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
