Libgdx 从 Gdx.files.external() 加载纹理显示为黑色矩形

Question

我已经添加了外部读写权限，并向用户请求了权限。我已经使用 libgdx 文件系统来生成我想要加载的图片的文件句柄列表。我这样加载它们：

image = new Texture(fh); //fh is the filehandle

当我渲染我试图加载的任何图像时，它只会渲染一个黑色矩形。我像往常一样使用带有 .draw 方法的 spritebatch 渲染它们。知道为什么它们呈现为黑色矩形吗？提前致谢/

我的图片模块代码：

package com.ggi.uparty.ui;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.Rectangle;
import com.ggi.uparty.screens.ImagePicker;

public class ImagePickerModule {

public ImagePicker p;

public FileHandle fh;

public Texture image = null;

public TextureRegion load,preview;


public float theta = 0;

public Rectangle bounds = new Rectangle();

public ImagePickerModule(ImagePicker p, final FileHandle fh){
    theta = 0;
    bounds.width=.85f*Gdx.graphics.getWidth()/6f;
    bounds.height=bounds.width;

    load = new TextureRegion(p.u.assets.get("UI/Load.png", Texture.class));

    Thread t = new Thread(new Runnable(){

        @Override
        public void run() {
            try{
            //image = new Texture(fh);

            image = new Texture(fh);
            System.out.println(fh.path());
            float sqSize = image.getWidth()<image.getHeight()?image.getWidth():image.getHeight();
            preview = new TextureRegion(image,bounds.x+bounds.width/2-sqSize/2,bounds.y+bounds.height/2-sqSize/2,sqSize,sqSize);
            }catch(Exception e){
                e.printStackTrace();
            }

        }

    });
    t.start();
}

public void draw(SpriteBatch pic,float fade){
    theta++;
    pic.setColor(1, 1, 1, fade);
    if(image == null){
        pic.draw(load, bounds.x+bounds.width / 2 - bounds.height / 4, bounds.y + bounds.height / 4+theta, bounds.height / 4,
                bounds.height / 4, bounds.height / 2, bounds.height / 2, 1, 1, -theta);
    }
    else{
        pic.draw(image,bounds.x,bounds.y+theta,bounds.width,bounds.height);
    }
}

}

Answer 1

您正在尝试在非ui 线程上加载纹理。如果您想异步加载纹理，请使用 assetmanager。

要对此进行测试，请尝试将 Thread.start 更改为 thread.run（运行立即在您现在所在的线程中，因此禁用该线程）图像应该可以正常加载。

然后获取异步加载实现资产管理器：

https://github.com/libgdx/libgdx/wiki/Managing-your-assets

Libgdx 从 Gdx.files.external() 加载纹理显示为黑色矩形

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