Android中的TiledLayer等价物[重复]

Question

为了绘制风景、带图案的背景等，我们在 J2ME 中使用了 TiledLayer。有没有对应的android。 android 是否提供了在布局 XML 中设置此类平铺模式的选项？

Answer 1

您可以将此类用作等效的“jme 的 TiledLayer 类”：

package net.obviam.walking;

import java.util.ArrayList;

import com.kilobolt.framework.Graphics;
import com.kilobolt.framework.Image;
import com.kilobolt.framework.implementation.AndroidImage;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Rect;

public class TiledLayer {

    public static final int DIR_LEFT = 0;
    public static final int DIR_RIGHT = 1;
    public static final int DIR_UP = 2;
    public static final int DIR_DOWN = 3;

    private int cellWidth;
    private int cellHeight;
    private int yPosition = 0, xPosition = 0;
    private int[][] grid;
    private Image image;
    private Bitmap tileArray[];
    private int[] tileXPositions;
    private int[] tileYPositions;
    private ArrayList animatedTiles;
    private int numberOfTiles;
    private int numberOfColumns;
    private int numberOfRows;
    private int gridColumns;
    private int gridRows, width, height;
    int tileCounter;

    public TiledLayer(Image image, int columns, int rows, int tileWidth,
            int tileHeight, int width, int height) {
        this.grid = new int[columns][rows];
        this.gridColumns = columns;
        this.gridRows = rows;
        this.width = columns * tileWidth;
        this.height = rows * tileHeight;
        this.animatedTiles = new ArrayList();
        this.cellWidth = tileWidth;
        this.cellHeight = tileHeight;
        int r = image.getHeight() / tileHeight;
        int c = image.getWidth() / tileWidth;
        tileArray = new Bitmap[(r * c) + 1];
        setStaticTileSet(image, tileWidth, tileHeight);
    }

    public TiledLayer(Bitmap image, int columns, int rows, int tileWidth,
            int tileHeight, int width, int height) {
        this.grid = new int[columns][rows];
        this.gridColumns = columns;
        this.gridRows = rows;
        this.width = columns * tileWidth;
        this.height = rows * tileHeight;
        this.animatedTiles = new ArrayList();
        this.cellWidth = tileWidth;
        this.cellHeight = tileHeight;
        int r = image.getHeight() / tileHeight;
        int c = image.getWidth() / tileWidth;
        tileArray = new Bitmap[(r * c) + 1];
        setStaticTileSet(image, tileWidth, tileHeight);
    }

    public void setStaticTileSet(Image image, int tileWidth, int tileHeight) {
        tileArray[0] = Bitmap.createBitmap(tileWidth, tileHeight,
                Config.ARGB_4444);
        int rows = image.getHeight() / tileHeight;
        int columns = image.getWidth() / tileWidth;
        numberOfTiles = rows * columns;
        for (int i = 0; i < rows; i++) {
            yPosition = i * tileHeight;
            for (int j = 0; j < columns; j++) {
                xPosition = j * tileWidth;
                tileCounter++;
                tileArray[tileCounter] = Bitmap.createBitmap(
                        ((AndroidImage) image).bitmap, xPosition, yPosition,
                        tileWidth, tileHeight);
            }
        }
        if (gridColumns * gridRows < this.numberOfTiles) {
            // clear the grid, when there are not as many tiles as in the
            // previous set:
            for (int i = 0; i < this.grid.length; i++) {
                for (int j = 0; j < this.grid[i].length; j++) {
                    this.grid[i][j] = 0;
                }
            }
        }
    }

    public void setStaticTileSet(Bitmap image, int tileWidth, int tileHeight) {
        tileArray[0] = Bitmap.createBitmap(tileWidth, tileHeight,
                Config.ARGB_4444);
        int rows = image.getHeight() / tileHeight;
        int columns = image.getWidth() / tileWidth;
        numberOfTiles = rows * columns;
        for (int i = 0; i < rows; i++) {
            yPosition = i * tileHeight;
            for (int j = 0; j < columns; j++) {
                xPosition = j * tileWidth;
                tileCounter++;
                tileArray[tileCounter] = Bitmap.createBitmap(image, xPosition,
                        yPosition, tileWidth, tileHeight);
            }
        }

        if (gridColumns * gridRows < this.numberOfTiles) {
            // clear the grid, when there are not as many tiles as in the
            // previous set:
            for (int i = 0; i < this.grid.length; i++) {
                for (int j = 0; j < this.grid[i].length; j++) {
                    this.grid[i][j] = 0;
                }
            }
        }
    }

    public int createAnimatedTile(int staticTileIndex) {
        if (staticTileIndex >= this.numberOfTiles) {

            throw new IllegalArgumentException("invalid static tile index: "
                    + staticTileIndex + " (there are only ["
                    + this.numberOfTiles + "] tiles available.");

        }
        this.animatedTiles.add(new Integer(staticTileIndex));
        return -1 * (this.animatedTiles.size() - 1);
    }

    public void setAnimatedTile(int animatedTileIndex, int staticTileIndex) {
        if (staticTileIndex >= this.numberOfTiles) {

        }
        int animatedIndex = (-1 * animatedTileIndex) - 1;
        this.animatedTiles.set(animatedIndex, new Integer(staticTileIndex));
    }

    public int getAnimatedTile(int animatedTileIndex) {
        int animatedIndex = (-1 * animatedTileIndex) - 1;
        Integer animatedTile = (Integer) this.animatedTiles.get(animatedIndex);
        return animatedTile.intValue();
    }

    public void setCell(int col, int row, int tileIndex) {
        if (tileIndex >= this.numberOfTiles) {

            throw new IllegalArgumentException("invalid static tile index: "
                    + tileIndex + " (there are only [" + this.numberOfTiles
                    + "] tiles available.");

        }
        this.grid[col][row] = tileIndex;
    }

    public int getCell(int col, int row) {
        return this.grid[col][row];
    }

    public boolean checkTileCollision(Sprite sp, int dir, int speed) {
        int curRow, curCollumn;

        int leftTile = 0, rightTile = 0, upTile = 0, downTile = 0;

        curRow = sp.getY() / cellHeight;
        curCollumn = sp.getX() / cellWidth;

        leftTile = grid[curCollumn - 1][curRow];
        rightTile = grid[curCollumn + 1][curRow];
        upTile = grid[curCollumn][curRow - 1];
        downTile = grid[curCollumn][curRow + 1];

        if (dir == DIR_RIGHT
                && (sp.getX() + sp.getWidth() + speed) <= (curCollumn + 1)
                        * cellWidth)
            return false;
        else if (dir == DIR_RIGHT
                && ((sp.getX() + sp.getWidth() + speed)) > (curCollumn + 1)
                        * cellWidth && rightTile != 1)
            return true;
        else if (dir == DIR_LEFT
                && (sp.getX() - speed) >= (curCollumn) * cellWidth)
            return false;
        else if (dir == DIR_LEFT
                && (sp.getX() - speed) < (curCollumn) * cellWidth
                && leftTile != 1)
            return true;
        else if (dir == DIR_UP && (sp.getY() - speed) >= (curRow) * cellHeight)
            return false;
        else if (dir == DIR_UP && (sp.getY() - speed) < (curRow) * cellHeight
                && upTile != 1)
            return true;
        else if (dir == DIR_DOWN
                && (sp.getY() + sp.getHeight() + speed) <= (curRow + 1)
                        * cellHeight)
            return false;
        else if (dir == DIR_DOWN
                && (sp.getY() + sp.getHeight() + speed) > (curRow + 1)
                        * cellHeight && downTile != 1)
            return true;
        else
            return false;
    }

    public void fillCells(int col, int row, int numCols, int numRows,
            int tileIndex) {
        if (tileIndex >= this.numberOfTiles) {

            throw new IllegalArgumentException("invalid static tile index: "
                    + tileIndex + " (there are only [" + this.numberOfTiles
                    + "] tiles available.");

        }
        int endCols = col + numCols;
        int endRows = row + numRows;
        for (int i = col; i < endCols; i++) {
            for (int j = row; j < endRows; j++) {
                this.grid[i][j] = tileIndex;
            }
        }
    }

    public final int getCellWidth() {
        return this.cellWidth;
    }

    public final int getCellHeight() {
        return this.cellHeight;
    }

    public final int getColumns() {
        return this.gridColumns;
    }

    public final int getRows() {
        return this.gridRows;
    }

    public final void paint(Graphics g) {

        for (int i = 0; i < this.gridRows; i++) {
            for (int j = 0; j < this.gridColumns; j++) {
                Bitmap bmp = tileArray[grid[j][i]];
                g.drawImage(bmp, j * cellWidth, i * cellHeight);
            }
        }
    }

    public final void paint(Canvas c) {

        for (int i = 0; i < this.gridRows; i++) {
            for (int j = 0; j < this.gridColumns; j++) {
                Bitmap bmp = tileArray[grid[j][i]];
                c.drawBitmap(bmp, j * cellWidth, i * cellHeight, null);
                // g.drawImage(bmp, j*cellWidth,i*cellHeight);
            }
        }

    }
}