小编VIN*_*RUS的帖子

我有一个FEMALE在我的数据库中命名的表.它有ID作为Primary Key,它有一个Image列.

我的问题是如何使用SQL查询存储图像？

每当我添加com.google.firebase:firebase-firestore:19.0.0到Gradle并运行应用程序时，都会发生以下错误。

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: meter.meter, PID: 13588
    java.lang.NoSuchMethodError: No virtual method setTokenProvider(Lcom/google/firebase/internal/InternalTokenProvider;)V in class Lcom/google/firebase/FirebaseApp; or its super classes (declaration of 'com.google.firebase.FirebaseApp' appears in /data/app/meter.meter-Qosf8nECYGfI4HI93CwJrw==/split_lib_dependencies_apk.apk!classes2.dex)
        at com.google.firebase.auth.zzp.create(Unknown Source:4)
        at com.google.firebase.components.ComponentRuntime.lambda$new$0(com.google.firebase:firebase-common@@17.0.0:66)
        at com.google.firebase.components.ComponentRuntime$$Lambda$1.get(Unknown Source:4)
        at com.google.firebase.components.Lazy.get(com.google.firebase:firebase-common@@17.0.0:53)
        at com.google.firebase.components.ComponentRuntime.initializeEagerComponents(com.google.firebase:firebase-common@@17.0.0:155)
        at com.google.firebase.FirebaseApp.initializeAllApis(com.google.firebase:firebase-common@@17.0.0:642)
        at com.google.firebase.FirebaseApp.initializeApp(com.google.firebase:firebase-common@@17.0.0:358)
        at com.google.firebase.FirebaseApp.initializeApp(com.google.firebase:firebase-common@@17.0.0:321)
        at com.google.firebase.FirebaseApp.initializeApp(com.google.firebase:firebase-common@@17.0.0:305)
        at com.google.firebase.provider.FirebaseInitProvider.onCreate(com.google.firebase:firebase-common@@17.0.0:53)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1917)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1892)
        at com.google.firebase.provider.FirebaseInitProvider.attachInfo(com.google.firebase:firebase-common@@17.0.0:47)
        at android.app.ActivityThread.installProvider(ActivityThread.java:6391)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:5938)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5853)
        at android.app.ActivityThread.access$1100(ActivityThread.java:199)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) …

如何使用Mobile Vision API在图像中获取文本在屏幕上的位置,以及如何在它们周围绘制矩形？

例:

使用CameraX.LensFacing.FRONT，在模拟器上进行测试时会发生此错误

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: meter.meter, PID: 15289
    java.lang.RuntimeException: Unable to start activity ComponentInfo{meter.meter/meter.meter.CameraActivity}: java.lang.IllegalArgumentException: Suggested resolution map missing resolution for camera 1
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.IllegalArgumentException: Suggested resolution map missing resolution for camera 1
        at androidx.camera.core.Preview.onSuggestedResolutionUpdated(Preview.java:310)
        at androidx.camera.core.UseCase.updateSuggestedResolution(UseCase.java:375)
        at androidx.camera.core.CameraX.calculateSuggestedResolutions(CameraX.java:458)
        at androidx.camera.core.CameraX.bindToLifecycle(CameraX.java:144)
        at meter.meter.CameraActivity.onCreate(CameraActivity.java:68)
        at android.app.Activity.performCreate(Activity.java:7136)
        at android.app.Activity.performCreate(Activity.java:7127)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893) …

如何构建社交网络数据库结构，例如twitter我们可以在时间轴上关注用户并获取其所有推文，我已经检查了此Firestore-如何构建提要和关注系统， 但帖子中的解决方案似乎存在缺陷。

Firestore是不同的，它需要冗余数据才能有效地访问数据，但是假设我正在跟踪1000个人，并且如果我需要通过查询我正在跟踪的15个用户的数据并使用limit(10)方法来获取所有这些用户的信息，则orderBy(timeStamp)可能未读查询之间的帖子，因为我们使用来获取帖子last post timeStamp，如何在Firestore中构建社交媒体应用程序的数据

我有一个 firebase 项目，运行 firebase 函数时收到以下错误日志，下面是错误日志和代码。错误是 Cannot read property 'toDate' of undefined，将 a 转换admin.firestore.Timestamp为Date格式。如何解决这个错误

错误日志：

Unhandled error TypeError: Cannot read property 'toDate' of undefined
    at new PostTable (/srv/lib/index.js:9:34)
    at cal.then.docCollection (/srv/lib/index.js:69:39)
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:229:7)

班级

class PostTable {
    public commentCount: number
    public dateTime: number;
    public docId: string;
    public post: string;
    public userId: string;
    public userName: string;

    constructor(commentCount: number, dateTime: admin.firestore.Timestamp, docId: string, post: string, userId: string, userName: string) {
        this.commentCount = commentCount
        this.dateTime = …

我已经loop在我的代码中添加Views了Layout,下面的代码是一个Loop which is present in another loop,我有这么多的循环,Activity takes so much time to start如何处理这个？

foreach (InfoQuery item in InfoList)
        {


            if (item == "kitten")
            {
                if (!done)
                {
                    TextView view= new TextView(ApplicationContext);
                    view.LayoutParameters = mainLayout.LayoutParameters;
                    view.TextSize = TypedValue.ApplyDimension(ComplexUnitType.Sp, 3, ApplicationContext.Resources.DisplayMetrics);
                    view.SetPadding((int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 10, ApplicationContext.Resources.DisplayMetrics), 0, (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 10, ApplicationContext.Resources.DisplayMetrics), 0);
                    view.Text = item.position;
                    layout2.AddView(view,0);
                    done = true;
                }

                TextView view2= new TextView(ApplicationContext);
                view2.LayoutParameters = mainLayout.LayoutParameters;
                view2.TextSize = TypedValue.ApplyDimension(ComplexUnitType.Sp, 3, ApplicationContext.Resources.DisplayMetrics); ;
                view2.SetPadding((int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 30, …