android操作sqlite3的blob字段,显示数据中的图片

SQLiteDatabase database = SQLiteDatabase
.openOrCreateDatabase(getFileStreamPath(fileName)
.getAbsolutePath(), null);
Cursor cursor = database.rawQuery(
"select name,image from users", new String[] {});

if (cursor.moveToFirst()) {
userName = cursor.getString(0);
ByteArrayInputStream stream = new ByteArrayInputStream(
cursor.getBlob(1));
image = Drawable.createFromStream(stream, "image");
Log.i(TAG, "user name: " + userName);
}
database.close();

声明的成员变量，供上面代码使用的：

private String userName;

private Drawable image;

在对话框里面显示：

AlertDialog.Builder builder = new Builder(
WelComeMainActivity.this);
builder.setMessage("数据更新完毕。用户名：" + userName);
builder.setTitle("提示");
builder.setIcon(image);
builder.setPositiveButton("确认", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
dialog.dismiss();
}
});
builder.create().show();