标签：Android Spinner 应用教程：数据库数据绑定 (android spinner 数据库)

Android应用程序已经成为了现代人生活中不可或缺的一部分，而应用程序中的Spinner组件也同样成为了不可或缺的一部分。Spinner组件是一种下拉列表框，用于提供多个选项以供用户选择。在Android应用程序开发中，直接在代码中添加数据源是困难的，因此使用数据库来存储这些选项的数据是一种更好的方法。这篇文章将介绍如何在Android程序中使用数据库数据绑定Spinner组件。 一、创建数据库 我们需要创建一个包含Spinner数据选项的数据库。在Android Studio中，使用SQLiteOpenHelper来创建数据库和数据表是最常见的方法。以下是创建数据库的步骤： 1.在Android Studio中打开项目，并打开app/build.gradle文件 2.添加以下代码： “` dependencies { implementation ‘com.android.support:support-v4:24.2.0’ implementation ‘com.android.support:appcompat-v7:24.2.0’ implementation ‘com.android.support:design:24.2.0’ implementation ‘com.android.support:cardview-v7:24.2.0’ implementation ‘com.android.support:recyclerview-v7:24.2.0’ implementation ‘com.android.support:gridlayout-v7:24.2.0’ implementation ‘com.android.support:support-annotations:24.2.0’ implementation ‘com.android.support:multidex:1.0.1’ implementation ‘com.android.support:percent:24.2.0’ implementation ‘com.android.support.constrnt:constrnt-layout:1.0.2’ implementation ‘com.android.support:support-vector-drawable:24.2.0’ implementation ‘com.android.support:customtabs:24.2.0’ implementation ‘com.android.support:support-v13:24.2.0’ implementation ‘com.android.support:support-fragment:24.2.0’ implementation ‘com.android.support:support-core-utils:24.2.0’ implementation ‘com.android.support:support-core-ui:24.2.0’ implementation ‘com.google.android.gms:play-services-ytics:15.0.2’ implementation ‘com.squareup.okhttp3:okhttp:3.9.1’ implementation ‘com.squareup.okhttp3:logging-interceptor:3.9.1’ implementation ‘com.jakewharton:butterknife:8.8.1’ annotationProcessor ‘com.jakewharton:butterknife-compiler:8.8.1’ implementation ‘com.android.support:preference-v7:24.2.0’ implementation ‘com.squareup.retrofit2:retrofit:2.3.0’ implementation ‘com.squareup.retrofit2:converter-gson:2.3.0’ implementation ‘com.squareup.retrofit2:adapter-rxjava:2.3.0’ implementation ‘com.squareup.retrofit2:converter-scalars:2.3.0’ implementation ‘com.github.bumptech.glide:glide:3.7.0’ implementation ‘com.google.code.gson:gson:2.8.0’ implementation files(‘libs/gurobi.jar’) implementation ‘com.google.android.gms:play-services-location:15.0.1’ implementation ‘com.google.android.gms:play-services-maps:15.0.1’ implementation ‘com.google.maps.android:android-maps-utils:0.5’ implementation ‘com.github.amlcurran.showcaseview:library:5.4.3’ implementation ‘me.dm7.barcodescanner:zbar:1.8.4’ implementation ‘com.leocardz:link-preview:2.2.1’ implementation ‘com.mikepenz:materialdrawer:6.0.6’ implementation ‘org.greenrobot:eventbus:3.0.0’ implementation ‘com.google.firebase:firebase-core:15.0.2’ implementation ‘com.google.firebase:firebase-ytics:15.0.2’ implementation ‘com.crashlytics.sdk.android:crashlytics:2.9.1’ implementation ‘com.google.android:flexbox:0.3.2’ implementation ‘com.github.bumptech.glide:glide:4.0.0’ annotationProcessor ‘com.github.bumptech.glide:compiler:4.0.0’ implementation ‘com.squareup.sqlbrite:sqlbrite:1.1.0’ implementation ‘com.squareup.leakcanary:leakcanary-android:1.5.4’ debugImplementation ‘com.squareup.leakcanary:leakcanary-android-no-op:1.5.4’ releaseImplementation ‘com.squareup.leakcanary:leakcanary-android-no-op:1.5.4’ implementation ‘com.facebook.stetho:stetho:1.5.0’ implementation ‘com.facebook.stetho:stetho-urlconnection:1.5.0’ implementation ‘com.facebook.stetho:stetho-okhttp3:1.5.0’ } “` 3.在app目录下创建一个包namedb 4.编写以下SQLiteOpenHelper的子类，实现数据库的创建 “` public class DatabaseHelper extends SQLiteOpenHelper...