assistant-android/app/src/main/java/com/gh/common/view/CardRelativeLayout.java

package com.gh.common.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

import com.gh.gamecenter.R;


public class CardRelativeLayout extends RelativeLayout {

    private Drawable mLeftDrawable, mRightDrawable, topDrawable, bottomDrawable;
    private Drawable leftTopDrawable, rightTopDrawable, leftBottomDrawable, rightBottomDrawable;

    private int mLeft, mTop, mRight, mBottom;

    private boolean isTran, isReverse;

    public CardRelativeLayout(Context context) {
        this(context, null);
    }

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

    public CardRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        setWillNotDraw(false);

        if (attrs != null) {
            TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.CardLayout);
            mLeft = ta.getDimensionPixelSize(R.styleable.CardLayout_left, 0);
            mTop = ta.getDimensionPixelSize(R.styleable.CardLayout_top, 0);
            mRight = ta.getDimensionPixelSize(R.styleable.CardLayout_right, 0);
            mBottom = ta.getDimensionPixelSize(R.styleable.CardLayout_bottom, 0);
            isTran = ta.getBoolean(R.styleable.CardLayout_tran, false);
            isReverse = ta.getBoolean(R.styleable.CardLayout_reverse, true);
            ta.recycle();
        }

        if (isTran) {
            mLeftDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_left);
            topDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_top);
            mRightDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_right);
            bottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_bottom);

            leftTopDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_left_top_square);
            rightTopDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_right_top_square);
            leftBottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_left_bottom_square);
            rightBottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_tran_right_bottom_square);
        } else {
            mLeftDrawable = ContextCompat.getDrawable(context, R.drawable.frame_left);
            topDrawable = ContextCompat.getDrawable(context, R.drawable.frame_top);
            mRightDrawable = ContextCompat.getDrawable(context, R.drawable.frame_right);
            bottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_bottom);

            leftTopDrawable = ContextCompat.getDrawable(context, R.drawable.frame_left_top_square);
            rightTopDrawable = ContextCompat.getDrawable(context, R.drawable.frame_right_top_square);
            leftBottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_left_bottom_square);
            rightBottomDrawable = ContextCompat.getDrawable(context, R.drawable.frame_right_bottom_square);
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (!isReverse) {
            if (mLeft != 0) {
                if (mLeftDrawable != null) {
                    mLeftDrawable.setBounds(0, mTop, mLeft, getHeight() - mBottom);
                    mLeftDrawable.draw(canvas);
                }
            }
            if (mRight != 0) {
                if (mRightDrawable != null) {
                    mRightDrawable.setBounds(getWidth() - mRight, mTop, getWidth(), getHeight() - mBottom);
                    mRightDrawable.draw(canvas);
                }
            }
        }
        if (mTop != 0) {
            if (isReverse) {
                if (leftBottomDrawable != null) {
                    leftBottomDrawable.setBounds(0, 0, mLeft, mTop);
                    leftBottomDrawable.draw(canvas);
                }

                if (bottomDrawable != null) {
                    bottomDrawable.setBounds(mLeft, 0, getWidth() - mRight, mTop);
                    bottomDrawable.draw(canvas);
                }

                if (rightBottomDrawable != null) {
                    rightBottomDrawable.setBounds(getWidth() - mRight, 0, getWidth(), mTop);
                    rightBottomDrawable.draw(canvas);
                }
            } else {
                if (leftTopDrawable != null) {
                    leftTopDrawable.setBounds(0, 0, mLeft, mTop);
                    leftTopDrawable.draw(canvas);
                }

                if (topDrawable != null) {
                    topDrawable.setBounds(mLeft, 0, getWidth() - mRight, mTop);
                    topDrawable.draw(canvas);
                }

                if (rightTopDrawable != null) {
                    rightTopDrawable.setBounds(getWidth() - mRight, 0, getWidth(), mTop);
                    rightTopDrawable.draw(canvas);
                }
            }
        }
        if (mBottom != 0) {
            if (isReverse) {
                if (leftTopDrawable != null) {
                    leftTopDrawable.setBounds(0, getHeight() - mBottom, mLeft, getHeight());
                    leftTopDrawable.draw(canvas);
                }

                if (topDrawable != null) {
                    topDrawable.setBounds(mLeft, getHeight() - mBottom, getWidth() - mRight, getHeight());
                    topDrawable.draw(canvas);
                }

                if (rightTopDrawable != null) {
                    rightTopDrawable.setBounds(getWidth() - mRight, getHeight() - mBottom, getWidth(), getHeight());
                    rightTopDrawable.draw(canvas);
                }
            } else {
                if (leftBottomDrawable != null) {
                    leftBottomDrawable.setBounds(0, getHeight() - mBottom, mLeft, getHeight());
                    leftBottomDrawable.draw(canvas);
                }

                if (bottomDrawable != null) {
                    bottomDrawable.setBounds(mLeft, getHeight() - mBottom, getWidth() - mRight, getHeight());
                    bottomDrawable.draw(canvas);
                }

                if (rightBottomDrawable != null) {
                    rightBottomDrawable.setBounds(getWidth() - mRight, getHeight() - mBottom, getWidth(), getHeight());
                    rightBottomDrawable.draw(canvas);
                }
            }
        }
    }

}