BootstrapCircleThumbnail.java

package cn.coderss.ui;

import cn.coderss.edu.R;
import cn.coderss.util.ImageUtils;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;


public class BootstrapCircleThumbnail extends FrameLayout
{
    private static final int PADDING_SMALL = 4;
    private static final int PADDING_MEDIUM = 4;
    private static final int PADDING_LARGE = 6;
    private static final int PADDING_XLARGE = 8;

    private static final int SIZE_SMALL = 48; //dp total size (outer circle)
    private static final int SIZE_MEDIUM = 80;//dp
    private static final int SIZE_LARGE = 112;//dp
    private static final int SIZE_XLARGE = 176;//dp
    private static final int SIZE_DEFAULT = SIZE_MEDIUM;

    private static final String SMALL = "small";
    private static final String MEDIUM = "medium";
    private static final String LARGE = "large";
    private static final String XLARGE = "xlarge";

    private LinearLayout container;
    private LinearLayout placeholder;
    private ImageView image;
    private TextView dimensionsLabel;
    private String size = MEDIUM;
    private boolean minimal = false;//minimal means display just the image, no padding
    private String text = "";
    private int imageWidth = SIZE_DEFAULT;
    private int imageHeight = SIZE_DEFAULT;
    private int padding = 0;

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

    public BootstrapCircleThumbnail(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        initialise(attrs);
    }

    public BootstrapCircleThumbnail(Context context)
    {
        super(context);
        initialise(null);
    }

    private void initialise( AttributeSet attrs )
    {
        LayoutInflater inflator = (LayoutInflater)getContext().getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);


        TypedArray a = getContext().obtainStyledAttributes(attrs,
                R.styleable.BootstrapCircleThumbnail);


        int imageDrawable = 0;

        if(a.getString(R.styleable.BootstrapCircleThumbnail_bct_image) != null)
        {
            imageDrawable = a.getResourceId(R.styleable.BootstrapCircleThumbnail_bct_image, 0);

        }

        if(a.getString(R.styleable.BootstrapCircleThumbnail_android_text) != null)
        {
            text = a.getString(R.styleable.BootstrapCircleThumbnail_android_text);
        }

        if(a.getString(R.styleable.BootstrapCircleThumbnail_bct_size) != null)
        {
            this.size = a.getString(R.styleable.BootstrapCircleThumbnail_bct_size);
        }

        if(a.getString(R.styleable.BootstrapCircleThumbnail_bct_minimal) != null)
        {
            this.minimal = a.getBoolean(R.styleable.BootstrapCircleThumbnail_bct_minimal, false);
        }

        a.recycle();

        View v = inflator.inflate(R.layout.bootstrap_thumbnail_circle, null, false);
        dimensionsLabel = (TextView) v.findViewById(R.id.dimensionsLabel);
        container = (LinearLayout) v.findViewById(R.id.container);
        placeholder = (LinearLayout) v.findViewById(R.id.placeholder);
        image = (ImageView) v.findViewById(R.id.image);
        float scale = getResources().getDisplayMetrics().density;



        //small image
        if(this.size.equals(SMALL))
        {
            padding = PADDING_SMALL;
            imageWidth = SIZE_SMALL;
            imageHeight = SIZE_SMALL;

        }
        else if(this.size.equals(MEDIUM))
        {
            padding = PADDING_MEDIUM;
            imageWidth = SIZE_MEDIUM;
            imageHeight = SIZE_MEDIUM;
        }
        else if(this.size.equals(LARGE))
        {
            padding = PADDING_LARGE;
            imageWidth = SIZE_LARGE;
            imageHeight = SIZE_LARGE;
        }
        else if(this.size.equals(XLARGE))
        {
            padding = PADDING_XLARGE;
            imageWidth = SIZE_XLARGE;
            imageHeight = SIZE_XLARGE;
        }
        //no valid size is given, set image to default size
        else
        {
            padding = PADDING_MEDIUM;
            imageWidth = SIZE_DEFAULT;
            imageHeight = SIZE_DEFAULT;
        }

        //convert padding to pixels
        DisplayMetrics displayMetrics = getContext().getResources().getDisplayMetrics();
        int paddingPX = (int)((padding * scale) + 0.5);

        //convert image size to pixels
        int imageSizeWidthPX = (int)((imageWidth * scale) + 0.5);
        int imageSizeHeightPX = (int)((imageHeight * scale) + 0.5);

        //make inner image smaller to compensate for the padding so that entire circle including padding equals the size
        //ex. small image = 48dp, small padding = 4dp, inner image = 48 - (4 * 2) = 40
        if(this.minimal == false)
        {
            imageSizeWidthPX = imageSizeWidthPX - (paddingPX * 2);
            imageSizeHeightPX = imageSizeHeightPX - (paddingPX * 2);

            this.container.setPadding(paddingPX, paddingPX, paddingPX, paddingPX);
            container.setBackgroundResource(R.drawable.thumbnail_circle_container);
        }
        else
        {
            container.setBackgroundResource(R.drawable.thumbnail_circle_minimal);
        }

        //if no image is given
        if(imageDrawable == 0)
        {
            this.image.setVisibility(View.GONE);
            placeholder.setLayoutParams(new LinearLayout.LayoutParams(imageSizeWidthPX, imageSizeHeightPX));
            placeholder.setPadding(paddingPX, paddingPX, paddingPX, paddingPX);

            //set placeholder image
            placeholder.setBackgroundResource(R.drawable.thumbnail_circle);

            this.dimensionsLabel.setText(text);
        }
        else
        {
            placeholder.setPadding(0, 0, 0, 0);
            this.dimensionsLabel.setVisibility(View.GONE);
            Bitmap bitmap = BitmapFactory.decodeResource(getContext().getResources(), imageDrawable);

            Bitmap roundBitmap = ImageUtils.getCircleBitmap(bitmap, imageSizeWidthPX, imageSizeHeightPX);
            image.setImageBitmap(roundBitmap);
        }

        this.addView(v);
    }

    public void setImage(int drawable)
    {
        Bitmap bitmap = BitmapFactory.decodeResource(getContext().getResources(), drawable);

        float scale = getResources().getDisplayMetrics().density;

        //convert image size to pixels
        int widthPX = (int)((this.imageWidth * scale) + 0.5);
        int heightPX = (int)((this.imageHeight * scale) + 0.5);

        int paddingPX = (int)((this.padding * scale) + 0.5);

        if(this.minimal == false)
        {
            widthPX = widthPX - (paddingPX * 2);
            heightPX = heightPX - (paddingPX * 2);
        }

        Bitmap roundBitmap = ImageUtils.getCircleBitmap(bitmap, widthPX, heightPX);
        image.setImageBitmap(roundBitmap);

        invalidate();
        requestLayout();
    }
}