android通过访问网页查看网页源码

1.添加网络权限

<!--访问网络的权限-->
<uses-permission android:name="android.permission.INTERNET"/>

2.获取网络中网页的数据

/**
	 * 获取网页HTML源代码
	 * @param path 网页路径
	 */
	public static String getHtml(String path) throws Exception {
		URL url=new URL(path);
		HttpURLConnection conn=(HttpURLConnection)url.openConnection();
		conn.setConnectTimeout(5000);
		conn.setRequestMethod("GET");
		if(conn.getResponseCode()==200){
			InputStream inStream=conn.getInputStream();
			byte[] data=read(inStream);
			String html=new String(data,"UTF-8");
			return html;
		}
		return null;
	}

	/**
	 * 读取流中的数据
	 */
	public static byte[] read(InputStream inputStream) throws IOException {
		ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
		byte[] b=new byte[1024];
		int len=0;
		while((len=inputStream.read(b))!=-1){
			outputStream.write(b);
		}
		inputStream.close();
		return outputStream.toByteArray();
	}

3.处理查看网页源码的控制

public class HtmlViewActivity extends Activity {

	private EditText pathText;
	private TextView codeView;
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        pathText=(EditText) findViewById(R.id.pagepath);//网页路径
        codeView=(TextView)findViewById(R.id.codeView);//显示获得的源码
        Button button=(Button) findViewById(R.id.button);//查看按钮
        button.setOnClickListener(new ButtonClickListener());//按钮事件
    }
	/**
	 * 查看按钮处理事件
	 */
	private final class ButtonClickListener implements View.OnClickListener{
		@Override
		public void onClick(View v) {
			String path=pathText.getText().toString();
			try {
				String html=PageService.getHtml(path);
				codeView.setText(html);
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(getApplicationContext(), R.string.error, 1);
			}
		}
	}
}