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Android

Ruslan T
Ruslan T
1,706 Points
Posted by Ruslan T
Ruslan T
1,706 Points

Cannot resolve "factTextView"

I copied the code as it is shown in the video, but I get this error:

Cannot resolve "factTextView". in

factTextView = findViewById(R.id.factTextView);

Here's my java code:

package com.example.admin.facts;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;

public class funnestActivity extends AppCompatActivity {

    private TextView factTextView;
    private Button factButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_funnest);
        factTextView = findViewById(R.id.factTextView);
    }
}

and here is my xml:

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#51b46d"
    tools:context=".funnestActivity">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Did you know?"
        android:textColor="#84ffffff"
        android:textSize="24dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.059"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.029" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="333dp"
        android:layout_height="249dp"
        android:layout_marginStart="12dp"
        android:layout_marginTop="64dp"
        android:background="#2e000000"
        android:padding="10dp"
        android:shadowDx="5"
        android:shadowRadius="0"
        android:text="7% of all American adults believe that chocolate milk comes from brown cows. That works out to 16.4 million people."
        android:textColor="@android:color/white"
        android:textSize="30sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2" />

    <Button
        android:id="@+id/button"
        android:layout_width="0dp"
        android:layout_height="44dp"
        android:layout_marginBottom="32dp"
        android:layout_marginEnd="38dp"
        android:layout_marginStart="38dp"
        android:background="@android:color/white"
        android:text="Give me a new fact!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent" />

</android.support.constraint.ConstraintLayout>

I've tried cleaning and rebuilding the project and checking the R resources, but nothing seems to work.

I need help fast, no one has answered my previous question for over a week and I can't continue the Android track because of this.

1 Answer

Abdallah Al Sayed Ali Saf
Abdallah Al Sayed Ali Saf
529 Points
Abdallah Al Sayed Ali Saf
Abdallah Al Sayed Ali Saf
529 Points

First factTextView id doesn't exist mate you have to put it in the id property of a TextView

     ```xml

       <TextView
    android:id="@+id/factTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Did you know?"
    android:textColor="#84ffffff"
    android:textSize="24dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_bias="0.059"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.029" />

      ```

Secondly cast :

      ```java

             factTextView = (TextView)findViewById(R.id.factTextView);

      ```