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Android Build a Simple Android App Basic Android Programming Accessing Views in Code: Assigning Variables

Posted by Simon Ekizean
Simon Ekizean
963 Points

Cannot resolve method 'findViewByID(int)'

In this video we try to assign a value to a variable. As the title says, when I write this line:

    mFactTextView = findViewByID(R.id.factTextView);

"findViewByID" is marked red and when the cursor points at it, it says

"Cannot resolve method 'findViewByID(int)'".

2 Answers

Jason Anello
PLUS
Jason Anello
Courses Plus Student 94,610 Points
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Simon,

It should be findViewById You had an uppercase 'D' for 'ID'

Simon Ekizean
Simon Ekizean
963 Points
Simon Ekizean
Simon Ekizean
963 Points

Hi,

Thank you. I tried that too but it didn't help.

Here is the code in MainActivity.java:

package com.example.simon.id8;

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

public class MainActivity extends AppCompatActivity { // Declare our View variables private TextView mFactTextView; private Button mShowFactButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Assign the Views from the Layour file to the corresponding variables
   mFactTextView = findViewById(R.id.factTextView);
   mShowFactButton = findViewById(R.id.showFactButton);

    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //The button was clicked, so update the fact TextView with a new fact
            String fact = "Ostriches can run faster than horses.";
            mFactTextView.

        }
    };

    mShowFactButton.setOnClickListener(listener);

}

}

It's not only that method that cannot be resolved. "AppCompatActivity" is also red as well as "onCreate" and "setContentView".