【移动应用开发技术】怎么在Android中对网络图片进行获取

【移动应用开发技术】怎么在Android中对网络图片进行获取

这篇文章给大家介绍怎么在Android中对网络图片进行获取，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。工程文件结构：布局文件中就一个ImageView用来显示图片，一个Button用来获取图片。MainActivity.javapublic

class

MainActivity

extends

AppCompatActivity

{

Button

button;

ImageView

imageView;

String

url

=

"/dccba6282641a9e0.jpg";

//String

textURL

=

"04:8080/add.jsp";

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

button

=

(Button)

findViewById(R.id.button);

imageView

=

(ImageView)

findViewById(R.id.imageView);

button.setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

new

Thread(new

Runnable()

{

@Override

public

void

run()

{

Bitmap

bmp

=

getURLimage(url);

Message

msg

=

new

Message();

msg.what

=

0;

msg.obj

=

bmp;

System.out.println("000");

handle.sendMessage(msg);

}

}).start();

}

});

}

//在消息队列中实现对控件的更改

private

Handler

handle

=

new

Handler()

{

public

void

handleMessage(Message

msg)

{

switch

(msg.what)

{

case

0:

System.out.println("111");

Bitmap

bmp=(Bitmap)msg.obj;

imageView.setImageBitmap(bmp);

break;

}

};

};

//加载图片

public

Bitmap

getURLimage(String

url)

{

Bitmap

bmp

=

null;

try

{

URL

myurl

=

new

URL(url);

//

获得连接

HttpURLConnection

conn

=

(HttpURLConnection)

myurl.openConnection();

conn.setConnectTimeout(6000);//设置超时

conn.setDoInput(true);

conn.setUseCaches(false);//不缓存

conn.connect();

InputStream

is

=

conn.getInputStream();//获得图片的数据流

bmp

=

BitmapFactory.decodeStream(is);//读取图像数据

//读取文本数据

//byte[]

buffer

=

new

byte[100];

//inputStream.read(buffer);

//text

=

new

String(buffer);

is.close();

}

catch

(Exception

e)

{

e.printStackTrace();