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Initial memory leak case study. (#1063)
* Initial memory leak case study. * Code cleanup. * More more leak added.
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case_study/memory_leak/.gitignore

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.DS_Store
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.atom/
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.idea
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.packages
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.pub/
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build/
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ios/.generated/
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packages
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pubspec.lock
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.flutter-plugins

case_study/memory_leak/README.md

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# Using Tab Bar
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A material design widget that displays a horizontal row of tabs.
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Read [[Documentation](https://docs.flutter.io/flutter/material/TabBar-class.html)] [[Material Design Spec](https://material.io/guidelines/components/tabs.html)]
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<img src="demo_img.gif" height="600em" />
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## Getting Started
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For help getting started with Flutter, view online [documentation](http://flutter.io/).
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*.iml
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.gradle
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/local.properties
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/.idea/workspace.xml
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/.idea/libraries
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.DS_Store
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/build
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/captures
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GeneratedPluginRegistrant.java
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def localProperties = new Properties()
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def localPropertiesFile = rootProject.file('local.properties')
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if (localPropertiesFile.exists()) {
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localPropertiesFile.withInputStream { stream ->
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localProperties.load(stream)
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}
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}
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def flutterRoot = localProperties.getProperty('flutter.sdk')
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if (flutterRoot == null) {
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throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
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}
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apply plugin: 'com.android.application'
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apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
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android {
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compileSdkVersion 28
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lintOptions {
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disable 'InvalidPackage'
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}
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defaultConfig {
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// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
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applicationId "github.nisrulz.usingtabs"
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minSdkVersion 16
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targetSdkVersion 28
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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// TODO: Add your own signing config for the release build.
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// Signing with the debug keys for now, so `flutter run --release` works.
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signingConfig signingConfigs.debug
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}
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}
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}
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flutter {
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source '../..'
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}
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dependencies {
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androidTestImplementation 'com.android.support:support-annotations:28.0.0'
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androidTestImplementation 'com.android.support.test:runner:1.0.2'
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androidTestImplementation 'com.android.support.test:rules:1.0.2'
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}
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="github.nisrulz.usingtabs">
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<!-- The INTERNET permission is required for development. Specifically,
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flutter needs it to communicate with the running application
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to allow setting breakpoints, to provide hot reload, etc.
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-->
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<uses-permission android:name="android.permission.INTERNET"/>
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<!-- io.flutter.app.FlutterApplication is an android.app.Application that
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calls FlutterMain.startInitialization(this); in its onCreate method.
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In most cases you can leave this as-is, but you if you want to provide
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additional functionality it is fine to subclass or reimplement
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FlutterApplication and put your custom class here. -->
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<application android:name="io.flutter.app.FlutterApplication" android:label="using_tabs" android:icon="@mipmap/ic_launcher">
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<activity android:name=".MainActivity"
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android:launchMode="singleTop"
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android:theme="@android:style/Theme.Black.NoTitleBar"
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android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection"
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android:hardwareAccelerated="true"
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android:windowSoftInputMode="adjustResize">
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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</activity>
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</application>
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</manifest>
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package github.nisrulz.usingtabs;
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import android.os.Bundle;
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import io.flutter.app.FlutterActivity;
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import io.flutter.plugins.GeneratedPluginRegistrant;
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public class MainActivity extends FlutterActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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GeneratedPluginRegistrant.registerWith(this);
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}
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}
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buildscript {
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repositories {
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google()
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jcenter()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:3.2.1'
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}
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}
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allprojects {
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repositories {
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google()
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jcenter()
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}
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}
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rootProject.buildDir = '../build'
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subprojects {
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project.buildDir = "${rootProject.buildDir}/${project.name}"
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project.evaluationDependsOn(':app')
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}
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task clean(type: Delete) {
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delete rootProject.buildDir
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}
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#Fri Jun 23 08:50:38 CEST 2017
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
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#!/usr/bin/env bash
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##############################################################################
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##
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## Gradle start up script for UN*X
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##
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##############################################################################
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# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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DEFAULT_JVM_OPTS=""
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APP_NAME="Gradle"
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APP_BASE_NAME=`basename "$0"`
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# Use the maximum available, or set MAX_FD != -1 to use that value.
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MAX_FD="maximum"
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warn ( ) {
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echo "$*"
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}
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die ( ) {
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echo
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echo "$*"
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echo
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exit 1
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}
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# OS specific support (must be 'true' or 'false').
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cygwin=false
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msys=false
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darwin=false
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case "`uname`" in
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CYGWIN* )
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cygwin=true
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;;
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Darwin* )
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darwin=true
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;;
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MINGW* )
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msys=true
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;;
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esac
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# Attempt to set APP_HOME
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# Resolve links: $0 may be a link
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PRG="$0"
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# Need this for relative symlinks.
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while [ -h "$PRG" ] ; do
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ls=`ls -ld "$PRG"`
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link=`expr "$ls" : '.*-> \(.*\)$'`
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if expr "$link" : '/.*' > /dev/null; then
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PRG="$link"
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else
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PRG=`dirname "$PRG"`"/$link"
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fi
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done
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SAVED="`pwd`"
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cd "`dirname \"$PRG\"`/" >/dev/null
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APP_HOME="`pwd -P`"
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cd "$SAVED" >/dev/null
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CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
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# Determine the Java command to use to start the JVM.
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if [ -n "$JAVA_HOME" ] ; then
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if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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# IBM's JDK on AIX uses strange locations for the executables
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JAVACMD="$JAVA_HOME/jre/sh/java"
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else
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JAVACMD="$JAVA_HOME/bin/java"
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fi
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if [ ! -x "$JAVACMD" ] ; then
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die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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else
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JAVACMD="java"
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which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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# Increase the maximum file descriptors if we can.
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if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
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MAX_FD_LIMIT=`ulimit -H -n`
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if [ $? -eq 0 ] ; then
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if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
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MAX_FD="$MAX_FD_LIMIT"
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fi
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ulimit -n $MAX_FD
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if [ $? -ne 0 ] ; then
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warn "Could not set maximum file descriptor limit: $MAX_FD"
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fi
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else
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warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
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fi
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fi
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# For Darwin, add options to specify how the application appears in the dock
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if $darwin; then
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GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
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fi
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# For Cygwin, switch paths to Windows format before running java
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if $cygwin ; then
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APP_HOME=`cygpath --path --mixed "$APP_HOME"`
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CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
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JAVACMD=`cygpath --unix "$JAVACMD"`
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# We build the pattern for arguments to be converted via cygpath
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ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
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SEP=""
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for dir in $ROOTDIRSRAW ; do
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ROOTDIRS="$ROOTDIRS$SEP$dir"
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SEP="|"
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done
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OURCYGPATTERN="(^($ROOTDIRS))"
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# Add a user-defined pattern to the cygpath arguments
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if [ "$GRADLE_CYGPATTERN" != "" ] ; then
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OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
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fi
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# Now convert the arguments - kludge to limit ourselves to /bin/sh
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i=0
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for arg in "$@" ; do
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CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
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CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
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if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
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eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
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else
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eval `echo args$i`="\"$arg\""
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fi
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i=$((i+1))
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done
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case $i in
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(0) set -- ;;
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(1) set -- "$args0" ;;
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(2) set -- "$args0" "$args1" ;;
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(3) set -- "$args0" "$args1" "$args2" ;;
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(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
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(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
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(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
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(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
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(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
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(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
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esac
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fi
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# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
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function splitJvmOpts() {
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JVM_OPTS=("$@")
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}
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eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
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JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
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exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

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