SQLite数据库如何存储图片/语音
请问如何利用sqlite的blob类型存储图片语音文件。
已知目前接收到的是一个图片或者语音的url地址,能否在存入sqlite数据库的时候把图片或者语音通过接收到的url地址存储到sqlite数据库中。
谢谢。
回复内容:
请问如何利用sqlite的blob类型存储图片语音文件。
已知目前接收到的是一个图片或者语音的url地址,能否在存入sqlite数据库的时候把图片或者语音通过接收到的url地址存储到sqlite数据库中。
谢谢。
1、HttpConnect获取图片数据;
2、将图像数据转换二进制写入数据库
ContentValues values = new ContentValues();
final ByteArrayOutputStream os = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, os);
values.put("express_img", os.toByteArray());
values.put("express_name","zf");
values.put("express_no","zf");
getContentResolver().insert("express", values);
3、从SQLite中读取Bitmap
byte[] in=cur.getBlob(cur.getColumnIndex("express_img"));
bmpout=BitmapFactory.decodeByteArray(in,0,in.length);
4、 显示在ImageView上
ImageView imageView = (ImageView) view.findViewById(R.id.img);
ByteArrayInputStream stream = new ByteArrayInputStream(cur.getBlob(cur.getColumnIndex("express_img")));
imageView.setImageDrawable(Drawable.createFromStream(stream, "img"));
<code> $url = "http://....../logo.png"; $handle = fopen($url,"rb"); $contents = fread($handle,filesize($url));</code>
var_dump($contents);
为什么这样把一个url的图片读取为二进制,输出$contents为:bool(false)

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
