SQL example for Android Basics with Compose

Author: OwenScott-GDS

app/build.gradle

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 The Android Open Source Project
+ * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,21 +16,25 @@
 
 plugins {
     id 'com.android.application'
-    id 'kotlin-android'
+    id 'org.jetbrains.kotlin.android'
     id 'kotlin-kapt'
 }
 
 android {
-    compileSdkVersion 33
+    namespace 'com.example.sqldemo'
+    compileSdk 32
 
     defaultConfig {
-        applicationId "com.example.sqlbasics"
-        minSdkVersion 19
-        targetSdkVersion 33
+        applicationId "com.example.sqldemo"
+        minSdk 21
+        targetSdk 32
         versionCode 1
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary true
+        }
     }
 
     buildTypes {
@@ -46,23 +50,36 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion '1.1.1'
+    }
+    packagingOptions {
+        resources {
+            excludes += '/META-INF/{AL2.0,LGPL2.1}'
+        }
+    }
 }
 
 dependencies {
     def room_version = '2.4.3'
 
     implementation "androidx.room:room-runtime:$room_version"
     kapt "androidx.room:room-compiler:$room_version"
-
-    // optional - Kotlin Extensions and Coroutines support for Room
     implementation "androidx.room:room-ktx:$room_version"
 
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4'
-    implementation 'androidx.core:core-ktx:1.9.0'
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'com.google.android.material:material:1.7.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.core:core-ktx:1.7.0'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
+    implementation 'androidx.activity:activity-compose:1.3.1'
+    implementation "androidx.compose.ui:ui:$compose_ui_version"
+    implementation "androidx.compose.ui:ui-tooling-preview:$compose_ui_version"
+    implementation 'androidx.compose.material:material:1.1.1'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
-}
+    androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_ui_version"
+    debugImplementation "androidx.compose.ui:ui-tooling:$compose_ui_version"
+    debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_ui_version"
+}

app/src/main/assets/database/sql_basics.db renamed to app/database/sql_basics.db

@@ -0,0 +1,24 @@
+package com.example.sqldemo
+
+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.example.sqldemo", appContext.packageName)
+    }
+}

app/src/androidTest/java/com/example/sqldemo/ExampleInstrumentedTest.kt

@@ -1,35 +1,32 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!--
-     Copyright (C) 2021 The Android Open Source Project
-     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.
--->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.sqlbasics">
+    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.SQLBasics">
-        <activity android:name=".MainActivity"
-            android:exported="true">
+        android:theme="@style/Theme.SQLDemo"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.SQLDemo">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
         </activity>
     </application>
 
-</manifest>
+</manifest>

app/src/main/AndroidManifest.xml

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 The Android Open Source Project
+ * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,16 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.example.sqlbasics
+
+package com.example.sqldemo
 
 import android.content.Context
 import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
 
-@Database(entities = arrayOf(CaliforniaPark::class), version = 1)
+@Database(entities = arrayOf(Email::class), version = 1)
 abstract class AppDatabase: RoomDatabase() {
-    abstract fun californiaParkDao(): CaliforniaParkDao
+    abstract fun emailDao(): EmailDao
 
     companion object {
         @Volatile
@@ -37,12 +38,12 @@ abstract class AppDatabase: RoomDatabase() {
                     AppDatabase::class.java,
                     "app_database"
                 )
-                    .createFromAsset("database/sql_basics.db")
+                    .createFromAsset("database/Email.db")
                     .build()
                 INSTANCE = instance
 
                 instance
             }
         }
     }
-}
+}

app/src/main/assets/database/Email.db

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 The Android Open Source Project
+ * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,19 +13,20 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.example.sqlbasics
+
+package com.example.sqldemo
 
 import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.PrimaryKey
 
-@Entity(tableName = "park")
-data class CaliforniaPark(
+@Entity(tableName = "email")
+data class Email(
     @PrimaryKey(autoGenerate = true) val id: Int,
-    @ColumnInfo(name = "name") val name: String,
-    @ColumnInfo(name = "city") val city: String,
-    @ColumnInfo(name = "area_acres") val acres: Int,
-    @ColumnInfo(name = "park_visitors") val visitors: Int?,
-    @ColumnInfo(name = "established") val established: Long,
-    @ColumnInfo(name = "type") val type: String
+    @ColumnInfo(name = "subject") val subject: String,
+    @ColumnInfo(name = "sender") val sender: String,
+    @ColumnInfo(name = "folder") val folder: String,
+    @ColumnInfo(name = "starred") val starred: Boolean,
+    @ColumnInfo(name = "read") val read: Boolean,
+    @ColumnInfo(name = "received") val received: Int
 )

app/src/main/java/com/example/sqlbasics/AppDatabase.kt renamed to app/src/main/java/com/example/sqldemo/AppDatabase.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 The Android Open Source Project
+ * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,16 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.example.sqlbasics
+
+package com.example.sqldemo
 
 import androidx.room.Dao
-import androidx.room.Insert
 import androidx.room.Query
 
 @Dao
-interface CaliforniaParkDao {
-    @Insert
-    suspend fun insertAll(parks: List<CaliforniaPark>)
-    @Query("SELECT * FROM park")
-    suspend fun getAll(): List<CaliforniaPark>
+interface EmailDao {
+    @Query("SELECT * FROM email")
+    suspend fun getAll(): List<Email>
 }

app/src/main/java/com/example/sqlbasics/CaliforniaPark.kt renamed to app/src/main/java/com/example/sqldemo/Email.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.sqldemo
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import com.example.sqldemo.ui.theme.SQLDemoTheme
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        GlobalScope.launch {
+            AppDatabase.getDatabase(applicationContext).emailDao().getAll()
+        }
+        setContent {
+            SQLDemoTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colors.background
+                ) {
+                    Box(
+                        modifier = Modifier.fillMaxSize(),
+                        contentAlignment = Alignment.Center
+                        ) {
+                        Text("The database is ready!")
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/sqlbasics/CaliforniaParkDao.kt renamed to app/src/main/java/com/example/sqldemo/EmailDao.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 The Android Open Source Project
+ * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,19 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.example.sqlbasics
 
-import androidx.appcompat.app.AppCompatActivity
-import android.os.Bundle
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
+package com.example.sqldemo.ui.theme
 
-class MainActivity : AppCompatActivity() {
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
-        GlobalScope.launch {
-            AppDatabase.getDatabase(applicationContext).californiaParkDao().getAll()
-        }
-    }
-}
+import androidx.compose.ui.graphics.Color
+
+val Purple200 = Color(0xFFBB86FC)
+val Purple500 = Color(0xFF6200EE)
+val Purple700 = Color(0xFF3700B3)
+val Teal200 = Color(0xFF03DAC5)

app/src/main/java/com/example/sqldemo/MainActivity.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.sqldemo.ui.theme
+
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.Shapes
+import androidx.compose.ui.unit.dp
+
+val Shapes = Shapes(
+    small = RoundedCornerShape(4.dp),
+    medium = RoundedCornerShape(4.dp),
+    large = RoundedCornerShape(0.dp)
+)