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'Cannot resolve symbol', 'cannot resolve method'

In the course "Build a simple Android App" - "Accessing Views in Code: Assigning Variables" I get stuck. On "AppCompatActivity" it's red and says 'Cannot resolve symbol'. On 'findViewById' and 'onCreate' and 'setContentView' it says 'cannot resolve method'.

This is my code:

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;

protected void onCreate(Bundle savedInstanceState) {

    //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() {
        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.";





Terence Davis
Terence Davis
4,819 Points

What IDE are you using? I've found that sometimes certain commands or features are depreciated in different IDE's

1 Answer

Android Studio