Butter Knife and Material Design Library usage

Question

I am using Butter Knife in my project along with the Material Design Libraries for the UI.

When attempting to create buttons using the Material Design Library i get a 'Class Cast Exception' because of the usage of Butter Knife.

Is there a way to fix this?

MainActivity.Java

@Bind(R.id.switch1) Switch switch;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ButterKnife.bind(this);
}

XML Switch Layout

<com.gc.materialdesign.views.Switch
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/switch1"
    android:layout_centerHorizontal="true" />

Errors

Caused by: java.lang.RuntimeException: Unable to bind views for com.example.MainActivty

Caused by: java.lang.ClassCastException:com.gc.materialdesign.views.Switch cannot be cast to android.widget.Switch

Are you sure that you imported the correct `Switch` in your MainActivity.java? — Gaëtan, Feb 20 '16 at 18:08

score 1 · Accepted Answer · answered Feb 20 '16 at 18:08

1

You are importing the wrong Switch - instead of importing android.widget.Switch, you need to import com.gc.materialdesign.views.Switch and use that class when defining your switch variable.

answered Feb 20 '16 at 18:08

ianhanniballake

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I literally just figured it out, i thought the library was already imported! Stupid me. Thank you for for your answer i really appreciate it. – Perfect_Comment Feb 20 '16 at 18:09

score 0 · Answer 2 · answered Feb 20 '16 at 18:10

0

Remove the line

import android.widget.Switch;

and replace it with

import com.gc.materialdesign.views.Switch;

You've simply chosen to import the wrong Switch class.

answered Feb 20 '16 at 18:10

Lars Blumberg

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Butter Knife and Material Design Library usage

2 Answers2