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Errors show when I try to preview my app on my android devices


Errors show when I try to preview my app on my android devices

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Errors show when I try to preview my app on my android devices
Tag : android , By : user160048
Date : November 26 2020, 06:18 AM

this one helps. I'm trying to create an app using Nativescript Sidekick using angular/typescript. , Add enableProdMode() in main.ts file in the project.
Like:-
import { platformNativeScriptDynamic } from "nativescript-angular/platform";
import { AppModule } from "./app/app.module";
import { enableProdMode } from "@angular/core";

enableProdMode();
platformNativeScriptDynamic().bootstrapModule(AppModule);
import { Component } from "@angular/core";

@Component({
  moduleId: module.id,
  selector: "ns-app",
  templateUrl: "app.component.html"
})
export class AppComponent { }
import { Component } from "@angular/core";

@Component({
  moduleId: module.id,
  selector: "ns-login",
  templateUrl: "./login.component.html"
})
export class LoginComponent { }

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Android Studio 3.1 layout preview does not show preview for some layouts


Tag : android , By : Will
Date : March 29 2020, 07:55 AM
I hope this helps you . After many failed attempts and submitting it to Android Studio bug tracker and giving it an another try. I found that it was due to a missing "+".
Sample layout to demonstrate the issue
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/rightTextView"
        style="@style/Base.TextAppearance.AppCompat.Medium"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="24dp"
        android:padding="12dp"
        android:text="This is a sample TextView at Right"
        app:layout_constraintStart_toEndOf="@+id/leftTextView" />

    <TextView
        android:id="@id/leftTextView"
        style="@style/Base.TextAppearance.AppCompat.Large"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="12dp"
        android:text="Left"
        android:textColor="@color/colorAccent" />

</android.support.constraint.ConstraintLayout>

Android xml Preview showing Null in devices spinner


Tag : android , By : T11M
Date : March 29 2020, 07:55 AM
like below fixes the issue Devices shown as null in android preview xml layout mode, and no layout is shown , see attached Screen Shot .. This is not rendering problem, i tried to clean, rebuild, invalidate caches/restart but i did not worked for me , also tried to update support design libraries in gradle based on other answers on stackoverflow but it also not worked for me
 Android Studio > File > Sync Project with Gradle Files 

Camera Preview Stretched on Few Android Devices


Tag : android , By : Ansari
Date : March 29 2020, 07:55 AM

Android Camera 2 preview size and devices aspect ratio


Tag : android , By : Goeran
Date : March 29 2020, 07:55 AM

A successful build is needed before the preview can be displayed or can not show content in preview in Android studio 4.


Tag : android , By : Zelos
Date : September 26 2020, 10:00 AM
I think the issue was by ths following , I have tried to open the preview but can not open it. , try this:
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            Greeting("Android")
        }
    }

    @Composable
    fun Greeting(name: String) {
        Text (text = "Hello $name!")
    }
}
@Preview
@Composable
fun PreviewGreeting() {
    Greeting("Android")
}
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