How to implement a github file in Android Studio?

I applied here in this case and it looks like this: first I added the dependency in the gradle (build.gradle (Module app)) as described in the "README"

compile 'me.grantland:autofittextview:0.2.+'

Then I took the sample from the sample folder:

XML:

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <EditText
        android:id="@+id/input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="input_hi"
        android:singleLine="true"
        android:text="There's a lady who's sure all that glitters is gold
And she's buying a stairway to heaven" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="label_normal" />

    <TextView
        android:id="@+id/output"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="example"
        android:textSize="50sp" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="label_autofit" />

    <me.grantland.widget.AutofitTextView
        android:id="@+id/output_autofit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:singleLine="true"
        android:text="example"
        android:textSize="50sp"
        autofit:minTextSize="8sp" />
</LinearLayout>

and MainActivity:

public class MainActivity extends Activity {

private TextView mOutput, mAutofitOutput;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mOutput = (TextView)findViewById(R.id.output);
    mAutofitOutput = (TextView)findViewById(R.id.output_autofit);

    ((EditText)findViewById(R.id.input)).addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            // do nothing
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            mOutput.setText(charSequence);
            mAutofitOutput.setText(charSequence);
        }

        @Override
        public void afterTextChanged(Editable editable) {
            // do nothing
        }
    });
  }
}

and it looks like this: The first is normal and underneath with autofit