概述
android 的2048小游戏完整实现：GridLayout布局（android 4.0及以上）。
曾经做过一个2048的算法题，学了几天android,认为能够实现个安卓版的。也就动手写了个。
包括的东西：
GridLayout布局
在activity中动态加入view组件
推断用户在屏幕滑动的的方向
2048算法（參考之前用C++写的,写的还算通俗易懂吧，http://blog.csdn.net/liang5630/article/details/39895087）。
不多说，先上图：
package com.example.y2048;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.GridLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.y2048.map.Direction;
import com.example.y2048.map.Maps;
public class MainActivity extends Activity {
private String tag = "GridLayoutActivity";
GridLayout gridLayout;
float startX = 0, startY = 0, endX, endY;
Maps maps = new Maps();
private TextView score;
private TextView best;
@SuppressLint("NewApi")
void init() {
// 获取View对象
gridLayout = (GridLayout) findViewById(R.id.root);
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
Button bn = new Button(this);
bn.setClickable(false);
bn.setText("");
// 设置该button的字号大小
bn.setTextSize(30);
bn.setWidth(120);
bn.setHeight(120);
// 指定该组件所在的行
GridLayout.Spec rowSpec = GridLayout.spec(i + 2);
// 指定该组件所在的列
GridLayout.Spec columnSpec = GridLayout.spec(j);
String msg = "rowSpec:" + (i + 2) + " - columnSpec:" + (j);
Log.d(tag, msg);
GridLayout.LayoutParams params = new GridLayout.LayoutParams(
rowSpec, columnSpec);
// 指定该组件占满容器
// params.setGravity(Gravity.FILL);
gridLayout.addView(bn, params);
maps.addButton(i, j, bn);
}
}
score = (TextView) findViewById(R.id.score);
score.setText("0");
best = (TextView) findViewById(R.id.best);
maps.setScore(score);
maps.setBest(best);
maps.init();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
// System.out.println("触摸");
int action = event.getAction();
if (action == MotionEvent.ACTION_DOWN) {
startX = event.getX();
startY = event.getY();
} else if (action == MotionEvent.ACTION_UP) {
endX = event.getX();
endY = event.getY();
int direction = GetSlideDirection(startX, startY, endX, endY);
// System.out.println(startX+","+startY+"|"+endX+","+endY+" "+direction);
// Toast.makeText(this, direction+"", Toast.LENGTH_LONG).show();
boolean gameOver = maps.Slide(direction);
if (gameOver) {
if(maps.getScore()>maps.getBestScore()){
Toast.makeText(this, "恭喜超过最佳记录！。！", Toast.LENGTH_SHORT).show();
maps.setBestScore(maps.getScore());
best.setText(maps.getScore()+"");
}else{
Toast.makeText(this, "GameOver", Toast.LENGTH_SHORT).show();
}
}
}
return super.dispatchTouchEvent(event);
}
// 返回角度
private double GetSlideAngle(float dx, float dy) {
return Math.atan2(dy, dx) * 180 / Math.PI;
}
// 依据起点和终点返回方向 1：向上。2：向下，3：向左，4：向右,0：未滑动
private int GetSlideDirection(float startX, float startY, float endX,
float endY) {
float dy = startY - endY;
float dx = endX - startX;
int result = Direction.NONE;
// 假设滑动距离太短
if (Math.abs(dx) < 2 && Math.abs(dy) < 2) {
return result;
}
double angle = GetSlideAngle(dx, dy);
if (angle >= -45 && angle < 45) {
return Direction.RIGHT;
} else if (angle >= 45 && angle < 135) {
return Direction.UP;
} else if (angle >= -135 && angle < -45) {
return Direction.DOWN;
} else if ((angle >= 135 && angle <= 180)
|| (angle >= -180 && angle < -135)) {
return Direction.LEFT;
}
return result;
}
public void reset(View view) {
maps.init();
}
}package com.example.y2048.map;
public interface Direction {
//1：向上，2：向下，3：向左，4：向右,0：未滑动
static final int LEFT=3;
static final int RIGHT=4;
static final int UP=1;
static final int DOWN=2;
static final int NONE=0;
}
package com.example.y2048.map;
import java.util.Random;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class Maps {
private TextView score;
private TextView best;
private Button[][] maps = new Button[4][4];
public void addButton(int i, int j, Button btn) {
maps[i][j] = btn;
}
private void swapText(Button btn1, Button btn2) {
CharSequence text = btn1.getText();
btn1.setText(btn2.getText());
btn2.setText(text);
}
void up_remove_blank() {
int i, j, k;
for (j = 0; j < 4; j++) {
for (i = 1; i < 4; i++) {
k = i;
while (k - 1 >= 0
&& maps[k - 1][j].getText().toString().length() == 0) {// 上面的那个为空
swapText(maps[k][j], maps[k - 1][j]);
k--;
}
}
}
}
void down_remove_blank() {
int i, j, k;
for (j = 0; j < 4; j++) {
for (i = 2; i >= 0; i--) {
k = i;
while (k + 1 <= 3
&& maps[k + 1][j].getText().toString().length() == 0) {// 上面的那个为空
swapText(maps[k][j], maps[k + 1][j]);
k++;
}
}
}
}
void left_remove_blank() {
int i, j, k;
for (i = 0; i < 4; i++) {
for (j = 1; j < 4; j++) {
k = j;
while (k - 1 >= 0
&& maps[i][k - 1].getText().toString().length() == 0) {// 上面的那个为空
swapText(maps[i][k], maps[i][k - 1]);
k--;
}
}
}
}
void right_remove_blank() {
int i, j, k;
for (i = 0; i < 4; i++) {
for (j = 2; j >= 0; j--) {
k = j;
while (k + 1 <= 3
&& maps[i][k + 1].getText().toString().length() == 0) {// 上面的那个为空
swapText(maps[i][k], maps[i][k + 1]);
k++;
}
}
}
}
void left() {
int i, j;
for (i = 0; i < 4; i++) {
for (j = 0; j < 3; j++) {
String s1 = maps[i][j].getText().toString();
String s2 = maps[i][j + 1].getText().toString();
if (s1.equals(s2) && !s1.equals("")) {
// maps[i][j]+=maps[i][j+1];
Integer sum = Integer.valueOf(maps[i][j].getText()
.toString());
sum += Integer.valueOf(maps[i][j + 1].getText().toString());
int total = Integer.valueOf(score.getText().toString());
score.setText(String.valueOf(sum + total));
maps[i][j].setText(sum.toString());
maps[i][j + 1].setText("");
left_remove_blank();
}
}
}
}
void right() {
int i, j;
for (i = 0; i < 4; i++) {
for (j = 3; j >= 1; j--) {
String s1 = maps[i][j].getText().toString();
String s2 = maps[i][j - 1].getText().toString();
if (s1.equals(s2) && !s1.equals("")) {
// maps[i][j]+=maps[i][j-1];
// maps[i][j-1]=0;
Integer sum = Integer.valueOf(maps[i][j].getText()
.toString());
sum += Integer.valueOf(maps[i][j - 1].getText().toString());
int total = Integer.valueOf(score.getText().toString());
score.setText(String.valueOf(sum + total));
maps[i][j].setText(sum.toString());
maps[i][j - 1].setText("");
right_remove_blank();
}
}
}
}
void up() {
int i, j;
for (j = 0; j < 4; j++) {// 每一列
for (i = 0; i < 3; i++) {
String s1 = maps[i][j].getText().toString();
String s2 = maps[i + 1][j].getText().toString();
if (s1.equals(s2) && !s1.equals("")) {
// maps[i][j]=maps[i][j]+maps[i+1][j];
// maps[i+1][j]=0;
Integer sum = Integer.valueOf(maps[i][j].getText()
.toString());
sum += Integer.valueOf(maps[i + 1][j].getText().toString());
int total = Integer.valueOf(score.getText().toString());
score.setText(String.valueOf(sum + total));
maps[i][j].setText(sum.toString());
maps[i + 1][j].setText("");
// 移除空格
up_remove_blank();
}
}
}
}
void down() {
int i, j;
for (j = 0; j < 4; j++) {// 每一列
for (i = 3; i >= 1; i--) {
String s1 = maps[i][j].getText().toString();
String s2 = maps[i - 1][j].getText().toString();
if (s1.equals(s2) && !s1.equals("")) {
// maps[i][j]=maps[i][j]+maps[i-1][j];
// maps[i-1][j]=0;
Integer sum = Integer.valueOf(maps[i][j].getText()
.toString());
sum += Integer.valueOf(maps[i - 1][j].getText().toString());
int total = Integer.valueOf(score.getText().toString());
score.setText(String.valueOf(sum + total));
maps[i][j].setText(sum.toString());
maps[i - 1][j].setText("");
// 移除空格
down_remove_blank();
}
}
}
}
private void addNumber() {
Random random = new Random();
int x = random.nextInt(4);
int y = random.nextInt(4);
int number = random.nextInt(20);//出现2的概率为95% 4的概率5%
if(number==0) number=4;
else number=2;
while (maps[x][y].getText().toString().length() != 0) {
x = random.nextInt(4);
y = random.nextInt(4);
}
maps[x][y].setText(number + "");
}
public void init() {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
maps[i][j].setText("");
}
}
score.setText("0");
addNumber();
addNumber();
}
private boolean isFull() {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
if (maps[i][j].getText().toString().length() == 0) {
return false;
}
}
}
return true;
}
public boolean Slide(int direction) {
if (direction == Direction.LEFT) {
left_remove_blank();
left();
if (isFull())
return true;
else {
addNumber();
}
} else if (direction == Direction.RIGHT) {
right_remove_blank();
right();
if (isFull())
return true;
else {
addNumber();
}
} else if (direction == Direction.UP) {
up_remove_blank();
up();
if (isFull())
return true;
else {
addNumber();
}
} else if (direction == Direction.DOWN) {
down_remove_blank();
down();
if (isFull())
return true;
else {
addNumber();
}
}
return false;
}
public void setScore(TextView score) {
this.score = score;
}
public void setBest(TextView best) {
this.best = best;
best.setText(getBestScore()+"");
}
public int getScore(){
return Integer.valueOf(score.getText().toString());
}
public int getBestScore(){
SharedPreferences sp = best.getContext().getSharedPreferences("bestScore.txt", Context.MODE_PRIVATE);
int bestScore=sp.getInt("bestScore", 0);
return bestScore;
}
public void setBestScore(int score){
SharedPreferences sp = best.getContext().getSharedPreferences("bestScore.txt", Context.MODE_PRIVATE);
Editor edit = sp.edit();
edit.putInt("bestScore", score);
edit.commit();
}
}
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="4"
android:rowCount="6"
tools:ignore="NewApi" >
<TextView
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:gravity="center"
android:text="Score:" />
<TextView
android:id="@+id/score"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:gravity="center"
android:text="Score:" />
<TextView
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:text="Best:" />
<TextView
android:id="@+id/best"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center" />
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_columnSpan="4"
android:onClick="reset"
android:text="reset" />
</GridLayout>转载请注明出处：http://blog.csdn.net/liang5630/article/details/41251549
源代码及apk下载：
最后
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