Android Studio - App Crashes

Question

How can I change or add more code to make this app to stop crashing? This activity is called "WhatBin", I simply wanted to make a button listen to when a person would click and change a text view. (VIEW PICTURES BELOW FOR MORE DETAILS.)

PICTURES: https://i.sstatic.net/iK1b3.jpg

package com.example.tiffany.whatbin;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

public class WhatBin extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_what_bin);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

 final TextView txt_answer = (TextView) findViewById(R.id.txt_answer);

 Button btn_go = (Button) findViewById(R.id.btn_go);

    btn_go.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            txt_answer.setText("Marker - Recycle Bin");

        }
    });



    };
}

HERE IS THE XML FILE:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent"
android:layout_height="match_parent"     
android:layout_padddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_what_bin" tools:context=".WhatBin">

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Go"
    android:id="@+id/btn.go"
    android:layout_marginBottom="113dp"
    android:textColor="@drawable/abc_dialog_material_background_dark"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textEdit"
    android:layout_alignBottom="@+id/btn.go"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@+id/btn.go"
    android:layout_toStartOf="@+id/btn.go" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="@string/instructiontext"
    android:id="@+id/textinstruc"
    android:layout_below="@+id/textEdit"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@+id/btn.go"
    android:layout_toStartOf="@+id/btn.go" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/txt.1"
    android:id="@+id/txt.answer"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

</RelativeLayout>

Answer 1

UPDATE

You are currently using abc_dialog_material_background_dark as textcolor. As you can see in the source of this resource, it is basically a shape. And, shape cannot be used for textcolor.

---

In your XML file at line 17 you have used a color. That color is of wrong type. My guess, you have used a drawable instead of a color.

Post your activity_what_bin.xml for further explanation.