A checkable ImageView for Android

CheckableImageView.java

import android.content.Context;
import android.support.annotation.Nullable;
import android.support.v7.widget.AppCompatImageView;
import android.util.AttributeSet;
import android.widget.Checkable;

public class CheckableImageView extends AppCompatImageView implements Checkable {

  private boolean checked;
  private boolean broadcasting;

  private OnCheckedChangeListener onCheckedChangeListener;

  private static final int[] CHECKED_STATE_SET = {
      android.R.attr.state_checked
  };

  public interface OnCheckedChangeListener {
    void onCheckedChanged(CheckableImageView checkableImageView, boolean isChecked);
  }

  public CheckableImageView(final Context context) {
    this(context, null);
  }

  public CheckableImageView(final Context context, final AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public CheckableImageView(final Context context, final AttributeSet attrs, final int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    setOnClickListener(v -> toggle());
  }

  @Override public int[] onCreateDrawableState(final int extraSpace) {
    final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
    if (isChecked()) {
      mergeDrawableStates(drawableState, CHECKED_STATE_SET);
    }
    return drawableState;
  }

  @Override public void toggle() {
    setChecked(!checked);
  }

  @Override public boolean isChecked() {
    return checked;
  }

  @Override public void setChecked(final boolean checked) {
    if (this.checked != checked) {
      this.checked = checked;
      refreshDrawableState();

      // Avoid infinite recursions if setChecked() is called from a listener
      if (broadcasting) {
        return;
      }
      broadcasting = true;
      if (onCheckedChangeListener != null) {
        onCheckedChangeListener.onCheckedChanged(this, checked);
      }
      broadcasting = false;
    }
  }

  public void setOnCheckedChangeListener(@Nullable final OnCheckedChangeListener onCheckedChangeListener) {
    this.onCheckedChangeListener = onCheckedChangeListener;
  }
}