抱歉，如果标题格式不正确。基本上这是我的问题：我的 Android 项目是一个 REST 客户端。webservice 项目包含一些数据，这些数据基本上可以为一个人制作个人资料（名字、姓氏等）。在我的 Android 客户端中，我有一个活动，上面有一个文本字段和一个按钮。Main 活动中的文本字段是用户输入帐号 (id=enter_acct) 的地方，该帐号指向特定人员，其详细信息在 Web 服务项目中。在我的 MainActivity java 文件中，我告诉按钮打开一个包含文本字段的新活动。换句话说，Main Activity 包含执行 GET 请求的所有代码。辅助 Activity 只是一个包含文本字段的布局。这是我的主要布局文件代码：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
......
/>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
<EditText
android:id="@+id/enter_acct"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_alignParentLeft="true"
android:layout_marginBottom="20dp"
android:layout_marginLeft="34dp"
android:ems="10"
android:hint="@string/acct" />
<Button
android:id="@+id/search_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/textView1"
android:layout_toRightOf="@+id/textView1"
android:text="@string/searchText"
android:onClick="retrievePersonData"
/>
下面是 Main Activty java 文件中包含方法 retrievePersonData 的代码：
public class MainActivity extends Activity {
private static final String SERVICE_URL = "http://serverIP";
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnOpenNewActivity = (Button) findViewById(R.id.search_button);
btnOpenNewActivity .setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent myIntent = new Intent(MainActivity.this,PersonModel.class);
MainActivity.this.startActivity(myIntent);
}
});
}
catch (Exception e)
{
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void handleResponse(String response) {
EditText edFirstName = (EditText) findViewById(R.id.firstName);
EditText edLastName = (EditText) findViewById(R.id.lastName);
EditText edEmail = (EditText) findViewById(R.id.email);
EditText edAddress = (EditText) findViewById(R.id.address);
edFirstName.setText("");
edLastName.setText("");
edEmail.setText("");
edAddress.setText("");
try {
JSONObject jso = new JSONObject(response);
String firstName = jso.getString("firstName");
String lastName = jso.getString("lastName");
String email = jso.getString("email");
String address = jso.getString("address");
edFirstName.setText(firstName);
edLastName.setText(lastName);
edEmail.setText(email);
edAddress.setText(address);
} catch (Exception e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
}
public void hideKeyboard() {
InputMethodManager inputManager = (InputMethodManager) MainActivity.this.getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(MainActivity.this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
public class WebServiceTask extends AsyncTask<String, Integer, String> {
public static final int GET_TASK = 1;
public static final int POST_TASK = 2;
private static final String TAG = "WebServiceTask";
// connection timeout in milliseconds.. waiting for connect
private static final int CONN_TIMEOUT = 3000;
// socket timeout, in milisecs (waiting for data)...
private static final int SOCKET_TIMEOUT = 5000;
private int taskType = GET_TASK;
private Context mContext = null;
private String processMessage = "Processing...";
private ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
private ProgressDialog pDlg = null;
public WebServiceTask(int taskType, Context mContext, String processMessage) {
this.taskType = taskType;
this.mContext = mContext;
this.processMessage = processMessage;
}
public void addNameValuePair(String name, String value) {
params.add(new BasicNameValuePair(name, value));
}
private void showProgressDialog() {
pDlg = new ProgressDialog(mContext);
pDlg.setMessage(processMessage);
pDlg.setProgressDrawable(mContext.getWallpaper());
pDlg.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pDlg.setCancelable(false);
pDlg.show();
}
@Override
protected void onPreExecute() {
hideKeyboard();
showProgressDialog();
}
protected String doInBackground(String... urls) {
String url = urls[0];
String result = "";
HttpResponse response = doResponse(url);
if(response == null) {
return result;
} else {
try {
result = inputStreamToString(response.getEntity().getContent());
} catch (IllegalStateException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
}
return result;
}
@Override
public void onPostExecute(String response) {
handleResponse(response);
pDlg.dismiss();
}
public HttpParams getHttpParams() {
HttpParams httpa = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpa, CONN_TIMEOUT);
HttpConnectionParams.setSoTimeout(httpa, SOCKET_TIMEOUT);
return httpa;
}
public HttpResponse doResponse(String url) {
HttpClient hClient = new DefaultHttpClient(getHttpParams());
HttpResponse response = null;
try {
switch (taskType) {
case POST_TASK:
HttpPost httppost = new HttpPost(url);
httppost.setEntity(new UrlEncodedFormEntity(params));
response = hClient.execute(httppost);
break;
case GET_TASK:
HttpGet httpget = new HttpGet(url);
response = hClient.execute(httpget);
break;
}
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
return response;
}
private String inputStreamToString(InputStream is) {
String line = "";
StringBuilder total = new StringBuilder();
BufferedReader bf = new BufferedReader(new InputStreamReader(is));
try {
while ((line = bf.readLine()) != null) {
total.append(line);
}
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
return total.toString();
}
}
当我单击按钮时，它应该做两件事：
使用文本字段打开一个新活动。
使用来自 Web 服务项目的信息填充这些文本字段。
如果我有一个带有文本字段和按钮的活动（即，我单击它与 Web 服务对话并用信息填充字段），这工作得很好。在这种情况下，我单击按钮，它会打开新活动，但不会填充文本字段......它什么也不做。
有人可以帮忙吗，如果需要更清楚，我会的。任何帮助是极大的赞赏。