Android Open Source - spots Dropdown View

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License

The source code is released under:

MIT License

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Java Source Code

package com.dcc.matc89.spots.view;
/*from   ww w .ja va 2  s . c  o m*/
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.PopupWindow;

public class DropdownView extends ImageView {

  private View mView;
  private OnClickListener mOnClickListener;
  private PopupWindow mPopupWindow;

  public DropdownView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }

  public DropdownView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public DropdownView(Context context) {
    super(context);
    init();
  }

  private void init() {
    super.setOnClickListener(onClickListener);
  }

  private OnClickListener onClickListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
      toggleDropDown();
      if(mOnClickListener != null)
        mOnClickListener.onClick(v);
    }
  };

  public void setContentView(View view) {
    mView = view;
    if(mPopupWindow != null){
      if(mPopupWindow.isShowing())
        mPopupWindow.dismiss();
      mPopupWindow.setContentView(view);
    }
  }

  @Override
  public void setOnClickListener(OnClickListener l) {
    mOnClickListener = l;
  }

  public void toggleDropDown() {
    PopupWindow popupWindow = getPopupWindow();
    if(!popupWindow.isShowing())
      popupWindow.showAsDropDown(this);
    else
      popupWindow.dismiss();
  }

  private PopupWindow getPopupWindow() {
    if(mPopupWindow == null) {
      mPopupWindow = new PopupWindow(mView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);
      mPopupWindow.setOutsideTouchable(true);
      mPopupWindow.setFocusable(true);
      mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.WHITE));
    }
    return mPopupWindow;
  }
  
  @Override
  protected void onDetachedFromWindow() {
    if(mPopupWindow != null && mPopupWindow.isShowing())
      mPopupWindow.dismiss();
    super.onDetachedFromWindow();
  }
}

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