Question

我正在开发一个应该连接到URL的应用程序，将图像检索为Bitmap，然后在基于PanoramaGL库的查看器中显示它。

问题在于，即使Log表示图像被捕获，显示仍然是空白的。

这是我用来检索位图的代码，也是我在How to load an ImageView by URL in Android?找到的非常详细的答案。 - 实际上我想直接阅读图像而不用缓存等等。

正如您将看到的大部分代码都来自在线教程，因为我刚刚开始开发。

PanoramaActivity.java（为了测试它可以用作MainActivity）

import java.io.InputStream;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import com.panoramagl.PLImage;
import com.panoramagl.PLSpherical2Panorama;
import com.panoramagl.PLView;

public class PanoramaActivity extends PLView {

Private static final String TAG = "+++++++++++++++";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.panorama_activity_main);
    new DownloadImageTask(this).execute("http://www.pianetacellulare.it/UserFiles/image/Android/Jelly%20Bean/photo_sphere_esempio.jpg");
}

private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {

    PanoramaActivity pan;

    public DownloadImageTask(PanoramaActivity act) {
        this.pan = act;
    }

    protected Bitmap doInBackground(String... urls) {
        String urldisplay = urls[0];
        Bitmap mIcon11 = null;
        try {
            InputStream in = new java.net.URL(urldisplay).openStream();
            mIcon11 = BitmapFactory.decodeStream(in);
        } catch (Exception e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
        return mIcon11;
    }

    protected void onPostExecute(Bitmap result) {
        Log.d(TAG,"onPostExecute");
        PLSpherical2Panorama panorama = new PLSpherical2Panorama();
        panorama.setImage(new PLImage(result));
        pan.setPanorama(panorama);
    }
}   
}

我已经创建了传递PanoramaActivity的构造函数，因为我认为应用程序一直流到onPostExecute方法，我需要找到一种显示图像的方法。如果我错了或有更好的方法请告诉我。

我还发布了tests_activity_main.xml测试布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".PanoramaActivity" >
</RelativeLayout>

任何提示都表示赞赏，提前谢谢：）

更新。我使用ImageView而不是PLView尝试了相同的AsyncTask类，并且图像出来了，因此正确地完成了图像的下载..使用PanoramaGL有些不正确

Answer 1

删除

setContentView(R.layout.panorama_activity_main);

它覆盖了图像。 - ＆GT;即使我不明白为什么会发生这种情况

最重要的是......请确保您链接的图片符合要求：

PanoramaGL仅支持尺寸为2的图像，例如2048x1024,1024x1024,1024x512,512x512,512x256,256x256,256x128。

Answer 2

使用Image loader

private void loadPanorama()
    {
        try
        {
            final Context context = this.getApplicationContext();
            PLIPanorama panorama = null;
            //Lock panoramic view
            this.setLocked(true);


            Toast.makeText(context, "image loader start", Toast.LENGTH_LONG).show();
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/f/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationFront);
                } 
            }); 
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/b/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationBack);
                } 
            }); 
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/l/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationLeft);
                } 
            }); 
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/r/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationRight);
                } 
            }); 
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/u/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationUp);
                } 
            }); 
            imageLoader.loadImage("http://104.245.38.221/www/200/000/005/2000000057042/d/z_0/00.jpg", new SimpleImageLoadingListener()  
            { 
                @Override 
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) 
                { 
                    cubicPanorama.setImage(new PLImage(loadedImage, false), PLCubeFaceOrientation.PLCubeFaceOrientationDown);
                } 
            }); 

            panorama = cubicPanorama;
            Toast.makeText(context, "image loader end", Toast.LENGTH_LONG).show();

            if(panorama != null)
            {
                //Set camera rotation
                panorama.getCamera().lookAt(0.0f, 170.0f);
                //Add a hotspot
                //panorama.addHotspot(new PLHotspot(1, new PLImage(PLUtils.getBitmap(context, R.raw.hotspot), false), 0.0f, 170.0f, 0.05f, 0.05f));
                //Reset view
                this.reset();
                //Load panorama
                this.startTransition(new PLTransitionBlend(2.0f), panorama); //or use this.setPanorama(panorama);
            }
            //Unlock panoramic view
            this.setLocked(false);
        }
        catch(Throwable e)
        {
            Toast.makeText(this.getApplicationContext(), "Error: " + e, Toast.LENGTH_SHORT).show();
        }
    }

如果出现黑屏，您可以覆盖

@Override
public void onLoadingStarted(String imageUri, View view) {
if (frontBitamp != null) {
cubicPanorama.setImage(new PLImage(frontBitamp, false),
PLCubeFaceOrientation.PLCubeFaceOrientationFront);
}};
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
cubicPanorama.setImage(new PLImage(loadedImage, false),
PLCubeFaceOrientation.PLCubeFaceOrientationFront);
frontBitamp = loadedImage;}

PanoramaGL查看器的位图URL

2 个答案: