alexRain的空间

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View Code
public static Bitmap downloadBitmap(String imageUrl) {
Log.d(
"try to download image","imageUrl:"+imageUrl);
URL url
= null;
Bitmap bitmap
= null;
try {
/* new URL对象将网址传入 */
url
= new URL(imageUrl);
}
catch (MalformedURLException e) {
e.printStackTrace();
return null;
}
try {
/* 取得连接 */
HttpURLConnection conn
= (HttpURLConnection) url
.openConnection();
conn.setConnectTimeout(
5 * 1000);
conn.connect();
/* 取得返回的InputStream */
InputStream is
= conn.getInputStream();
/* 将InputStream变成Bitmap */
bitmap
= BitmapFactory.decodeStream(is);
/* 关闭InputStream */
is.close();
}
catch (IOException e) {
e.printStackTrace();
}
return bitmap;

}

有时候,需要对下载下来的图片调整大小:

View Code
public static Drawable resizeImage(Bitmap bitmap, int w, int h) {

Bitmap BitmapOrg
= bitmap;

int width = BitmapOrg.getWidth();
int height = BitmapOrg.getHeight();
int newWidth = w;
int newHeight = h;

// calculate the scale
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;

// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the Bitmap
matrix.postScale(scaleWidth, scaleHeight);

// recreate the new Bitmap
Bitmap resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width,
height, matrix,
true);

return new BitmapDrawable(resizedBitmap);

}
posted on 2011-08-15 11:45  alexRain  阅读(385)  评论(0编辑  收藏  举报