Question

我正试图用下一个代码用凸轮制作一张照片，但我总是犯同样的错误：

 skia(446): --- SkImageDecoder::Factory returned null

（它没有抛出异常）。因此，对象位图始终为NULL，我无法看到pic只是用凸轮制作的，我可以用Eclipse的文件资源管理器看到它。

发生什么事了？我怎样才能解决这个问题？

public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.view_photo);        
    ImageView imagen = (ImageView)findViewById(R.id.foto);
    try {
        Cursor cur = this.getContentResolver().query(Media.EXTERNAL_CONTENT_URI,   null, null, null,null); 
        String str = cur.getString(cur.getColumnIndex(MediaStore.Images.ImageColumns.DISPLAY_NAME));
        cur.moveToLast();

        FileInputStream in = new FileInputStream("/sdcard/DCIM/Camera/" + str);
        BufferedInputStream buf = new BufferedInputStream(in, 24);
        Bitmap bMap = BitmapFactory.decodeStream(buf);
        if (bMap != null)
            imagen.setImageBitmap(bMap);
        else{
            Log.d("onCreate: ", "bMap es NULL");
        }
        if (in != null) {
            in.close();
            Log.d("onCreate: ", "in cerrado");
        }
        if (buf != null) {
            buf.close();
            Log.d("onCreate: ", "buf cerrado");
        }
        Log.d("onCreate: ", "Fin del proceso");
    }catch (Exception e) {
        Log.e("Error reading file", e.toString());
    }           

}

Answer 1

尝试以下方法：


     // get the SD Card path, you need to check first if this is available
     File sdcard = Environment.getExternalStorageDirectory(); 

     // I am assuming str is your filename, make sure you are getting the right value for this one
     File file = new File(sdcard.getAbsolutePath(), str);

     // Note that the buffer size is in bytes, so 24 in your question is very low
     BufferedInputStream buf = new BufferedInputStream(in, 8192);
     Bitmap bMap = BitmapFactory.decodeStream(buf);

BitmapFactory.decodeStream始终返回NULL

1 个答案: