Libgdx: 打开外部文件时找不到文件错误 'Internal'

Question

这里有一个适合你的。

我正在尝试使用外部打开文件。

FileHandle dirHandel = Gdx.files.external("MyApps/skanectModel.g3db");
boolean isDir = Gdx.files.external("MyApps/skanectModel.g3db").exists();

我知道文件在那里，bool 告诉我事实上它在那里。

主要问题是我收到此错误。

Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Error reading file: MyApps/skanectModel.png (Internal)

我不知道为什么要这样做，我不是在寻找内部文件。

出于好奇，我像这样在我的资产文件夹中创建了文件 assets/MyApps/skanectModel.png，代码运行完美，该应用程序也可以在我的 android.

上播放

但是...我只需要能够读取外部信息。我正在为一些朋友构建一个简单的 3D 查看器，我会时不时地向他们发送 3D 模型。

这是代码的副本：

package com.mygdx.game;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.assets.loaders.ModelLoader;
import com.badlogic.gdx.Files;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.g3d.Environment;
import com.badlogic.gdx.graphics.g3d.Model;

import com.badlogic.gdx.graphics.g3d.ModelBatch;
import com.badlogic.gdx.graphics.g3d.ModelInstance;
import com.badlogic.gdx.graphics.g3d.attributes.ColorAttribute;
import com.badlogic.gdx.graphics.g3d.environment.DirectionalLight;
import com.badlogic.gdx.graphics.g3d.loader.G3dModelLoader;
import com.badlogic.gdx.graphics.g3d.loader.ObjLoader;
import com.badlogic.gdx.graphics.g3d.utils.CameraInputController;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.utils.UBJsonReader;

public class MyGdxGame implements ApplicationListener {
    public Environment environment;
    public PerspectiveCamera cam;
    public CameraInputController camController;
    public ModelBatch modelBatch;
    public Model model;
    public ModelInstance instance;

@Override
public void create() {
    environment = new Environment();
    environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 1.4f, 1.4f, 1.4f, 5f));
    environment.add(new DirectionalLight().set(0.8f, 0.8f, 0.8f, -1f, -0.8f, -0.2f));

    cam = new PerspectiveCamera(75,Gdx.graphics.getWidth(),Gdx.graphics.getHeight());
    cam.position.set(50f, 1f, 50f);
    cam.lookAt(0,0,0);
    cam.near = 0.1f;
    cam.far = 500f;
    cam.update();

    modelBatch = new ModelBatch();
//      ModelLoader<?> loader = new ObjLoader();
    UBJsonReader jsonReader = new UBJsonReader();
    G3dModelLoader modelLoader = new G3dModelLoader(jsonReader);

//      model = modelLoader.loadModel(Gdx.files.getFileHandle("root/MyApps/skanectModel.g3db",Files.FileType.Absolute));
//      model = modelLoader.loadModel(Gdx.files.getFileHandle("skanectModel.g3db",Files.FileType.External));

    FileHandle dirHandel = Gdx.files.external("MyApps/skanectModel.g3db");
    boolean isDir = Gdx.files.external("MyApps/skanectModel.g3db").exists();
    Gdx.app.log("is it", String.valueOf(isDir));
//      for (FileHandle entry: dirHandel.list()){
//          Gdx.app.log("Path",entry.toString());
//      }
    model = modelLoader.loadModel(dirHandel);
//      model = modelLoader.loadModel(Gdx.files.getFileHandle("skanectModel.g3db",Files.FileType.External));
    instance = new ModelInstance(model);
    instance.transform.rotate(90f,0f,0,-90f);


    camController = new CameraInputController(cam);
    Gdx.input.setInputProcessor(camController);
}

@Override
public void render() {
    camController.update();

    Gdx.gl.glViewport(0,0,Gdx.graphics.getWidth(),Gdx.graphics.getHeight());
    Gdx.gl.glClearColor(.5f,1,1,1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);

    modelBatch.begin(cam);
    modelBatch.render(instance, environment);
    modelBatch.end();
}

@Override
public void dispose() {
    modelBatch.dispose();
    model.dispose();
}

@Override
    public void resize(int width, int height) {
}

@Override
    public void pause() {
}

@Override
    public void resume() {
}
}

请帮忙...!!!

编辑：这是完整的错误日志：

06-20 10:00:47.918    3205-3221/com.mygdx.game.android E/AndroidRuntime﹕    FATAL EXCEPTION: GLThread 39207
Process: com.mygdx.game.android, PID: 3205
com.badlogic.gdx.utils.GdxRuntimeException: Couldn't load file:MyApps/skanectModel.png
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:140)
at com.badlogic.gdx.graphics.TextureData$Factory.loadFromFile(TextureData.java:98)  at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:100) 
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:92)
at com.badlogic.gdx.graphics.g3d.utils.TextureProvider$FileTextureProvider.load(TextureProvider.java:34) 
at com.badlogic.gdx.graphics.g3d.Model.convertMaterial(Model.java:290)
at com.badlogic.gdx.graphics.g3d.Model.loadMaterials(Model.java:266)
at com.badlogic.gdx.graphics.g3d.Model.load(Model.java:107)
at com.badlogic.gdx.graphics.g3d.Model.<init>(Model.java:102)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:54)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:69)
at com.mygdx.game.MyGdxGame.create(MyGdxGame.java:65)
at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:241)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1520)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)
Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Error reading file: MyApps/skanectModel.png (Internal)
at com.badlogic.gdx.backends.android.AndroidFileHandle.read(AndroidFileHandle.java:77)
at com.badlogic.gdx.files.FileHandle.readBytes(FileHandle.java:222)
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:137)
at com.badlogic.gdx.graphics.TextureData$Factory.loadFromFile(TextureData.java:98)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:100)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:92)
at com.badlogic.gdx.graphics.g3d.utils.TextureProvider$FileTextureProvider.load(TextureProvider.java:34)
at com.badlogic.gdx.graphics.g3d.Model.convertMaterial(Model.java:290)
at com.badlogic.gdx.graphics.g3d.Model.loadMaterials(Model.java:266)
at com.badlogic.gdx.graphics.g3d.Model.load(Model.java:107)
at com.badlogic.gdx.graphics.g3d.Model.<init>(Model.java:102)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:54)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:69)
at com.mygdx.game.MyGdxGame.create(MyGdxGame.java:65)
at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:241)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1520)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)
Caused by: java.io.FileNotFoundException: MyApps/skanectModel.png
at android.content.res.AssetManager.openAsset(Native Method)
at android.content.res.AssetManager.open(AssetManager.java:324)
at android.content.res.AssetManager.open(AssetManager.java:298)
at com.badlogic.gdx.backends.android.AndroidFileHandle.read(AndroidFileHandle.java:75)
at com.badlogic.gdx.files.FileHandle.readBytes(FileHandle.java:222)
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:137)
at com.badlogic.gdx.graphics.TextureData$Factory.loadFromFile(TextureData.java:98)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:100)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:92)
at com.badlogic.gdx.graphics.g3d.utils.TextureProvider$FileTextureProvider.load(TextureProvider.java:34)
at com.badlogic.gdx.graphics.g3d.Model.convertMaterial(Model.java:290)
at com.badlogic.gdx.graphics.g3d.Model.loadMaterials(Model.java:266)
at com.badlogic.gdx.graphics.g3d.Model.load(Model.java:107)
at com.badlogic.gdx.graphics.g3d.Model.<init>(Model.java:102)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:54)
at com.badlogic.gdx.assets.loaders.ModelLoader.loadModel(ModelLoader.java:69)
at com.mygdx.game.MyGdxGame.create(MyGdxGame.java:65)
at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphi cs.java:241)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1520)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)

******编辑***** 在收到 MadEqua 的快速建议后，这就是我实施修复的方式。

FileHandle dirHandel = Gdx.files.external("MyApps/skanectModel.g3db");
myT = new TextureProvider() {
@Override
public Texture load(String fileName) {
Texture result = new Texture(Gdx.files.external(fileName));
result.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear);
result.setWrap(Texture.TextureWrap.Repeat, Texture.TextureWrap.Repeat);
return result;
  }
};
myT.load("Myapps/skanectModel.png");
model = modelLoader.loadModel(dirHandel,myT);

Answer 1

File handling Libgdx Wiki

来自他们的 wiki

External files paths are relative to the SD card root on Android and to the home directory of the current user on desktop systems.

和

Local files are stored relative to the application's root or working directory on desktops and relative to the internal (private) storage of the application on Android. Note that Local and internal are mostly the same on the desktop.

因此，如果您的文件位于项目根目录中，您应该使用本地文件而不是外部文件。能否提供更多信息，比如测试平台。

Answer 2

仔细查看堆栈跟踪后，模型文件本身似乎已正确加载。

加载模型的纹理时出现问题：

at com.badlogic.gdx.backends.android.AndroidFileHandle.read(AndroidFileHandle.java:75) at com.badlogic.gdx.files.FileHandle.readBytes(FileHandle.java:222) at com.badlogic.gdx.graphics.Pixmap.(Pixmap.java:137) at com.badlogic.gdx.graphics.TextureData$Factory.loadFromFile(TextureData.java:98) at com.badlogic.gdx.graphics.Texture.(Texture.java:100) at com.badlogic.gdx.graphics.Texture.(Texture.java:92) at com.badlogic.gdx.graphics.g3d.utils.TextureProvider$FileTextureProvider.load(TextureProvider.java:34) at com.badlogic.gdx.graphics.g3d.Model.convertMaterial(Model.java:290) at com.badlogic.gdx.graphics.g3d.Model.loadMaterials(Model.java:266)

我相信 libGDX 正在尝试从错误的位置（内部位置，解释您遇到的错误）加载纹理文件。

我从未使用过 libDGX 模型函数，但我认为您应该改用此方法：loadModel(FileHandle fileHandle, TextureProvider textureProvider)

并传入 TextureProvider 从外部文件夹加载纹理文件。（并确保纹理文件在那里）。

通过查看 FileTextureProvider.

应该很容易实现自定义的 TextureProvider 来做到这一点

Libgdx: 打开外部文件时找不到文件错误 'Internal'

Libgdx: File not found error 'Internal' when opening external file

android

libgdx