java - Gdx运行时异常: Error reading file

Question

我正在使用 libgdx 学习和编写 Android 游戏，并且我已经在这个错误上停留了很长一段时间了。我附上以下内容

1. 代码。
2. 我用来访问 Assets 的命令。
3. 包含我在 Android 上调试代码时出现的错误的屏幕截图。
4. 我的 Package Explorer 的屏幕截图。
5. 我尝试过让代码正常运行的所有可能的组合。

1.代码

package com.me.mygdxgame;

import com.badlogic.gdx.Gdx;  
import com.badlogic.gdx.assets.AssetErrorListener;  
import com.badlogic.gdx.assets.AssetManager;  
import com.badlogic.gdx.graphics.Texture;  
import com.badlogic.gdx.graphics.Texture.TextureFilter;    
import com.badlogic.gdx.graphics.g2d.TextureAtlas;  
import com.badlogic.gdx.utils.Disposable;

public class Gameassetloader implements Disposable, AssetErrorListener {

public static final String TAG = Gameassetloader.class.getName();
public static Gameassetloader instance = new Gameassetloader();
private AssetManager assetManager;

/** Load the appropriate texture for the respective entities **/
public AssetCharacter boy;
public AssetRock rock;
public AssetShield shield;

/** singleton: prevent instantiation from other classes **/

private Gameassetloader(){}
public void init(AssetManager assetManager)
 {
    this.assetManager = assetManager;

    //set asset manager error handler
    assetManager.setErrorListener(this);

    //load texture atlas
    assetManager.load(Gameconstants.TEXTURE_ATLAS_OBJECTS,TextureAtlas.class);

    //start loading assets and wait until finished
    assetManager.finishLoading();

    Gdx.app.debug(TAG, "# of assets loaded:" + assetManager.getAssetNames().size);

    for (String a : assetManager.getAssetNames())
        Gdx.app.debug(TAG, "asset:" + a);

    TextureAtlas atlas = assetManager.get(Gameconstants.TEXTURE_ATLAS_OBJECTS);

    //enable texture filtering for pixel smoothing
    for(Texture t : atlas.getTextures())
        t.setFilter(TextureFilter.Linear,TextureFilter.Linear);

    //create game resource objects

    boy = new AssetCharacter(atlas);
    rock = new AssetRock(atlas);
    shield = new AssetShield(atlas);
}

public void dispose() { assetManager.dispose(); }


 @Override
 public void error(String fileName, Class type, Throwable throwable) 
  {
    Gdx.app.error(TAG, "Couldn't load asset' " + fileName + "'", (Exception)throwable); 
  }

}  

2.命令

 public static final String TEXTURE_ATLAS_OBJECTS ="gdxgame-android/assets/packed/packed.png";

3.Package Explorer截图 http://i1294.photobucket.com/albums/b608/Abhishek_M369/PackageExplorer_zpsd2589ee2.jpg

4.错误日志截图(Android DDMS) http://i1294.photobucket.com/albums/b608/Abhishek_M369/ErrorLog_zps8a4a68d9.jpg

5.我尝试过的所有可能的组合

 "/gdxgame-android/assets/packed/packed.png";
 "gdxgame-android/assets/packed/packed.png";
 "/assets/packed/packed.png";
 "assets/packed/packed.png";
 "/packed/packed.png";
 "packed/packed.png";
 "/packed.png";
 "packed.png";

 public static FileHandle location = Gdx.files.internal("assets/packed.png");
 public static final TEXTURE_ATLAS_OBJECT = location.toString();

 //this caused shutdown of emulator
 public static FileHandle location = Gdx.files.internal("assets/packed.png");
 public static final TEXTURE_ATLAS_OBJECT = location.readString();

 // I even tried setting the build path of the asset folder as source folder
 // Also tried placing the image in the data folder.
 // Tried using the absolute path too , i.e Gdx.files.absolute("the absolute");
 // Tried passing the absolute path directly as string

似乎没有什么对我有用。

Answer 1

问题很简单，问题出在libgdx的版本和文档不同。下面解释的答案将仅确认 libgdx 版本 0.9.8。

(注意:使用Texturepacker GUI来打包纹理&&而不是libgdx库中的方法)

首先，必须向“assetManager”提供一个包含图像坐标的文件，这是一个错误，因为我提供了打包图像。

GL20 应该能够解析 NPOT 图像，但它无法这样做，原因仍然未知，所以我不得不将纹理打包到 POT 中，这是通过在 GUI 中选择 POT 选项来完成。完成此操作后，我可以使用以下代码轻松加载新的 POT 图像

/**Mention only the folder/file under the asset dir**/

public class Gameconstants { public static final String location = "packed/packed.txt" }

/**access the same using the following command**/

private AssetManager assetManager;
assetManager.load(Gameconstants.location,Texture.class);

这个答案可能不太有说服力，但它确实解决了我的问题。

感谢所有提供帮助的人:)