One minute to quickly locate the time consuming problem of Android startup
- 2021-12-13 09:40:41
- OfStack
Preface
By default, Tencent Matrix cannot monitor the time-consuming method of Application cold start. This paper introduces how to transform Matrix to support the time-consuming method of cold start monitoring. Let you start the Caton pulse for App in 1 minute.
1. Access Tencent Matrix
1.1 Configure the Matrix version number to rely on in gradle. properties in the root directory of your project, such as:
MATRIX_VERSION=1.0.0
1.2 Add Matrix dependencies to the build. gradle file in the root directory of your project, such as:
dependencies {
classpath ("com.tencent.matrix:matrix-gradle-plugin:${MATRIX_VERSION}") { changing = true }
}
1.3 Add Matrix module dependencies to the app/build. gradle file, such as:
dependencies {
implementation group: "com.tencent.matrix", name: "matrix-android-lib", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-android-commons", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-trace-canary", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-resource-canary-android", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-resource-canary-common", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-io-canary", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-sqlite-lint-android-sdk", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-battery-canary", version: MATRIX_VERSION, changing: true
implementation group: "com.tencent.matrix", name: "matrix-hooks", version: MATRIX_VERSION, changing: true
}
apply plugin: 'com.tencent.matrix-plugin'
matrix {
trace {
enable = true //if you don't want to use trace canary, set false
baseMethodMapFile = "${project.buildDir}/matrix_output/Debug.methodmap"
blackListFile = "${project.projectDir}/matrixTrace/blackMethodList.txt"
}
}
1.4 Implement PluginListener and receive the data processed by Matrix, such as:
class MatrixListener(context: Context?) : DefaultPluginListener(context) {
companion object {
const val TAG: String = "Matrix.TestPluginListener"
}
override fun onReportIssue(issue: Issue) {
super.onReportIssue(issue)
MatrixLog.e(TAG, issue.toString())
}
}
1.5 Implementation of dynamic configuration interface, can modify Matrix internal parameters. In sample-android we have a simple dynamic interface instance DynamicConfigImplDemo. java, which parameters corresponding to key in the file MatrixEnum, excerpt part of the example as follows:
class MatrixConfig : IDynamicConfig {
val isFPSEnable: Boolean
get() = true
val isTraceEnable: Boolean
get() = true
val isMatrixEnable: Boolean
get() = true
override fun get(key: String, defStr: String): String {
// for Activity leak detect
if (ExptEnum.clicfg_matrix_resource_detect_interval_millis.name == key || ExptEnum.clicfg_matrix_resource_detect_interval_millis_bg.name == key) {
Log.d(
"DynamicConfig",
"Matrix.ActivityRefWatcher: clicfg_matrix_resource_detect_interval_millis 10s"
)
return TimeUnit.SECONDS.toMillis(5).toString()
}
if (ExptEnum.clicfg_matrix_resource_max_detect_times.name == key) {
Log.d(
"DynamicConfig",
"Matrix.ActivityRefWatcher: clicfg_matrix_resource_max_detect_times 5"
)
return 3.toString()
}
return defStr
}
override fun get(key: String, defInt: Int): Int {
//TODO here return default value which is inside sdk, you can change it as you wish. matrix-sdk-key in class MatrixEnum.
if (MatrixEnum.clicfg_matrix_resource_max_detect_times.name == key) {
MatrixLog.i(TAG, "key:$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 Initialize Matrix by selecting the location where the program starts. For example, in the inheritance class of Application, the core logic of Init is as follows:
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. Modify the Application subclass
2.1 Analog Application Caton
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 () calls the Caton method
override fun onCreate() {
A()
}
2.3 mHandler for ActivityThread by reflection
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 Transfer the original onCreate method call to an anonymous inner class call
inner class ApplicationTask : Runnable {
override fun run() {
A()
}
}
2.5 Override the Application onCreate method
override fun onCreate() {
super.onCreate()
// Focus
mHandler.postAtFrontOfQueue(ApplicationTask())
}
3. Running, fast positioning
3.1 keyword "Trace_EvilMethod" lookup log
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 Parsing Log Print Caton Stack
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