add flutter

OnTime_Merchant_live/lib/flexbox-layout/demo-playground/build.gradle

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion rootProject.ext.compileSdkVersion
+
+    defaultConfig {
+        applicationId "com.google.android.apps.flexbox"
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            shrinkResources true
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation project(":flexbox")
+    implementation "androidx.annotation:annotation:${rootProject.androidxAnnotationVersion}"
+    implementation "androidx.appcompat:appcompat:${rootProject.androidxAppCompatVersion}"
+    implementation "androidx.preference:preference:${rootProject.androidxPreferenceVersion}"
+    implementation "com.google.android.material:material:${rootProject.materialVersion}"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
+
+    testImplementation "junit:junit:${rootProject.ext.junitVersion}"
+
+    androidTestImplementation "androidx.annotation:annotation:${rootProject.androidxAnnotationVersion}"
+    androidTestImplementation "androidx.test:runner:${rootProject.androidxTestVersion}"
+    androidTestImplementation "androidx.test:rules:${rootProject.androidxTestVersion}"
+    androidTestImplementation "androidx.test.espresso:espresso-core:${rootProject.androidxEspressoVersion}"
+}