我试图让我的代码通过意图传递boolean extra但我失败了。我调试并观察到我的活动“B”将EXTRA_IS_ADDED的值指定为true，正如我想的那样比调用startActivity(intent)时，在我的活动“A”中，我无法正确使用此数据来指定isAdded的值。
这是我打电话给的活动A：
package com.example.recepinanc.whenfreedeneme;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
/**
* Created by recepinanc on 10/10/15.
*/
public class WorksActivity extends AppCompatActivity {
private Boolean isAdded;
private ListView todoListView;
private ArrayList<Work> works;
private Context mContext;
private int year;
private int month;
private int day;
private int hour;
private int minute;
private String title;
private String category;
//TODO Add school social todo overall buttons.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.works_activity_layout);
Log.i("WorksActivity", "works activity'te");
mContext = getApplicationContext();
works = new ArrayList<Work>();
}
@Override
protected void onResume() {
super.onResume();
isAdded = getIntent().getBooleanExtra(AddWorkActivity.EXTRA_IS_ADDED, false);
year = getIntent().getIntExtra(AddWorkActivity.EXTRA_YEAR, 0);
month = getIntent().getIntExtra(AddWorkActivity.EXTRA_MONTH, 0);
day = getIntent().getIntExtra(AddWorkActivity.EXTRA_DAY,0);
hour = getIntent().getIntExtra(AddWorkActivity.EXTRA_HOUR,0);
minute = getIntent().getIntExtra(AddWorkActivity.EXTRA_MINUTE,0);
title = getIntent().getStringExtra(AddWorkActivity.EXTRA_TITLE);
category = getIntent().getStringExtra(AddWorkActivity.EXTRA_CATEGORY);
//TODO isAdded True pass edilemiyor
Log.i("is_Added",isAdded.toString());
if (isAdded) {
//TODO examine the true isAdded case.
Log.i("isAddedTrue",isAdded.toString());
Work work = new Work();
Log.i("isAddedTrue","work creationdan sonra");
work.setmTitle(title);
work.setmCategory(category);
work.setmYear(year);
work.setmMonth(monthConverter(month));
work.setmDay(day);
work.setmHour(hour);
work.setmMinute(minuteConverter(minute));
Log.i("isAddedTrue", "work.setlerden sonra");
//works.add(work);
updateArray(works, work);
Log.i("isAddedTrue", "work.array addden sonra");
Toast.makeText(WorksActivity.this, "NEWBIE ADDED.", Toast.LENGTH_SHORT).show();
isAdded = false;
Log.i("isAddedTrue", "work is added false setden sivvaliiiiiim sonra");
}
Log.i("isAddedTrue", "listview found");
todoListView = (ListView) findViewById(R.id.listView);
Log.i("isAddedTrue", "listview founddan sonra");
todoListView.setAdapter(new WorkAdapter(getApplicationContext(), works));
Log.i("isAddedTrue", "listAdapter setten sonra");
}
public void updateArray(ArrayList<Work> works, Work work) {
//Add a new item add its date and update the array
works.add(work);
Toast.makeText(WorksActivity.this, "A new work is created! " +
"\n" + work.getmTitle() +
"\n" + work.getmCategory() +
"\n" + work.getmDay() +
"\n" + work.getmMonth() +
"\n" + work.getmYear() +
"\n" + work.getmHour() +
"\n" + work.getmMinute(), Toast.LENGTH_LONG).show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_action:
Intent intent = new Intent(WorksActivity.this, AddWorkActivity.class);
Log.i("WorksActivity", "Created intent");
startActivity(intent);
Log.i("WorksActivity", "Started Activity");
break;
default:
Log.e("WorksActivity", "INVALID BUTTON");
break;
}
return true;
}
public String monthConverter(int month) {
switch (month + 1) {
case 1:
return "January";
case 2:
return "February";
case 3:
return "March";
case 4:
return "April";
case 5:
return "May";
case 6:
return "June";
case 7:
return "July";
case 8:
return "August";
case 9:
return "September";
case 10:
return "October";
case 11:
return "November";
case 12:
return "December";
default:
return "UNKNOWN";
}
}
public String minuteConverter(int minute) {
if (minute / 10 <= 0)
return "0" + minute;
else
return minute + "";
}
}
这是我的第二个-B-活动：
package com.example.recepinanc.whenfreedeneme;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import java.util.Calendar;
/**
* Created by recepinanc on 11/10/15.
*/
public class AddWorkActivity extends AppCompatActivity {
public static final String EXTRA_TITLE = "title";
public static final String EXTRA_CATEGORY = "category";
public static final String EXTRA_YEAR = "year";
public static final String EXTRA_MONTH = "month";
public static final String EXTRA_DAY = "day";
public static final String EXTRA_HOUR = "hour";
public static final String EXTRA_MINUTE = "minute";
public static final String EXTRA_IS_ADDED = "isAdded";
static final int DATE_DIALOG_ID = 999;
static final int TIME_DIALOG_ID = 111;
private EditText title;
private RadioGroup categoryRadioGroup;
private TextView datePicker;
private TextView timePicker;
private int year;
private int month;
private int day;
private int hour;
private int minute;
private boolean is24HourView = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_work_acitivity_layout);
Log.i("AddWorkActivity","addwork'te");
title = (EditText) findViewById(R.id.todoTitle_editText);
categoryRadioGroup = (RadioGroup) findViewById(R.id.category_radioGroup);
datePicker = (TextView) findViewById(R.id.dateSpinner_textView);
timePicker = (TextView) findViewById(R.id.timeSpinner_textView);
Calendar calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
hour = calendar.get(Calendar.HOUR_OF_DAY);
minute = calendar.get(Calendar.MINUTE);
setDateOnView();
datePicker.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//todo call the create dialog method here.
showDialog(DATE_DIALOG_ID);
}
});
timePicker.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//todo call create dialog for time picker.
showDialog(TIME_DIALOG_ID);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
//set date as the current date
return new DatePickerDialog(this, dateSetListener, year, month, day);
case TIME_DIALOG_ID:
//set time as the current time
return new TimePickerDialog(this, timeSetListener, hour, minute, is24HourView);
}
return null;
}
private DatePickerDialog.OnDateSetListener dateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDay) {
//assign selected values
year = selectedYear;
month = selectedMonth;
day = selectedDay;
//update the textView to selected date
setDateAsText(datePicker);
}
};
private TimePickerDialog.OnTimeSetListener timeSetListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int selectedHour, int selectedMinute) {
//assign the selected time
hour = selectedHour;
minute = selectedMinute;
setTimeAsText(timePicker);
}
};
private void setDateOnView() {
setDateAsText(datePicker);
setTimeAsText(timePicker);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// handle item selection
switch (item.getItemId()) {
case R.id.cancel_action:
//TODO Make this return to its activity
finish();
break;
case R.id.save_action:
//TODO Get info and pass it to the activity's updateArrayMethodString category = "";
String category = "";
int checkedRadioID = categoryRadioGroup.getCheckedRadioButtonId();
switch (checkedRadioID) {
case R.id.todo_radioButton:
category = "To-Do";
break;
case R.id.school_radioButton:
category = "School";
break;
case R.id.social_radioButton:
category = "Social";
break;
default:
Log.e("WorksActivity", "Unexpected RadioButton ID");
break;
}
//pass data via intent
Intent intent = new Intent(getBaseContext(), WorksActivity.class);
intent.putExtra(EXTRA_TITLE, title.getText().toString());
intent.putExtra(EXTRA_CATEGORY, category);
intent.putExtra(EXTRA_HOUR, hour);
intent.putExtra(EXTRA_MINUTE, minute);
intent.putExtra(EXTRA_YEAR, year);
intent.putExtra(EXTRA_MONTH, month);
intent.putExtra(EXTRA_DAY, day);
intent.putExtra(EXTRA_IS_ADDED, true);
Log.i("Addworkacitivty", "add work activity intent");
startActivity(intent);
break;
default:
break;
}
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_add_activity, menu);
return true;
}
public String monthConverter(int month) {
switch (month + 1) {
case 1:
return "JANUARY";
case 2:
return "FEBRUARY";
case 3:
return "MARCH";
case 4:
return "APRIL";
case 5:
return "MAYY";
case 6:
return "JUNE";
case 7:
return "JULY";
case 8:
return "AUGUST";
case 9:
return "SEPTEMBER";
case 10:
return "OCTOBER";
case 11:
return "NOVEMBER";
case 12:
return "DECEMBER";
default:
return "UNKNOWN";
}
}
public String minuteConverter(int minute) {
if (minute / 10 <= 0)
return "0" + minute;
else
return minute + "";
}
public void setDateAsText(TextView datePicker) {
datePicker.setText(new StringBuilder().append(day).append(" ")
.append(monthConverter(month)).append(" ").append(year));
}
public void setTimeAsText(TextView timePicker) {
timePicker.setText(new StringBuilder().append(hour).append(":").append(minuteConverter(minute)));
}
}
这是我的适配器：
package com.example.recepinanc.whenfreedeneme;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
/**
* Created by recepinanc on 11/10/15.
*/
public class WorkAdapter extends BaseAdapter {
private Context mContext;
ArrayList<Work> works;
public WorkAdapter(Context applicationContext, ArrayList<Work> works) {
this.mContext = applicationContext;
this.works = works;
}
@Override
public int getCount() {
return works.size();
}
@Override
public Object getItem(int position) {
return works.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//Upgrade this to view holder.
View v;
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = layoutInflater.inflate(R.layout.work_item_layout, parent, false);
TextView title = (TextView) v.findViewById(R.id.title_textView);
TextView category = (TextView) v.findViewById(R.id.category_textView);
TextView date = (TextView) v.findViewById(R.id.date_textView);
TextView time = (TextView) v.findViewById(R.id.time_textView);
Work work = works.get(position);
titleResizer(title, work.getmTitle());
category.setText(work.getmCategory());
date.setText(new StringBuilder().append(work.getmDay()).append(" ")
.append(work.getmMonth()).append(" ").append(work.getmYear()));
time.setText(new StringBuilder().append(work.getmHour())
.append(":").append(work.getmMinute()));
} else {
v = convertView;
}
return v;
}
public void titleResizer(TextView title, String titleText){
if (titleText.length() > 25)
title.setTextSize(12);
else if (titleText.length() > 20)
title.setTextSize(15);
else if (titleText.length() > 15 )
title.setTextSize(18);
else if (titleText.length() > 10 )
title.setTextSize(20);
else
title.setTextSize(25);
title.setText(titleText);
}
}
答案 0 :(得分：1)
请注意，getBoolean返回boolean（Primitive类型）而不是Boolean。
来自文档：
public boolean getBooleanExtra（String name，boolean defaultValue）
在API级别1中添加从意图中检索扩展数据。
参数name所需项目的名称。 defaultValue该值 如果没有存储所需类型的值，则返回 给定的名称。返回先前添加的项的值 putExtra（）或默认值（如果未找到）。也可以看看 putExtra（String，boolean）
更改
displayEventTime: false
到
private Boolean isAdded;答案 1 :(得分：1)
我已将原始评论移至答案，因此您可以将问题标记为已解决。 ;）
var x = 0;
是private Boolean isAdded;（对象）而不是Boolean（原始类型），所以这里可能会发生一些自动装箱和拆箱。我无法发现任何其他内容，但可能值得尝试将其更改为boolean