网络获取图片

一：图片路径

private static final String imURL="http://www.linuxidc.com/upload/2013_03/130303094222771.png";

二：在oncreate方法中：

protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		imageView=(ImageView) findViewById(R.id.imageView1);
		asyncTask.execute(imURL);
	}

三：用AsyncTask异步加载，区分的线程问题

private AsyncTask asyncTask=new AsyncTask(){

		@Override
		protected Bitmap doInBackground(String... arg0) {
			String url=arg0[0];
			Bitmap bitmap = null;
			InputStream inputStream = null;
			try {
				URL u=new URL(url);
				HttpURLConnection connection=(HttpURLConnection) u.openConnection();
				inputStream=connection.getInputStream();
				bitmap=BitmapFactory.decodeStream(inputStream);
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				try {
					inputStream.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			return bitmap;
		}

		@Override
		protected void onPostExecute(Bitmap result) {
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			if(result!=null){
				imageView.setImageBitmap(result);
			}
		}
	};

提示：在AndroidManiFest.xml文件中，加上网络访问权限：