将bitmap对象保存为一个图片文件

/**
 * 将bitmap对象保存为一个图片文件
 * 
 * @param bmp
 *            需要保存的bitmap对象
 * @param headPath
 *            保存的路径
 */
public static boolean savebmp(Bitmap bmp, Uri uri) {
boolean isUpload = false;
File file = createFile(uri.getEncodedPath());
try {
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
isUpload = true;
} catch (Exception e) {
e.printStackTrace();
isUpload = false;
}
return isUpload;

}