关于android：我无法传递和检索intent boolean extra


I cannot pass and retrieve intent boolean extra

我试图让我的代码通过boolean额外的意图，但我失败了。我调试并观察到，我的活动"b"分配EDOCX1的值(0)作为true，正如我想的那样，但比我调用startActivity(intent)时，在我的活动"a"中，我不能正确地使用这些数据来分配isAdded的值。

以下是我所说的活动A：

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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!" +
               "
" + work.getmTitle() +
               "
" + work.getmCategory() +
               "
" + work.getmDay() +
               "
" + work.getmMonth() +
               "
" + work.getmYear() +
               "
" + work.getmHour() +
               "
" + 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 +"";
    }

}

这是我的第二次-B-活动：

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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：

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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);
    }
}
相关讨论

我已将原始评论移至答案，以便您将问题标记为已解决。；)

private Boolean isAdded;是Boolean对象，而不是Boolean原始类型，因此这里可能会发生一些自动装箱和拆箱。我找不到任何其他东西，但可能值得把它改成private Boolean isAdded;。

注意，getBoolean返回的是Boolean(基元类型)而不是Boolean。

来自文档：

public boolean getBooleanExtra (String name, boolean defaultValue)

Added in API level 1 Retrieve extended data from the intent.

Parameters name The name of the desired item. defaultValue the value
to be returned if no value of the desired type is stored with the
given name. Returns the value of an item that previously added with
putExtra() or the default value if none was found. See Also
putExtra(String, boolean)

变化

private Boolean isAdded;

到

1
private boolean isAdded;
相关讨论