数据库sqlite 存储图片

SQLite可以存储 BLOB（binary large object，二进制大对象）格式数据，利用它可以在安卓应用开发中存储图片资源。

这里先讲下，怎样把数据从数据库中取出，并显示在imagView中。

代码如下：

private ImageView pic;
pic = (ImageView) findViewById(R.id.pic_school);
pic.setImageDrawable(dbm.blobToDrawable(cursor.getBlob(4)));

public Drawable blobToDrawable(byte [] fromBlob){
        Drawable forChange = null;
        if(fromBlob.length == 0)
            return forChange;
        ByteArrayInputStream msgContent = new ByteArrayInputStream(fromBlob);
        forChange = Drawable.createFromStream(msgContent, "image");
        return forChange;
    }

另外长字符串的转换如下：

public String blobToString(byte [] fromBlob ){
        String forChange = "";
        if(fromBlob.length == 0)
            return forChange;
        forChange = new String(fromBlob);
        return forChange;
    }