下載圖像到內部存儲器

Question

我想從URL下載的圖像並保存到內部存儲 我有這樣的代碼，但如果我的手機不具備外部存儲的圖像不能被下載

Bitmap b=null; 
    URL url; 
    InputStream iStream=null; 
    File tmpFile; 
    try { 
     url = new URL(strURL); 
     HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();    
     urlConnection.connect(); 
     iStream = urlConnection.getInputStream(); 
     File cacheDirectory = context.getCacheDir(); 
     tmpFile = new File(cacheDirectory.getPath() + "/news.png"); 
     FileOutputStream fOutStream = new FileOutputStream(tmpFile); 
     b = BitmapFactory.decodeStream(iStream); 
     b.compress(Bitmap.CompressFormat.PNG,100, fOutStream); 

     fOutStream.flush(); 
     fOutStream.close(); 
    } 
    catch(Exception ee) 
    { 

    } 
    return b; 

做你幫我從url下載映像到內部存儲內置存儲內存

Answer 1

你首先需要檢查手機是否有外部目錄。 android documentation已經有這樣做的代碼。

/* Checks if external storage is available for read and write */ 
public boolean isExternalStorageWritable() { 
    String state = Environment.getExternalStorageState(); 
    if (Environment.MEDIA_MOUNTED.equals(state)) { 
     return true; 
    } 
    return false; 
} 

/* Checks if external storage is available to at least read */ 
public boolean isExternalStorageReadable() { 
    String state = Environment.getExternalStorageState(); 
    if (Environment.MEDIA_MOUNTED.equals(state) || 
     Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) { 
     return true; 
    } 
    return false; 
}