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pyricau / Example.kt
Created Jun 4, 2021
A test coroutine dispatcher to reproduce race conditions
View Example.kt
// Here's an example based on a test that was meant to reproduce a race condition,
// where we were launching several coroutines in a specific order without realizing
// that a different order would introduce race conditions. The test code here was used to
// reproduce the exact bad order.
// Note: there are probably better approaches to doing this.
val dispatcher = QueueDelegatingTestDispatcher()
// ... TODO pass in the dispatcher to the tested code launching coroutines
View BadParcelableFix.kt
import android.os.Build.VERSION.SDK_INT
import android.os.Bundle
import android.os.Parcel
import android.util.Base64
/**
* This class implements a fix for https://issuetracker.google.com/issues/147246567
* Investigation: https://twitter.com/Piwai/status/1374129312153038849
*
* Usage:
View WindowSpy.kt
import android.annotation.TargetApi
import android.os.Build.VERSION_CODES
import android.view.View
import android.view.Window
object WindowSpy {
/**
* Installs a listener for new [Window] instances. This should only be called once, any new call
* will uninstall the previous listener.
@pyricau
pyricau / AndroidLeaks.kt
Created Jan 15, 2020
Fixing a SpellChecker leak in Android M
View AndroidLeaks.kt
/**
* Every editable TextView has an Editor instance which has a SpellChecker instance. SpellChecker
* is in charge of displaying the little squiggle spans that show typos. SpellChecker starts a
* SpellCheckerSession as needed and then closes it when the TextView is detached from the window.
* A SpellCheckerSession is in charge of communicating with the spell checker service (which lives
* in another process) through TextServicesManager.
*
* The SpellChecker sends the TextView content to the spell checker service every 400ms, ie every
* time the service calls back with a result the SpellChecker schedules another check for 400ms
* later.
View TraceTest.kt
package com.example
import kotlin.annotation.AnnotationRetention.RUNTIME
import kotlin.annotation.AnnotationTarget.FUNCTION
/**
* @see TracingRunListener
*/
@Retention(RUNTIME)
@Target(FUNCTION)
View CrashingRunListener.kt
package com.example
import android.app.Instrumentation
import android.os.Bundle
import android.util.Log
import androidx.test.internal.runner.listener.InstrumentationResultPrinter
import androidx.test.platform.app.InstrumentationRegistry
import org.junit.runner.Description
import org.junit.runner.notification.RunListener
View BugsnagLeakUploader.kt
package com.squareup.leakcanary
import android.app.Application
import com.bugsnag.android.Client
import com.bugsnag.android.MetaData
import com.bugsnag.android.Severity.ERROR
import com.squareup.leakcanary.BugsnagLeakUploader.ReportType.FAILURE
import com.squareup.leakcanary.BugsnagLeakUploader.ReportType.LEAK
import com.squareup.leakcanary.BugsnagLeakUploader.ReportType.NOT_FOUND
import com.squareup.leakcanary.BugsnagLeakUploader.ReportType.WONT_FIX_LEAK
View build.gradle
dependencies {
debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.1'
releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.6.1'
// Optional, if you use support library fragments:
debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.1'
}
View Lol.java
import java.util.concurrent.Callable;
public enum Lol implements Callable<CharSequence> {
ಠ_ಠ {
@Override public String call() {
return "Foo";
}
};