我制作了一个将日期发送到mysql的Android应用程序。它很成功，然后我尝试制作一个标签小部件。这两个选项卡包含相同的代码，但现在是两个不同的类，在执行此操作后，日期选择器对话框在激活时开始崩溃。
导致这种情况的原因是什么？
logcat报告
02-03 16:32:15.797: E/AndroidRuntime(1445): FATAL EXCEPTION: main
02-03 16:32:15.797: E/AndroidRuntime(1445): android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@533459e0 is not valid; is your activity running?
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.view.ViewRootImpl.setView(ViewRootImpl.java:567)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:246)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.app.Dialog.show(Dialog.java:281)
02-03 16:32:15.797: E/AndroidRuntime(1445): at com.example.androidtablayout.VacLeave$2.onClick(VacLeave.java:129)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.view.View.performClick(View.java:4204)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.view.View$PerformClick.run(View.java:17355)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.os.Handler.handleCallback(Handler.java:725)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.os.Handler.dispatchMessage(Handler.java:92)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.os.Looper.loop(Looper.java:137)
02-03 16:32:15.797: E/AndroidRuntime(1445): at android.app.ActivityThread.main(ActivityThread.java:5041)
02-03 16:32:15.797: E/AndroidRuntime(1445): at java.lang.reflect.Method.invokeNative(Native Method)
02-03 16:32:15.797: E/AndroidRuntime(1445): at java.lang.reflect.Method.invoke(Method.java:511)
02-03 16:32:15.797: E/AndroidRuntime(1445): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-03 16:32:15.797: E/AndroidRuntime(1445): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-03 16:32:15.797: E/AndroidRuntime(1445): at dalvik.system.NativeStart.main(Native Method)
datepicker的代码 VacLeave.java
public class VacLeave extends Activity implements OnClickListener {
Button btnCreateProduct;
ListView listView;
String[] trans;
// Session Manager Class
SessionManager session;
JSONParser jsonParser = new JSONParser();
ProgressDialog mProgressDialog;
JSONArray jsonarray;
EditText inputName;
String username;
EditText inputStart;
EditText inputEnd;
Button btnLogout;
Calendar myCalendar = Calendar.getInstance();
private String url = "http://10.0.3.2/sunshine-ems/vac.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.leave);
inputName = (EditText) findViewById(R.id.inputName);
inputStart = (EditText) findViewById(R.id.inputStart);
inputEnd = (EditText) findViewById(R.id.inputEnd);
btnCreateProduct = (Button) findViewById(R.id.btnCreateProduct);
inputStart.setOnClickListener(new OnClickListener() {
public void onClick(View view)
{
int mYear, mMonth, mDay;
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
DatePickerDialog dpd = new DatePickerDialog(VacLeave.this,
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int month, int day) {
c.set(year, month, day);
String date = new SimpleDateFormat("yyyy/MM/dd").format(c.getTime());
inputStart.setText(date);
int mYear = c.get(Calendar.YEAR);
int mMonth = c.get(Calendar.MONTH);
int mDay = c.get(Calendar.DAY_OF_MONTH);
}
}, mYear, mMonth, mDay);
if(!((Activity) VacLeave.this).isFinishing())
{
dpd.show();
}
}
});
inputEnd.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mYear, mMonth, mDay;
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
DatePickerDialog dpd = new DatePickerDialog(VacLeave.this,
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int month, int day) {
c.set(year, month, day);
String date = new SimpleDateFormat("yyyy/MM/dd").format(c.getTime());
inputEnd.setText(date);
int mYear = c.get(Calendar.YEAR);
int mMonth = c.get(Calendar.MONTH);
int mDay = c.get(Calendar.DAY_OF_MONTH);
}
}, mYear, mMonth, mDay);
if(!((Activity) VacLeave.this).isFinishing())
{
dpd.show();
}
}
});
// CHECK TO LOGIN SESSION
session = new SessionManager(getApplicationContext());
session.checkLogin();
btnLogout = (Button) findViewById(R.id.btnLogout);;
btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
// Launching All products Activity
session.logoutUser();
Intent i = new Intent(getApplicationContext(), Login.class);
startActivity(i);
}
});
btnCreateProduct.setOnClickListener(this);
}
private class Submit extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(VacLeave.this);
// Set progressdialog title
mProgressDialog.setTitle("Processing Leave request");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
@Override
protected String doInBackground(String... args) {
int success;
Spinner mySpinner=(Spinner) findViewById(R.id.spinner);
username = session.getUsername();
List<NameValuePair> params1 = new ArrayList<NameValuePair>();
String reason = inputName.getText().toString();
String start = inputStart.getText().toString();
String end = inputEnd.getText().toString();
String status ="pending";
String leavetype="vacation";
//String leavetype = mySpinner.getSelectedItem().toString();
try {
params1.add(new BasicNameValuePair("reason", reason));
params1.add(new BasicNameValuePair("username", username));
params1.add(new BasicNameValuePair("start", start));
params1.add(new BasicNameValuePair("end", end));
params1.add(new BasicNameValuePair("leavetype", leavetype));
params1.add(new BasicNameValuePair("status", status));
Log.d("request!", "starting");
JSONObject json = jsonParser.makeHttpRequest(url, "POST",
params1);
// full json response
Log.d("Payment attempt", json.toString());
// json success element
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
mProgressDialog.dismiss();
if (file_url != null) {
Toast.makeText(VacLeave.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
/**
* Logout button click event
* */
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnCreateProduct:
if ( checkValidation () )
new Submit().execute();
else
Toast.makeText(VacLeave.this, "Required field(s)", Toast.LENGTH_LONG).show();
}
}
private boolean checkValidation() {
boolean ret = true;
if (!Validation.hasText(inputName)) ret = false;
if (!Validation.hasText(inputStart)) ret = false;
if (!Validation.hasText(inputEnd)) ret = false;
return ret;
}
}
答案 0 :(得分：1)
当尝试显示对话框时，调用对话框的活动由于某种原因而完成时会发生这种情况。
这是你可以做的
替换
dpd.show();
与
if(!((Activity) SickLeave.this).isFinishing())
{
dpd.show();
}