Implement App Search

FastAppSearch/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

FastAppSearch/app/.gitignore

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+/build

FastAppSearch/app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.jetbrains.kotlin.android)
+    id("com.google.devtools.ksp")
+    kotlin("kapt")
+}
+
+android {
+    namespace = "com.dezzy.fastappsearch"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.dezzy.fastappsearch"
+        minSdk = 24
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.7"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+
+    implementation(libs.androidx.appsearch)
+    kapt(libs.androidx.appsearch.compiler)
+    implementation(libs.androidx.appsearch.local.storage)
+}

FastAppSearch/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

FastAppSearch/app/src/androidTest/java/com/dezzy/fastappsearch/ExampleInstrumentedTest.kt

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+package com.dezzy.fastappsearch
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.dezzy.fastappsearch", appContext.packageName)
+    }
+}

FastAppSearch/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.FastAppSearch"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.FastAppSearch">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

FastAppSearch/app/src/main/java/com/dezzy/fastappsearch/AppSearchManager.kt

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+package com.dezzy.fastappsearch
+
+import android.content.Context
+import androidx.appsearch.app.AppSearchSession
+import androidx.appsearch.app.PutDocumentsRequest
+import androidx.appsearch.app.SearchSpec
+import androidx.appsearch.app.SetSchemaRequest
+import androidx.appsearch.localstorage.LocalStorage
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+class AppSearchManager(
+    private val appContext: Context
+) {
+    private var session: AppSearchSession? = null
+    suspend fun init() {
+        withContext(Dispatchers.IO) {
+            val sessionFuture = LocalStorage.createSearchSessionAsync(
+                LocalStorage.SearchContext.Builder(
+                    appContext,
+                    "todo"
+                ).build()
+            )
+
+            val setSchemaRequest = SetSchemaRequest.Builder()
+                .addDocumentClasses(Todo::class.java)
+                .build()
+
+            session = sessionFuture.get()
+
+            session?.setSchemaAsync(setSchemaRequest)
+        }
+    }
+
+    suspend fun addTodos(todos: List<Todo>): Boolean {
+        return withContext(Dispatchers.IO) {
+            session?.putAsync(
+                PutDocumentsRequest.Builder()
+                    .addDocuments(todos)
+                    .build()
+            )?.get()?.isSuccess == true
+        }
+    }
+
+    suspend fun searchTodos(query: String): List<Todo> {
+        return withContext(Dispatchers.IO) {
+            val searchSpec = SearchSpec.Builder()
+                .setSnippetCount(10)
+                .addFilterNamespaces("my_todos")
+                .setRankingStrategy(SearchSpec.RANKING_STRATEGY_USAGE_COUNT)
+                .build()
+            val result = session?.search(
+                query,
+                searchSpec
+            ) ?: return@withContext emptyList()
+
+            val page = result.nextPageAsync.get()
+
+            page.mapNotNull {
+                if(it.genericDocument.schemaType == Todo::class.java.simpleName) {
+                    it.getDocument(Todo::class.java)
+                } else null
+            }
+        }
+    }
+
+    fun closeSession() {
+        session?.close()
+        session = null
+    }
+}

FastAppSearch/app/src/main/java/com/dezzy/fastappsearch/MainActivity.kt

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+package com.dezzy.fastappsearch
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.dezzy.fastappsearch.ui.theme.FastAppSearchTheme
+
+class MainActivity : ComponentActivity() {
+
+    private val viewModel: MainViewModel by viewModels(
+        factoryProducer = {
+            object : ViewModelProvider.Factory {
+                override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                    return MainViewModel(AppSearchManager(applicationContext)) as T
+                }
+            }
+        }
+    )
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            FastAppSearchTheme {
+                val state = viewModel.state
+                Column(modifier = Modifier.fillMaxSize()) {
+                    TextField(
+                        value = state.searchText,
+                        onValueChange = viewModel::onSearchQueryChange,
+                        modifier = Modifier
+                            .padding(8.dp)
+                            .fillMaxWidth(),
+                            placeholder = {
+                                Text(text = "enter search")
+                            }
+                    )
+                    LazyColumn(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .weight(1f),
+                        contentPadding = PaddingValues(8.dp)
+                    ) {
+                        items(state.todos) {todo ->
+                            TodoItem(
+                                todo = todo,
+                                onDoneChange = { isDone ->
+                                    viewModel.onDoneChange(todo, isDone)
+                                }
+                            )
+                        }
+
+                    }
+                }
+            }
+        }
+    }
+
+    @Composable
+    private fun TodoItem(
+        todo: Todo,
+        onDoneChange: (Boolean) -> Unit,
+        modifier: Modifier = Modifier
+    ) {
+        Row(
+            modifier = modifier
+                .fillMaxWidth()
+                .padding(8.dp)
+        ) {
+           Column(modifier = Modifier.weight(1f)) {
+               Text(text = todo.title, fontSize = 16.sp)
+               Text(text = todo.description, fontSize = 10.sp)
+           }
+           Checkbox(checked = todo.isDone, onCheckedChange = onDoneChange)
+        }
+    }
+}