我一直在查看此代码超过2天，仍然无法在代码中找到任何有关它在Android上崩溃的错误。它在桌面上运行得非常好。
Android目标：4.0.3
使用Android手机：HTC Desire C
logcat的：
04-07 16:42:35.785: E/AndroidRuntime(24197): FATAL EXCEPTION: GLThread 2955
04-07 16:42:35.785: E/AndroidRuntime(24197): java.lang.ClassCastException: com.badlogic.gdx.math.Vector2 cannot be cast to java.lang.String
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.survivegameandroidtest.survive.Player.readPlayer(Player.java:191)
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.survivegameandroidtest.survive.MainMenu.loadPlayer(MainMenu.java:278)
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.survivegameandroidtest.survive.MainMenu.show(MainMenu.java:127)
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.badlogic.gdx.Game.setScreen(Game.java:62)
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.survivegameandroidtest.survive.GameHub.create(GameHub.java:12)
04-07 16:42:35.785: E/AndroidRuntime(24197): at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:334)
04-07 16:42:35.785: E/AndroidRuntime(24197): at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1463)
04-07 16:42:35.785: E/AndroidRuntime(24197): at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1224)
就像我说的，这在桌面上运行良好，但在Android上崩溃。
package com.survivegameandroidtest.survive;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
public class Player implements Serializable{
private static final long serialVersionUID = 1L;
SpriteBatch batch;
static Vector2 position = new Vector2(1,1);
Vector2 size;
Vector2 boundSize;
Vector2 boundOffset;
Texture texture;
Rectangle bounds;
String direction = "";
StringCheese cheese;
EnemyCheddarling enemy;
int health = 0, damage;
boolean alive;
private static final int col = 4, row = 4;
Animation animation;
TextureRegion[] frames;
TextureRegion currentFrame;
float stateTime;
int speed = 0;
static String name = "";
public Player(Texture texture, Vector2 position, Vector2 size, Vector2 boundSize, Vector2 boundOffset) {
this.texture = texture;
Player.position = position;
this.size = size;
this.boundOffset = boundOffset;
TextureRegion[][] tmp = TextureRegion.split(texture, texture.getWidth() / col, texture.getHeight() / row);
frames = new TextureRegion[col * row];
int index = 0;
for(int i = 0; i < row; i++) {
for(int j = 0; j < col; j++) {
frames[index++] = tmp[i][j];
}
}
animation = new Animation(1f, frames);
stateTime = 0f;
currentFrame = animation.getKeyFrame(0);
this.boundSize = boundSize;
bounds = new Rectangle(position.x + boundOffset.x, position.y + boundOffset.y, boundSize.x, boundSize.y);
health = 100;
damage = 20;
alive = true;
name = "SET YO NAME FOOL";
}
public void update() {
bounds.set(position.x + boundOffset.x, position.y + boundOffset.y, boundSize.x, boundSize.y);
if(health <= 0) {
alive = false;
}
stateTime += Gdx.graphics.getDeltaTime()*8;
if(stateTime > col) {
stateTime = 0;
}
//WASD MOVE METHOD
if(Gdx.input.isKeyPressed(Keys.W)) {
position.y += 2f;
currentFrame = animation.getKeyFrame(12 + stateTime);
direction = "up";
speed = 2;
}
if(Gdx.input.isKeyPressed(Keys.A)) {
position.x -= 2f;
currentFrame = animation.getKeyFrame(4 + stateTime);
direction = "left";
speed = 2;
}
if(Gdx.input.isKeyPressed(Keys.S)) {
position.y -= 2f;
currentFrame = animation.getKeyFrame(0 + stateTime);
direction = "down";
speed = 2;
}
if(Gdx.input.isKeyPressed(Keys.D)) {
position.x += 2f;
currentFrame = animation.getKeyFrame(8 + stateTime);
direction = "right";
speed = 2;
}
//ACCELEROMETER MOVE METHOD
if(Gdx.input.getAccelerometerX() != 1 || Gdx.input.getAccelerometerX() != 0 || Gdx.input.getAccelerometerX() != -1 || Gdx.input.getAccelerometerY() != 1 || Gdx.input.getAccelerometerY() != 0 || Gdx.input.getAccelerometerY() != -1) {
for(int rotation = 2; rotation < 5; rotation++) {
if(Gdx.input.getAccelerometerX() <= -rotation) { //DOWN
position.y += rotation;
currentFrame = animation.getKeyFrame(12 + stateTime);
direction = "down";
speed = rotation;
}
if(Gdx.input.getAccelerometerX() >= rotation) { //UP
position.y -= rotation;
currentFrame = animation.getKeyFrame(0 + stateTime);
direction = "up";
speed = rotation;
}
if(Gdx.input.getAccelerometerY() <= -rotation) { //LEFT
position.x -= rotation;
currentFrame = animation.getKeyFrame(4 + stateTime);
direction = "left";
speed = rotation;
}
if(Gdx.input.getAccelerometerY() >= rotation) { //RIGHT
position.x += rotation;
currentFrame = animation.getKeyFrame(8 + stateTime);
direction = "right";
speed = rotation;
}
}
}
}
public void draw(SpriteBatch batch) {
batch.draw(currentFrame, position.x, position.y, size.x, size.y);
}
public void collision() {
if(direction == "up") {
position.y += speed;
}
if(direction == "down") {
position.y -= speed;
}
if(direction == "left") {
position.y -= speed;
}
if(direction == "right") {
position.y += speed;
}
}
public static void savePlayer(Player playerName) throws IOException{
FileHandle file = Gdx.files.local("player.dat");
OutputStream out = null;
try{
file.writeBytes(serialize(name), false);
}catch(Exception ex){
System.out.println(ex.toString());
}finally{
if(out != null) try{out.close();} catch(Exception ex){}
}
try {
System.out.println("Saving Player" + " " + deserialize(file.readBytes()));
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static String readPlayer() throws IOException, ClassNotFoundException{
String playerName = "";
FileHandle file = Gdx.files.local("player.dat");
playerName = (String) deserialize(file.readBytes());
System.out.println("Reading Player");
return playerName;
}
private static byte[] serialize(Object obj) throws IOException {
ByteArrayOutputStream b = new ByteArrayOutputStream();
ObjectOutputStream o = new ObjectOutputStream(b);
o.writeObject(obj);
return b.toByteArray();
}
public static Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
ByteArrayInputStream b = new ByteArrayInputStream(bytes);
ObjectInputStream o = new ObjectInputStream(b);
return o.readObject();
}
//GETTERS AND SETTERS
public SpriteBatch getBatch() {
return batch;
}
public String getName() {
return name;
}
public void setName(String object) {
Player.name = object;
}
public Vector2 getBoundOffset() {
return boundOffset;
}
public void setBoundOffset(Vector2 boundOffset) {
this.boundOffset = boundOffset;
}
public int getHealth() {
return health;
}
public void setHealth(int health) {
this.health = health;
}
public int getDamage() {
return damage;
}
public void setDamage(int damage) {
this.damage = damage;
}
public boolean isAlive() {
return alive;
}
public void setAlive(boolean alive) {
this.alive = alive;
}
public String getDirection() {
return direction;
}
public void setDirection(String direction) {
this.direction = direction;
}
public StringCheese getCheese() {
return cheese;
}
public void setCheese(StringCheese cheese) {
this.cheese = cheese;
}
public Rectangle getBounds() {
return bounds;
}
public void setBounds(Rectangle bounds) {
this.bounds = bounds;
}
public Vector2 getSize() {
return size;
}
public void setSize(Vector2 size) {
this.size = size;
}
public Vector2 getBoundSize() {
return boundSize;
}
public void setBoundSize(Vector2 boundSize) {
this.boundSize = boundSize;
}
public Texture getTexture() {
return texture;
}
public void setTexture(Texture texture) {
this.texture = texture;
}
public Animation getAnimation() {
return animation;
}
public void setAnimation(Animation animation) {
this.animation = animation;
}
public TextureRegion[] getFrames() {
return frames;
}
public void setFrames(TextureRegion[] frames) {
this.frames = frames;
}
public TextureRegion getCurrentFrame() {
return currentFrame;
}
public void setCurrentFrame(TextureRegion currentFrame) {
this.currentFrame = currentFrame;
}
public float getStateTime() {
return stateTime;
}
public void setStateTime(float stateTime) {
this.stateTime = stateTime;
}
public static int getCol() {
return col;
}
public static int getRow() {
return row;
}
public void setBatch(SpriteBatch batch) {
this.batch = batch;
}
public Vector2 getPosition() {
return position;
}
public void setPosition(Vector2 position) {
Player.position = position;
}
}
在savePlayer（）中，我尝试序列化String变量'name'。
System.out.println（“Saving Player”+“”+ deserialize（file.readBytes（）））;
^这行代码在控制台中打印出“Saving Player Hosif Yimms”，并且没有一个方法返回Vector2。
ANSWER：使用FileHandle方法保存玩家名称，因为反序列化返回一个Object而不是String。
答案 0 :(得分：-1)
为什么要使用对象序列化来表示字符串？只需为您的FileHandle获取一个读/写器。 - 追逐
public static void savePlayerName(Player player) {
FileHandle file = Gdx.files.local("playername.dat");
file.writeString(player.getName(), false);
}
public static String readPlayerName() {
FileHandle file = Gdx.files.local("playername.dat");
String name = file.readString();
return name;
}