如何快速定位Android启动耗时问题
本篇内容主要讲解“如何快速定位Android启动耗时问题”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“如何快速定位Android启动耗时问题”吧!
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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 1,5471,1,1338 2,17582,1,1338 3,17558,1,1338 4,17560,1,379 5,17562,1,160 6,17563,1,17 6,17566,1,20 6,17568,1,20 5,17569,1,20 4,17573,1,56 5,17575,1,21 5,17576,1,5 5,17578,1,10 4,17580,1,102 ","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
到此，相信大家对“如何快速定位Android启动耗时问题”有了更深的了解，不妨来实际操作一番吧！这里是创新互联网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
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