Android 图片如何互相转化

1.String转uri，uri转drawble:

        Uri uri=Uri.parse(”“);
        Drawable d=Drawable.createFromStream(getContext().getContentResolver().openInputStream(uri),"");

2.int转bitmap，bitmap,转drawble:

  //int转bitmap:
  @SuppressLint("ResourceType") InputStream is = getResources().openRawResource(R.drawable.joey);
  //bitmap转drawble:
  Drawable drawable = BitmapDrawable.createFromStream(is, null);

3.String转bitmap:

  //图片转换的方法：
    public Bitmap returnBitMap(final String url){
        new Thread(new Runnable() {
            @Override
            public void run() {
                URL imageurl = null;

                try {
                    imageurl = new URL(url);
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                }
                try {
                    HttpURLConnection conn = (HttpURLConnection)imageurl.openConnection();
                    conn.setDoInput(true);
                    conn.connect();
                    InputStream is = conn.getInputStream();
                    bitmap = BitmapFactory.decodeStream(is);
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        return bitmap;
    }