SkImageDecoder：工厂返回 null

Posted 2023-05-07

【中文标题】SkImageDecoder：工厂返回 null

【英文标题】：SkImageDecoder: Factory returned null

【发布时间】：2017-05-10 14:41:33

【问题描述】：

我正在使用 mysql 服务器将图像从数据库获取到 android 以显示在 ImageView 中。但是，我收到以下错误：

SkImageDecoder:: Factory returned null 

这个问题之前已经回答过了，但是我打过一次.decodeStream？如果您能帮助我将不胜感激

MainActivty.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener 
private String imagesJSON;

private static final String JSON_ARRAY ="result";
private static final String IMAGE_URL = "url";

private JSONArray arrayImages= null;

private int TRACK = 0;

private static final String IMAGES_URL = "http://thakurnigamananda.com/getAllImages.php";

private Button buttonFetchImages;
private Button buttonMoveNext;
private Button buttonMovePrevious;
private ImageView imageView;


@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imageView = (ImageView) findViewById(R.id.imageView);
    buttonFetchImages = (Button) findViewById(R.id.buttonFetchImages);
    buttonMoveNext = (Button) findViewById(R.id.buttonNext);
    buttonMovePrevious = (Button) findViewById(R.id.buttonPrev);
    buttonFetchImages.setOnClickListener(this);
    buttonMoveNext.setOnClickListener(this);
    buttonMovePrevious.setOnClickListener(this);



private void extractJSON()
    try 
        JSONObject jsonObject = new JSONObject(imagesJSON);
        arrayImages = jsonObject.getJSONArray(JSON_ARRAY);
     catch (JSONException e) 
        e.printStackTrace();
    


private void showImage()
    try 
        JSONObject jsonObject = arrayImages.getJSONObject(TRACK);
        getImage(jsonObject.getString(IMAGE_URL));
     catch (JSONException e) 
        e.printStackTrace();
    


private void moveNext()
    if(TRACK < arrayImages.length())
        TRACK++;
        showImage();
    


private void movePrevious()
    if(TRACK>0)
        TRACK--;
        showImage();
    




private void getAllImages() 
    class GetAllImages extends AsyncTask<String,Void,String>
        ProgressDialog loading;
        @Override
        protected void onPreExecute() 
            super.onPreExecute();
            loading = ProgressDialog.show(MainActivity.this, "Fetching Data...","Please Wait...",true,true);
        

        @Override
        protected void onPostExecute(String s) 
            super.onPostExecute(s);
            loading.dismiss();
            imagesJSON = s;
            extractJSON();
            showImage();
        

        @Override
        protected String doInBackground(String... params) 
            String uri = params[0];
            BufferedReader bufferedReader = null;
            try 
                URL url = new URL(uri);
                HttpURLConnection con = (HttpURLConnection) url.openConnection();
                StringBuilder sb = new StringBuilder();

                bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
                String json;
                while((json = bufferedReader.readLine())!= null)
                    sb.append(json+"\n");
                

                return sb.toString().trim();

            catch(Exception e)
                return null;
            
        
    
    GetAllImages gai = new GetAllImages();
    gai.execute(IMAGES_URL);


private void getImage(String urlToImage)
    class GetImage extends AsyncTask<String,Void,Bitmap>
        ProgressDialog loading;
        @Override
        protected Bitmap doInBackground(String... params) 
            URL url = null;
            Bitmap image = null;

            String urlToImage = params[0];
            try 
                url = new URL(urlToImage);
                image = BitmapFactory.decodeStream(url.openConnection().getInputStream());

             catch (MalformedURLException e) 
                e.printStackTrace();
             catch (IOException e) 
                e.printStackTrace();
            
            return image;
        

        @Override
        protected void onPreExecute() 
            super.onPreExecute();
            loading = ProgressDialog.show(MainActivity.this,"Downloading Image...","Please wait...",true,true);
        

        @Override
        protected void onPostExecute(Bitmap bitmap) 
            super.onPostExecute(bitmap);
            loading.dismiss();
            imageView.setImageBitmap(bitmap);
        
    
    GetImage gi = new GetImage();
    gi.execute(urlToImage);


@Override
public void onClick(View v) 
    if(v == buttonFetchImages) 
        getAllImages();
    
    if(v == buttonMoveNext)
        moveNext();
    
    if(v== buttonMovePrevious)
        movePrevious();
    

Logcat：

12-25 22:01:30.150 30009-30009/com.example.ayush.testingfordata     I/ViewRootImpl: ViewRoot's Touch Event : Touch Down
12-25 22:01:30.180 30009-30009/com.example.ayush.testingfordata I/ViewRootImpl: ViewRoot's Touch Event : Touch UP
12-25 22:01:30.340 30009-30225/com.example.ayush.testingfordata D/libc: getaddrinfo called from pid =30009
12-25 22:01:30.340 30009-30225/com.example.ayush.testingfordata E/DataScheduler: isDataSchedulerEnabled():false
12-25 22:01:30.340 30009-30225/com.example.ayush.testingfordata D/libc: getaddrinfo called from pid =30009
12-25 22:01:31.080 30009-30225/com.example.ayush.testingfordata D/libc: dnsproxy getaddrinfo returns 0
12-25 22:01:31.800 30009-30282/com.example.ayush.testingfordata D/skia: --- SkImageDecoder::Factory returned null

【问题讨论】：

没关系，我修复了，这是 PHP 脚本中的错误。

【参考方案1】：

已修复，PHP 脚本和数据库中的错误。