添加 Matrix 各模块的依赖，如：

  dependencies {

    implementation group: "com.tencent.matrix", name: "matrix-android-lib", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-android-commons", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-trace-canary", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-resource-canary-android", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-resource-canary-common", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-io-canary", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-sqlite-lint-android-sdk", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-battery-canary", version: MATRIX_VERSION, changing: true

    implementation group: "com.tencent.matrix", name: "matrix-hooks", version: MATRIX_VERSION, changing: true

  }


  apply plugin: 'com.tencent.matrix-plugin'

  matrix {

    trace {

        enable = true	//if you don't want to use trace canary, set false

        baseMethodMapFile = "${project.buildDir}/matrix_output/Debug.methodmap"

        blackListFile = "${project.projectDir}/matrixTrace/blackMethodList.txt"

    }

  }

1.4 实现 PluginListener，接收 Matrix 处理后的数据, 如：

class MatrixListener(context: Context?) : DefaultPluginListener(context) {

    companion object {

        const val TAG: String = "Matrix.TestPluginListener"

    }


    override fun onReportIssue(issue: Issue) {

        super.onReportIssue(issue)

        MatrixLog.e(TAG, issue.toString())


    }

}

1.5 实现动态配置接口， 可修改 Matrix 内部参数. 在 sample-android 中 我们有个简单的动态接口实例DynamicConfigImplDemo.java, 其中参数对应的 key 位于文件 MatrixEnum中， 摘抄部分示例如下：

  class MatrixConfig : IDynamicConfig {

    val isFPSEnable: Boolean

        get() = true

    val isTraceEnable: Boolean

        get() = true

    val isMatrixEnable: Boolean

        get() = true


    override fun get(key: String, defStr: String): String {


        // for Activity leak detect

        if (ExptEnum.clicfg_matrix_resource_detect_interval_millis.name == key || ExptEnum.clicfg_matrix_resource_detect_interval_millis_bg.name == key) {

            Log.d(

                "DynamicConfig",

                "Matrix.ActivityRefWatcher: clicfg_matrix_resource_detect_interval_millis 10s"

            )

            return TimeUnit.SECONDS.toMillis(5).toString()

        }

        if (ExptEnum.clicfg_matrix_resource_max_detect_times.name == key) {

            Log.d(

                "DynamicConfig",

                "Matrix.ActivityRefWatcher: clicfg_matrix_resource_max_detect_times 5"

            )

            return 3.toString()

        }

        return defStr

    }


    override fun get(key: String, defInt: Int): Int {

        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.

        if (MatrixEnum.clicfg_matrix_resource_max_detect_times.name == key) {

            MatrixLog.i(TAG, "key:$key, before change:$defInt, after change, value:2")

            return 2 //new value

        }

        if (MatrixEnum.clicfg_matrix_trace_fps_report_threshold.name == key) {

            return 10000

        }

        if (MatrixEnum.clicfg_matrix_trace_fps_time_slice.name == key) {

            return 12000

        }

        if (ExptEnum.clicfg_matrix_trace_app_start_up_threshold.name == key) {

            return 3000

        }

        return if (ExptEnum.clicfg_matrix_trace_evil_method_threshold.name == key) {

            200

        } else defInt

    }


    override fun get(key: String, defLong: Long): Long {

        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.

        if (MatrixEnum.clicfg_matrix_trace_fps_report_threshold.name == key) {

            return 10000L

        }

        if (MatrixEnum.clicfg_matrix_resource_detect_interval_millis.name == key) {

            MatrixLog.i(TAG, "$key, before change:$defLong, after change, value:2000")

            return 2000

        }

        return defLong

    }


    override fun get(key: String, defBool: Boolean): Boolean {

        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.

        return defBool

    }


    override fun get(key: String, defFloat: Float): Float {

        //TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.

        return defFloat

    }


    companion object {

        private const val TAG = "Matrix.DynamicConfigImplDemo"

    }

}

1.6 选择程序启动的位置对 Matrix 进行初始化，如在 Application 的继承类中， Init 核心逻辑如下：

  Matrix.Builder builder = new Matrix.Builder(application); // build matrix

  builder.patchListener(new TestPluginListener(this)); // add general pluginListener

  DynamicConfigImplDemo dynamicConfig = new DynamicConfigImplDemo(); // dynamic config


  // init plugin 

  IOCanaryPlugin ioCanaryPlugin = new IOCanaryPlugin(new IOConfig.Builder()

                    .dynamicConfig(dynamicConfig)

                    .build());

  //add to matrix               

  builder.plugin(ioCanaryPlugin);


  //init matrix

  Matrix.init(builder.build());


  // start plugin 

  ioCanaryPlugin.start();

2. 改造Application子类

2.1 模拟Application卡顿

private fun A() {

        B()

        H()

        L()

        SystemClock.sleep(800)

    }


    private fun B() {

        C()

        G()

        SystemClock.sleep(200)

    }


    private fun C() {

        D()

        E()

        F()

        SystemClock.sleep(100)

    }


    private fun D() {

        SystemClock.sleep(20)

    }


    private fun E() {

        SystemClock.sleep(20)

    }


    private fun F() {

        SystemClock.sleep(20)

    }


    private fun G() {

        SystemClock.sleep(20)

    }


    private fun H() {

        SystemClock.sleep(20)

        I()

        J()

        K()

    }


    private fun I() {

        SystemClock.sleep(20)

    }


    private fun J() {

        SystemClock.sleep(6)

    }


    private fun K() {

        SystemClock.sleep(10)

    }



    private fun L() {

        SystemClock.sleep(10000)

    }

2.2 Application.onCreate()调用卡顿方法

override fun onCreate() {

  A()

}

2.3 反射获取ActivityThread的mHandler

override fun attachBaseContext(base: Context?) {

      super.attachBaseContext(base)

      println("zijiexiaozhan MyApp attachBaseContext")

      time1 = SystemClock.uptimeMillis()

      time3 = System.currentTimeMillis()


      try {

          val forName = Class.forName("android.app.ActivityThread")

          val field = forName.getDeclaredField("sCurrentActivityThread")

          field.isAccessible = true

          val activityThreadValue = field[forName]

          val mH = forName.getDeclaredField("mH")

          mH.isAccessible = true

          val handler = mH[activityThreadValue]

          mHandler = handler as Handler

      } catch (e: Exception) {

      }

}

2.4 将原来的onCreate的方法调用转入匿名内部类调用

inner class ApplicationTask : Runnable {

    override fun run() {

        A()

    }

}

2.5 重写Application onCreate方法

override fun onCreate() {

    super.onCreate()

    //重点

    mHandler.postAtFrontOfQueue(ApplicationTask())

}

3.运行，快速定位

3.1 关键字"Trace_EvilMethod"查找日志

tag[Trace_EvilMethod]type[0];key[null];content[{"machine":"MIDDLE","cpu_app":0,"mem":3822452736,"mem_free":1164132,"detail":"NORMAL","cost":1344,"usage":"0.37%","scene":"default","stack":"0,1048574,1,1344\n1,5471,1,1338\n2,17582,1,1338\n3,17558,1,1338\n4,17560,1,379\n5,17562,1,160\n6,17563,1,17\n6,17566,1,20\n6,17568,1,20\n5,17569,1,20\n4,17573,1,56\n5,17575,1,21\n5,17576,1,5\n5,17578,1,10\n4,17580,1,102\n","stackKey":"17558|","tag":"Trace_EvilMethod","process":"com.peter.viewgrouptutorial","time":1624837969986}]

3.2 解析日志 打印卡顿堆栈

android.os.Handler dispatchMessage 1344

.com.peter.viewgrouptutorial.MyApp$ApplicationTask run 1338

..com.peter.viewgrouptutorial.MyApp access$A 1338

...com.peter.viewgrouptutorial.MyApp A 1338

....com.peter.viewgrouptutorial.MyApp B 379

.....com.peter.viewgrouptutorial.MyApp C 160

......com.peter.viewgrouptutorial.MyApp D 17

......com.peter.viewgrouptutorial.MyApp E 20

......com.peter.viewgrouptutorial.MyApp F 20

.....com.peter.viewgrouptutorial.MyApp G 20

....com.peter.viewgrouptutorial.MyApp H 56

.....com.peter.viewgrouptutorial.MyApp I 21

.....com.peter.viewgrouptutorial.MyApp J 5

.....com.peter.viewgrouptutorial.MyApp K 10

....com.peter.viewgrouptutorial.MyApp L 102