安卓图片加载代码

来源：互联网发布：春英广场舞网络一线牵编辑：程序博客网时间：2024/05/17 01:07

1.大框架(简单界面)

button.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View view) {        new Thread() {            @Override            public void run() {                byte[] a = new byte[0]; // 获取图片数据                try {                    a = Imageservice.getImgae(editText.getText().toString());                } catch (IOException e) {                    e.printStackTrace();                }                Bitmap bitmap = BitmapFactory.decodeByteArray(a, 0, a.length);//数据转化为图片                Message message = Message.obtain();                message.what = 0x11;                handler.sendMessage(message);                message.obj = bitmap;            }        }.start();    }});handler = new Handler() {    @Override    public void handleMessage(Message msg) {        if (msg.what == 0x11) {            imageView.setImageBitmap((Bitmap) msg.obj);        }    }};

2.Imageservice类

public static byte[] getImgae(String string) throws IOException {    URL url = new URL(string);    HttpURLConnection conn = (HttpURLConnection) url.openConnection();    // 基于HTTP协议的连接对象    conn.setRequestMethod("GET");    conn.setConnectTimeout(5000);    InputStream inputstream = conn.getInputStream();    try {        return StreamTool.readData(inputstream);        // 读取流中数据并返回        // 下列操作获取源码            /*String html=new String(StreamTool.readData(inputstream),"UTF-8");            return html;*/    } catch (Exception e) {        e.printStackTrace();    }    return null;}

3.SteamTool工具类（负责从流中读取数据）

public  class StreamTool {    public static byte[] readData(InputStream inputstream) throws Exception {        ByteArrayOutputStream bb = new ByteArrayOutputStream(); //可以捕获内存缓冲区的数据，转换成字节数组。        byte[] b = new byte[1024];        int len = 0;        while ((len = inputstream.read(b, 0, b.length)) != -1) {            bb.write(b, 0, len);        }        return bb.toByteArray(); ////获取内存缓冲中的数据    }}

阅读全文

0 0