以下是我的代码，
public class Assignment_Create extends Activity implements OnClickListener {
DataManipulator dataManipulator;
static final int DIALOG_ID = 1;
AlertDialog.Builder dialogAc;
ImageView imageViewDateAssign, imageViewDueDate, imageViewSubmit;
TextView textViewDtAssign, textViewDueDt;
EditText editTextTitle, editTextDesc;
static final int DATE_DIALOG_ID = 0;
int cDay, cMonth, cYear;
private TextView activeDateDisplay;
private Calendar activeDate;
// Update database
String updateId;
public boolean isEdit;
@Override
public void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.assignment_create);
imageViewDateAssign = (ImageView) findViewById(R.id.dateassign);
imageViewDueDate = (ImageView) findViewById(R.id.duedate);
imageViewSubmit = (ImageView) findViewById(R.id.submit);
textViewDtAssign = (TextView) findViewById(R.id.textViewDateAssign);
textViewDueDt = (TextView) findViewById(R.id.textViewDueDate);
editTextTitle = (EditText) findViewById(R.id.title);
editTextDesc = (EditText) findViewById(R.id.description);
isEdit = getIntent().getExtras().getBoolean("isEdit");
updateId = getIntent().getExtras().getString("idNo");
if (isEdit) {
editTextTitle.setText(getIntent().getExtras().getString(
"AsmntTitle"));
editTextDesc
.setText(getIntent().getExtras().getString("AsmntDesc"));
}
Code.AssignDate = Calendar.getInstance();
Code.DueDate = Calendar.getInstance();
imageViewDateAssign.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
showDateDialog(textViewDtAssign, Code.AssignDate);
}
});
imageViewDueDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
showDateDialog(textViewDueDt, Code.DueDate);
}
});
imageViewSubmit.setOnClickListener(this);
updateDisplay(textViewDtAssign, Code.AssignDate);
updateDisplay(textViewDueDt, Code.DueDate);
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.submit:
Code.title = editTextTitle.getText().toString().trim();
Code.description = editTextDesc.getText().toString().trim();
Code.diff = Code.DueDate.getTimeInMillis()
- Code.AssignDate.getTimeInMillis();
Code.days = Code.diff / (24 * 60 * 60 * 1000);
Code.strDays = String.valueOf(Code.days);
if (isEdit) {
this.dataManipulator = new DataManipulator(this);
this.dataManipulator.update(updateId);
this.dataManipulator.close();
} else {
this.dataManipulator = new DataManipulator(this);
this.dataManipulator.insert(Code.title, Code.description,
Code.strDays);
this.dataManipulator.close();
}
if (Code.title.length() <= 0 || Code.description.length() <= 0) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
Assignment_Create.this);
alertDialogBuilder.setTitle("Your Title");
alertDialogBuilder
.setMessage("Click yes to exit!")
.setCancelable(false)
.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
Toast.makeText(getApplicationContext(), "Not proper date",
Toast.LENGTH_LONG).show();
}
Toast.makeText(getApplicationContext(),
"Details are saved successfully", Toast.LENGTH_LONG).show();
Toast.makeText(getApplicationContext(),
"Assignment Created Succesfully", Toast.LENGTH_LONG).show();
Assignment_Create.this.finish();
break;
}
}
private void updateDisplay(TextView dateDisplay, Calendar date) {
dateDisplay.setText(new StringBuilder()
// Month is 0 based so add 1
.append(date.get(Calendar.MONTH) + 1).append("-")
.append(date.get(Calendar.DAY_OF_MONTH)).append("-")
.append(date.get(Calendar.YEAR)).append(" "));
}
@SuppressWarnings("deprecation")
public void showDateDialog(TextView dateDisplay, Calendar date) {
activeDateDisplay = dateDisplay;
activeDate = date;
showDialog(DATE_DIALOG_ID);
}
private OnDateSetListener dateSetListener = new OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
activeDate.set(Calendar.YEAR, year);
activeDate.set(Calendar.MONTH, monthOfYear);
activeDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateDisplay(activeDateDisplay, activeDate);
unregisterDateDisplay();
}
};
private void unregisterDateDisplay() {
activeDateDisplay = null;
activeDate = null;
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this, dateSetListener,
activeDate.get(Calendar.YEAR),
activeDate.get(Calendar.MONTH),
activeDate.get(Calendar.DAY_OF_MONTH));
}
return null;
}
@SuppressWarnings("deprecation")
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
switch (id) {
case DATE_DIALOG_ID:
((DatePickerDialog) dialog).updateDate(
activeDate.get(Calendar.YEAR),
activeDate.get(Calendar.MONTH),
activeDate.get(Calendar.DAY_OF_MONTH));
break;
}
}
}
一切正常，但是当我将两个编辑文本都留空时，它应该显示警告对话框，但不是这样，它给出了Activity已泄露窗口的错误。
下面是我的logcat ......
12-24 11:32:55.995: E/WindowManager(1940): Activity iqualtech.skirr.Assignment_Create has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@420cf5b0 that was originally added here
12-24 11:32:55.995: E/WindowManager(1940): android.view.WindowLeaked: Activity iqualtech.skirr.Assignment_Create has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@420cf5b0 that was originally added here
12-24 11:32:55.995: E/WindowManager(1940): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:363)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:268)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:216)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:141)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.Window$LocalWindowManager.addView(Window.java:537)
12-24 11:32:55.995: E/WindowManager(1940): at android.app.Dialog.show(Dialog.java:278)
12-24 11:32:55.995: E/WindowManager(1940): at iqualtech.skirr.Assignment_Create.onClick(Assignment_Create.java:132)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.View.performClick(View.java:3517)
12-24 11:32:55.995: E/WindowManager(1940): at android.view.View$PerformClick.run(View.java:14155)
12-24 11:32:55.995: E/WindowManager(1940): at android.os.Handler.handleCallback(Handler.java:605)
12-24 11:32:55.995: E/WindowManager(1940): at android.os.Handler.dispatchMessage(Handler.java:92)
12-24 11:32:55.995: E/WindowManager(1940): at android.os.Looper.loop(Looper.java:154)
12-24 11:32:55.995: E/WindowManager(1940): at android.app.ActivityThread.main(ActivityThread.java:4624)
12-24 11:32:55.995: E/WindowManager(1940): at java.lang.reflect.Method.invokeNative(Native Method)
12-24 11:32:55.995: E/WindowManager(1940): at java.lang.reflect.Method.invoke(Method.java:511)
12-24 11:32:55.995: E/WindowManager(1940): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
12-24 11:32:55.995: E/WindowManager(1940): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
12-24 11:32:55.995: E/WindowManager(1940): at dalvik.system.NativeStart.main(Native Method)
我尝试了以下一些链接
https://stackoverflow.com/search?q=activity+has+leaked+windows+in+android
但是我没有得到我需要的什么以及确切的地方。如果编辑文本都为空，我只想在提交按钮单击事件上显示警告对话框。任何帮助，将不胜感激。先感谢您。
答案 0 :(得分：8)
您在致电Assignment_Create.this.finish();后直接致电dialog.show()。这意味着当您的活动被销毁时，对话框在屏幕上，这会导致泄露的窗口异常。您需要在致电dialog.dismiss()之前致电this.finish()关闭所有对话框。
您有两种选择：
this.finish()移至您的onClickListene r内
警报对话框。这就是我认为你想要的，以便活动
只有当用户在对话框中单击“确定”时才会完成。alertdialog.finish()之前直接致电this.finish()。答案 1 :(得分：0)
Assignment_Create.this.finish();
上述声明将导致活动遭到破坏，但您的警报对话框仍处于打开状态。
您需要确保在销毁活动之前需要关闭警报对话框。这样就可以防止出现这种异常。
可能的解决方案：
我认为您希望在某些特定情况下完成，但目前完成对于R.id.submit中的所有情况都有效。
答案 2 :(得分：0)
删除Assignment_Create.this.finish（）;