Question

我正在使用tabWidget。当我第一次从父课到子课时，我有一个日期选择器，并选择日期工作正常，当我再次从父类再到子类并选择日期时，应用程序崩溃与logcat结果“无法添加窗口“

它第一次正常工作，但下次没有代码如下

import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
public class PlaceOrder extends Activity {
    public TextView tvDisplayDate,personName,Cname,cAdrress;
    public DatePicker dpResult;
    public Button btnChangeDate;
    Button cancel,submit;
    public int year;
    public int month;
    public int day;
    int requestCode;
    int resultCode;
    Intent data;
    String Name,cName,Title,Address,Phone,Email;
    static final int DATE_DIALOG_ID = 0;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.placeorder);
        personName=(TextView)findViewById(R.id.firstName);
        Cname=(TextView)findViewById(R.id.Cname);
        cAdrress=(TextView)findViewById(R.id.CAddname);
        personName.setText(AccountInfo.fnameNlName);
        Cname.setText(AccountInfo.cName);
        cAdrress.setText(AccountInfo.cAdd);
        setCurrentDateOnView();
        addListenerOnButton();
        final PlaceOrder PO = this;
        cancel=(Button)findViewById(R.id.Cancel);
        cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if(FastPkgMainActivity.fastPackge==1)
                {
                    Intent fastPkgQuote = new Intent(v.getContext(), FastPkgQuote.class);
                    StringBuffer urlString = new StringBuffer();
                    FastPkgQuote parentActivity = (FastPkgQuote)getParent();
                    parentActivity.replaceContentView("fastpkg1", fastPkgQuote);
                }
                else if(FastPkgMainActivity.fastPackge==2)
                {
                    Intent fastpkgQuoteNew = new Intent(v.getContext(), FastPkgQuoteNew.class);
                    StringBuffer urlString = new StringBuffer();
                    FastPkgQuoteNew parentActivity = (FastPkgQuoteNew)getParent();
                    parentActivity.replaceContentView1("fastPkg2", fastpkgQuoteNew);
                }
                // TO*DO Auto-generated method stub
            }
        }
        );
        submit=(Button)findViewById(R.id.Submit);
        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    Name=AccountInfo.fnameNlName.toString();
                    cName=AccountInfo.cName.toString();
                    Title=AccountInfo.title.toString();
                    Address=AccountInfo.cAdd.toString();
                    Phone=AccountInfo.phno.toString();
                    Email=AccountInfo.E_ID.toString();
                }
                catch (NullPointerException e) {
                    Name=" ";
                    cName=" ";
                    Title=" ";
                    Address=" ";
                    Phone=" ";
                    Email=" ";
                }
                // TODO Auto-generated method stub
                Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
                //String[] recipients = new String[]{
                    "mymail@email.com", "sales@fastpkg.com",
                }
                ;
                emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
                new String[] {
                    "sales@fastpkg.com"
                }
                );
                emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Placing an Order");
                emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "CustomerDetails       " +
                " Name"+":  "+Name+
                "CompanyName:"+"  "+cName+
                "Title :"+Title+
                "Address: "+Address+
                "Phone #: "+Phone+
                "Email :"+Email
                );
                emailIntent.setType("text/plain");
                startActivityForResult(Intent.createChooser(emailIntent, "Send mail client :"),RESULT_OK);
                onActivityResult(requestCode, resultCode, data);
            }
        }
        );
    }
    protected void onActivityResult(int requestCode, int resultCode,
    Intent data) {
        if (requestCode == 0) {
            if (resultCode == RESULT_CANCELED) {
                if(FastPkgMainActivity.fastPackge==1)
                {
                    Intent fastpkgQuote = new Intent();
                    StringBuffer urlString = new StringBuffer();
                    fastpkgQuote.setClass(getParent(), FastPkgQuote.class);
                    FastPkgQuote parentActivity = (FastPkgQuote)getParent();
                    parentActivity.replaceContentView("fastPkg2", fastpkgQuote);
                }
                else if(FastPkgMainActivity.fastPackge==2)
                {
                    Intent fastpkgQuoteNew = new Intent();
                    StringBuffer urlString = new StringBuffer();
                    fastpkgQuoteNew.setClass(getParent(),
                    FastPkgQuoteNew.class);
                    FastPkgQuoteNew parentActivity =
                    (FastPkgQuoteNew)getParent();
                    parentActivity.replaceContentView1("fastPkg2",
                    fastpkgQuoteNew);
                }
            }
            else if(resultCode==RESULT_OK)
            {
                final PlaceOrder pOrder = this;
                Intent intent = new Intent();
                intent.setClass(pOrder, ThnkYouPage.class);
                startActivity(intent);
            }
        }
    }
    // display current date
    public void setCurrentDateOnView() {
        tvDisplayDate = (TextView) findViewById(R.id.tvDate);
        dpResult = (DatePicker) findViewById(R.id.dpResult);
        dpResult.setVisibility(View.INVISIBLE);
        final Calendar c = Calendar.getInstance();
        year = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day = c.get(Calendar.DAY_OF_MONTH);
        // set current date into textview
        tvDisplayDate.setText(new StringBuilder()
        // Month is 0 based, just add 1
        .append(month + 1).append("-").append(day).append("-")
        .append(year).append(" "));
        // set current date into datepicker
        dpResult.init(year, month, day, null);
    }
    public void addListenerOnButton() {
        btnChangeDate = (Button) findViewById(R.id.btnChangeDate);
        btnChangeDate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(DATE_DIALOG_ID);
            }
        }
        );
    }
    @Override
    public  Dialog onCreateDialog(int id) {
        switch (id) {
            case DATE_DIALOG_ID:
            // set date picker as current date
            return new DatePickerDialog(this.getParent(), datePickerListener, year, month,
            day);
        }
        return null;
    }
    public  DatePickerDialog.OnDateSetListener datePickerListener = new
    DatePickerDialog.OnDateSetListener() {
        // when dialog box is closed, below method will be called.
        public void onDateSet(DatePicker view, int selectedYear,
        int selectedMonth, int selectedDay) {
            year = selectedYear;
            month = selectedMonth;
            day = selectedDay;
            // set selected date into textview
            tvDisplayDate.setText(new StringBuilder().append(month + 1)
            .append("-").append(day).append("-").append(year)
            .append(" "));
            // set selected date into datepicker also
            dpResult.init(year, month, day, null);
        }
    }
    ;
}

Answer 1

在OnCreateDialog方法中，在行中：

return new DatePickerDialog(this.getParent(), datePickerListener, year, month,day);

使用application basecontext代替this.getparent()

它可能对你有帮助。

Answer 2

而不是这样做：

return new DatePickerDialog(this.getParent(), datePickerListener, year, month,
            day);

试试这个，看它是否有效：

return new DatePickerDialog(PlaceOrder.this, datePickerListener, year, month,
                day);

无法添加Window错误

2 个答案: