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Android

Posted by michaeltyau
michaeltyau
8,154 Points

Windows 10 android SDK Can't find ID for findViewById(R.id./*insertIdHere*/);

From what I understand, when I create my project, I will have an ID that automatically gets assigned to the activity_main.xml file, but there isn't one. The only place I can find an ID is located in the gradle file, no where else. In this vid, I created the two variables as such:

package com.example.android.funfact;

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

public class MainActivity extends AppCompatActivity {
    private TextView mFactTextView;
    private Button  mShowFactButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mFact = (TextView) findViewById(R.id.);
    }
}

Also just to point out, I know that my current "mFact = (TextView) findViewById(R.id.);" is not complete, it's as it is due to the fact that I can't find the correct ID for it.

when I finish mFactTextView= (TextView) findViewById(R.id./this remains empty/); it does not provide valid autocomplete responses, the responses are the following: all, basic, chains, packed, parent, spread, spread_inside, wrap, class.

None of these are the id I need to get the views to talk to each other, and I feel like there are a ton of people asking the same question but not really understanding the problem.

Things I have tried: re-building the solution, cleaning the solution, reinstalling the f*cking program, restarting my computer, punching children, and eating icecream.

I will post down here my main and Manifest.xml files

Here is my manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example.android.funfact">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

Here is my main.xml (xml in my layout folder)

<?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"
    tools:context="com.example.android.funfact.MainActivity">

</android.support.constraint.ConstraintLayout>

1 Answer

michaeltyau
michaeltyau
8,154 Points

K so I figured it out. Just go into your layout.xml, make a new text view, a new button, and give them the ID's you put in your class.