src/com/android/dialer/list/RemoveView.java

package com.android.dialer.list;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.DragEvent;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.android.dialer.R;

public class RemoveView extends FrameLayout {

    DragDropController mDragDropController;
    TextView mRemoveText;
    ImageView mRemoveIcon;
    int mUnhighlightedColor;
    int mHighlightedColor;
    Drawable mRemoveDrawable;

    public RemoveView(Context context) {
      super(context);
    }

    public RemoveView(Context context, AttributeSet attrs) {
        this(context, attrs, -1);
    }

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

    @Override
    protected void onFinishInflate() {
        mRemoveText = (TextView) findViewById(R.id.remove_view_text);
        mRemoveIcon = (ImageView) findViewById(R.id.remove_view_icon);
        final Resources r = getResources();
        mUnhighlightedColor = r.getColor(R.color.remove_text_color);
        mHighlightedColor = r.getColor(R.color.remove_highlighted_text_color);
        mRemoveDrawable = r.getDrawable(R.drawable.ic_remove);
    }

    public void setDragDropController(DragDropController controller) {
        mDragDropController = controller;
    }

    @Override
    public boolean onDragEvent(DragEvent event) {
        final int action = event.getAction();
        switch (action) {
            case DragEvent.ACTION_DRAG_ENTERED:
                setAppearanceHighlighted();
                break;
            case DragEvent.ACTION_DRAG_EXITED:
                setAppearanceNormal();
                break;
            case DragEvent.ACTION_DRAG_LOCATION:
                if (mDragDropController != null) {
                    mDragDropController.handleDragHovered(this, (int) event.getX(),
                            (int) event.getY());
                }
                break;
            case DragEvent.ACTION_DROP:
                if (mDragDropController != null) {
                    mDragDropController.handleDragFinished((int) event.getX(), (int) event.getY(),
                            true);
                }
                setAppearanceNormal();
                break;
        }
        return true;
    }

    private void setAppearanceNormal() {
        mRemoveText.setTextColor(mUnhighlightedColor);
        mRemoveIcon.setColorFilter(mUnhighlightedColor);
        invalidate();
    }

    private void setAppearanceHighlighted() {
        mRemoveText.setTextColor(mHighlightedColor);
        mRemoveIcon.setColorFilter(mHighlightedColor);
        invalidate();
    }
}