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我将图像保存到缓存,然后检索它们。

我将一些 url 字符串保存到 SharedPreferences,然后在活动为 Create() 时将它们拉出。

问题是当我运行这个方法时..

public void getImagesfromCache(){
        ImageAdapter adapter = new ImageAdapter();

    String[] cachImages = myRemoteImages; //I set the CacheImages String[] here

    try {   
     URL aURL2 = null;
     aURL2 = new URL(cachImages[position]);  //I get a MalformedURLException here 
     URI imageCacheUri = null;


     try {
            imageCacheUri = aURL2.toURI();
        } catch (URISyntaxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        if(new File(new File(this.getApplicationContext().getCacheDir(), "thumbnails"),"" + imageCacheUri.hashCode()).exists()){
            Log.v("FOUND", "Images found in cache! Now being loaded!");
            String cacheFile = this.getApplicationContext().getCacheDir() +"/thumbnails/"+ imageCacheUri.hashCode();
            ImageView i = new ImageView(this.getApplicationContext());
            FileInputStream fis = null;
            try {
                fis = new FileInputStream(cacheFile);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            Bitmap bm = BitmapFactory.decodeStream(fis);

             i.setImageBitmap(bm);
             putBitmapInDiskCache(imageCacheUri, bm);

             Log.v("Loader", "Image saved to cache");

             ((Gallery) findViewById(R.id.gallery))
              .setAdapter(new ImageAdapter(MainMenu.this));
        }

    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

创建活动时,我将每个 url 设置为来自 sharedpreferences 的变量。

        SharedPreferences app_preferences = 
            this.getSharedPreferences("images_urls", MODE_WORLD_READABLE);
    imageUrl = app_preferences.getString("URL1", "Does not exist in preference");
    imageUrl2 = app_preferences.getString("URL2", "Does not exist in cache");
    imageUrl3 = app_preferences.getString("URL3", "Does not exist in preference");
    imageUrl4 = app_preferences.getString("URL4", "Does not exist in preference");

    Log.e("Preference", imageUrl + imageUrl2 + imageUrl3 + imageUrl4);

如您所见,我记录它以确保它拉动某些东西。它显示在调试中,其中包含我最初保存的所有 URL。

当从 SharePreferences 中提取字符串时,我在 oncreate 中调用 getimagesfromCache(),

那么为什么我在该行得到 malformedURLException 呢?

编辑:这是我用于远程图像的代码....

和位置..

 int position;

公共字符串 [] myRemoteImages = {imageUrl,imageUrl2,imageUrl3,imageUrl4};

我有一个图像适配器...我在 BaseAdapter 内部使用它来设置位置

    public View getView(int position, View convertView, ViewGroup parent) {
                ImageView i = new ImageView(this.myContext);

                try {

            URL aURL = new URL(myRemoteImages[position]);

编辑:如何使用 imageAdapter 的 getView() 中的 int 位置?还是我需要它?

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