//分别获取空方块的位置与点击方块的位置，通过x,y两边都差1的方式

GameData mNullGameData = (GameData) iv_null_ImageView.getTag();这里空指针？

GameData mGameData = (GameData) mImageView.getTag();

package com.example.puzzlegame;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.GridLayout;

import android.widget.ImageView;

import android.widget.Toast;

public class MainActivity extends Activity {

/**利用二维数组创建若干游戏小方块*/

private ImageView[][] iv_game_arr = new ImageView[4][4];

/** 游戏主界面  */

private GridLayout gl_main_game;

//当前空方块的实例的保存

private ImageView iv_null_ImageView;

@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //初始化游戏的若干个小方块

        Bitmap bigBm = ((BitmapDrawable)getResources().getDrawable(R.drawable.g4)).getBitmap();//获取一张大图

        int tuWandH = bigBm.getWidth()/4;//每个游戏小方块的宽和高

        for (int i = 0; i < iv_game_arr.length; i++) {

for (int j = 0; j < iv_game_arr[0].length; j++) {

Bitmap bm = Bitmap.createBitmap(bigBm, j * tuWandH, i * tuWandH, tuWandH, tuWandH);//根据行和列来切成若干个游戏小图片

iv_game_arr[i][j] = new ImageView(this);

//设置每一个游戏小方块的图案

iv_game_arr[i][j].setImageBitmap(bm);

//设置方块之间的间距

iv_game_arr[i][j].setPadding(1, 1, 1, 1);

iv_game_arr[i][j].setTag(new GameData(i, j, bm));//绑定自定义的数据

iv_game_arr[i][j].setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

boolean flag = isHasByNullImageView((ImageView) v);

Toast.makeText(MainActivity.this, "位置是否存在:"+flag, Toast.LENGTH_SHORT).show();

}

});

}

}

        //初始化游戏主界面，并添加若干个小方块

        gl_main_game = (GridLayout) findViewById(R.id.gl_main_game);

        for (int i = 0; i < iv_game_arr.length; i++) {

for (int j = 0; j < iv_game_arr[0].length; j++) {

gl_main_game.addView(iv_game_arr[i][j]);

}

}

        //设置最后一个方块为空的

        setNullImageView(iv_game_arr[3][3]);

    }

//设置某个方块为空方块

public void setNullImageView(ImageView mImageView){

mImageView.setImageBitmap(null);

}

//判断当前点击的方块，是否与空方块的位置关系是相邻关系s

public boolean isHasByNullImageView(ImageView mImageView){

//分别获取空方块的位置与点击方块的位置，通过x,y两边都差1的方式

GameData mNullGameData = (GameData) iv_null_ImageView.getTag();

GameData mGameData = (GameData) mImageView.getTag();

if (mNullGameData.y==mGameData.y && mGameData.x+1==mNullGameData.x) { //当前点击的方块在空方块的上边

return true;

}else if(mNullGameData.y==mGameData.y && mGameData.x-1==mNullGameData.x){//当前点击的方块在空方块的下边

return true;

}else if(mNullGameData.y==mGameData.y+1 && mGameData.x==mNullGameData.x){//当前点击的方块在空方块的左边

return true;

}else if(mNullGameData.y==mGameData.y-1 && mGameData.x==mNullGameData.x){//当前点击的方块在空方块的右边

return true;

}

return false;

}

//每个游戏小方块上要绑定的数据

class GameData{

//每个小方块的实际位置

public int x = 0;

//每个小方块的实际位置

public int y = 0;

//每个小方块的图片

public Bitmap bm;

//每个小方块的图片的位置

public int p_x = 0;

//每个小方块的图片的位置

public int p_y = 0;

public GameData(int x, int y, Bitmap bm){

this.x = x;

this.y = y;

this.bm = bm;

this.p_x = x;

this.p_y = y;

}

}

}