我的程序会询问学生的用户名和密码，成功登录后，它会从主页的 HTML 源代码中获取学生的图片和姓名，并将其显示在另一个意图或活动上。
它运行良好，但我想查看另一个页面的 HTML 源代码，但我不知道如何。每次我创建另一个 httpclient 或 httpost 来访问另一个页面时，即使我已经登录，它也会显示登录页面的源代码。
这是主要代码：
public class TestingActivity extends Activity implements OnClickListener {
String uname, pass, pic;
EditText txtUname, txtPass;
Button login;
TextView result, tview2, tview3;
String nameStartLine = " <td style=\"font:10px verdana; color:#312e25; text-align:right;\">Name:</td>";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
login=(Button)findViewById(R.id.button1);
result=(TextView)findViewById(R.id.textView1);
tview2=(TextView)findViewById(R.id.textView2);
tview3=(TextView)findViewById(R.id.textView3);
txtUname=(EditText)findViewById(R.id.editText1);
txtPass=(EditText)findViewById(R.id.editText2);
login.setOnClickListener(this);
}
public void postLoginData() {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://students.usls.edu.ph/login.cfm");
try {
String username = txtUname.getText().toString();
String password = txtPass.getText().toString();
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("username",username));
nameValuePairs.add(new BasicNameValuePair("password",password));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
String str = inputStreamToString(response.getEntity().getContent()).toString();
result.setText(str);
Intent intent = new Intent(TestingActivity.this,panel_1.class);
intent.putExtra("result",result.getText());
pic = "http://teachers.usls.edu.ph/student_pics/" + txtUname.getText() + ".jpg";
intent.putExtra("pic",pic);
startActivity(intent);
}
catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private StringBuilder inputStreamToString(InputStream is) {
String line = "";
StringBuilder total = new StringBuilder();
// Wrap a BufferedReader around the InputStream
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
// Read response until the end
try{
while ((line = rd.readLine()) != null) {
if (line.equals(nameStartLine)) {
line = rd.readLine();
StringTokenizer st = new StringTokenizer(line, ">< ");
String marker = st.nextToken();
while(st.hasMoreTokens()) {
if(marker.equals("strong")) {
marker = st.nextToken();
while(!(marker.equals("/strong"))) {
total.append(marker + " ");
marker = st.nextToken();
}
}
marker = st.nextToken();
}
}
}
}
catch (IOException e) {
e.printStackTrace();
}
// Return full string
return total;
}
public void onClick(View view) {
if(view == login){ postLoginData(); }
}
}
这是第二个活动：
public class panel_1 extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
TextView result = (TextView)findViewById(R.id.txtresult);
result.setText(""+getIntent().getExtras().getString("result"));
//set position
WebView myWebView = (WebView) findViewById(R.id.webView1);
myWebView.loadUrl(getIntent().getExtras().getString("pic"));
}
}
如您所见，程序将参数传递给http://students.usls.edu.ph/login.cfm. 成功登录后，它将获得主页的 HTML 源代码，我在其中获得学生的姓名和照片。那么如何将程序重定向到此链接并查看其 HTML 源代码，以便从中获取重要数据？我再次尝试使用httpclient，但它显示了登录页面的 HTML 源代码，或者http://students.usls.edu.ph/login.cfm即使我已经登录。