Question

[edit]我有三个部分：标题，状态，优先级，时间和日期，按顺序垂直对齐。我的问题是，当我setText（）'time'或'date'时，'Priority'部分和'Time and Date'部分会被提升。也就是说，“优先级”部分的标题与顶部栏完全对齐，“时间和日期”标题恰好与内容重叠（而不是在其下方）。

其他两个部分保留在他们的位置（在顶部），但它们重叠。

底部是图片。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <!-- Title -->

    <TextView
        android:id="@+id/TitleLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/title_string"
        android:textAppearance="?android:attr/textAppearanceLarge" >
    </TextView>

    <EditText
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/TitleLabel"
        android:layout_marginTop="0dp"
        android:ems="10"
        android:hint="@string/enter_title_string" 
        android:inputType="textShortMessage">

        <requestFocus />
    </EditText>

    <!-- Status -->

    <TextView
        android:id="@+id/status"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/title"
        android:layout_marginTop="25dp"
        android:text="@string/status_string"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <RadioGroup
        android:id="@+id/statusGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/status"
        android:orientation="horizontal"
        android:layout_marginTop="12dp" >

        <RadioButton
            android:id="@+id/statusDone"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/done_string" />

        <RadioButton
            android:id="@+id/statusNotDone"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="@string/not_done_string" />
    </RadioGroup>

    <!-- Priority -->

    <TextView
        android:id="@+id/priority"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/statusGroup"
        android:layout_marginTop="0dp"
        android:text="@string/priority_string"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <RadioGroup
        android:id="@+id/priorityGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/priority"
        android:orientation="horizontal"
        android:layout_marginTop="0dp"
        android:text="@string/priority_string" >

        <RadioButton
            android:id="@+id/lowPriority"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/priority_low_string" />

        <RadioButton
            android:id="@+id/medPriority"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="@string/priority_medium_string" />

        <RadioButton
            android:id="@+id/highPriority"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/priority_high_string" />
    </RadioGroup>

    <!-- Time and Date -->

    <TextView
        android:id="@+id/time_and_date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/priorityGroup"
        android:layout_marginTop="0dp"
        android:text="@string/time_and_date_string"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/time_and_date"
        android:layout_marginTop="0dp"
        android:text="@string/no_date_set_string" />

    <TextView
        android:id="@+id/time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/time_and_date"
        android:text="@string/no_time_set_string" />

    <Button
        android:id="@+id/date_picker_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/date"
        android:text="@string/choose_date_string" />

    <Button
        android:id="@+id/time_picker_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@id/date_picker_button"
        android:layout_below="@id/time"
        android:text="@string/choose_time_string" />

    <!-- Buttons -->

    <Button
        android:id="@+id/cancelButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginTop="0dp"
        android:text="@string/cancel_string" />

    <Button
        android:id="@+id/resetButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="@string/reset_string" />

    <Button
        android:id="@+id/submitButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:text="@string/submit_string" />

</RelativeLayout>

这是我用来设置它的方法。我通过评论内容和包含OR来玩，如果我设置了日期文本或时间文本，它们都会被提升。

以下是活动的完整代码：有关setText发生的位置，请参阅setDefaultDateTime。

package course.labs.todomanager;

import java.util.Calendar;
import java.util.Date;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;

public class AddToDoActivity extends Activity {

    // 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
    private static final int SEVEN_DAYS = 604800000;

    private static final String TAG = "Lab-UserInterface";

    private static String timeString;
    private static String dateString;
    private static TextView dateView;
    private static TextView timeView;


    private Date mDate;
    private RadioGroup mPriorityRadioGroup;
    private RadioGroup mStatusRadioGroup;
    private EditText mTitleText;
    private RadioButton mDefaultStatusButton;
    private RadioButton mDefaultPriorityButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.add_todo);

        mTitleText = (EditText) findViewById(R.id.title);
        mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
        mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
        mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
        mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
        dateView = (TextView) findViewById(R.id.date);
        timeView = (TextView) findViewById(R.id.time);

        // Set the default date and time

        setDefaultDateTime();

        // OnClickListener for the Date button, calls showDatePickerDialog() to show
        // the Date dialog

        final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
        datePickerButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                showDatePickerDialog();
            }
        });

        // OnClickListener for the Time button, calls showTimePickerDialog() to show
        // the Time Dialog

        final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
        timePickerButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                showTimePickerDialog();
            }
        });

        // OnClickListener for the Cancel Button, 

        final Button cancelButton = (Button) findViewById(R.id.cancelButton);
        cancelButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                log("Entered cancelButton.OnClickListener.onClick()");

                //TODO - Implement onClick().  
                setResult(RESULT_CANCELED);

                finish();
            }
        });

        //OnClickListener for the Reset Button

        final Button resetButton = (Button) findViewById(R.id.resetButton);
        resetButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                log("Entered resetButton.OnClickListener.onClick()");

                //TODO - Reset data fields to default values
                mTitleText.setText("");
                setDefaultDateTime();
                mStatusRadioGroup.setId(R.id.statusDone);
                mPriorityRadioGroup.setId(R.id.medPriority);
            }
        });

        // OnClickListener for the Submit Button
        // Implement onClick().

        final Button submitButton = (Button) findViewById(R.id.submitButton);
        submitButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                log("Entered submitButton.OnClickListener.onClick()");

                // Gather ToDoItem data  

                //TODO - Get Priority
                Priority priority = getPriority();

                //TODO -  Get Status
                Status status = getStatus();

                //TODO -  Title
                String titleString = mTitleText.getText().toString();

                // Date
                String fullDate = dateString + " " + timeString;

                // Package ToDoItem data into an Intent
                Intent data = new Intent();
                ToDoItem.packageIntent(data, titleString, priority, status, fullDate);

                //TODO - return data Intent and finish
                setResult(RESULT_OK, data);

                finish();
            }
        });
    }

    // Use this method to set the default date and time

    private void setDefaultDateTime() {

        // Default is current time + 7 days
        mDate = new Date();
        mDate = new Date(mDate.getTime() + SEVEN_DAYS);

        Calendar c = Calendar.getInstance();
        c.setTime(mDate);

        setDateString(c.get(Calendar.YEAR), c.get(Calendar.MONTH),
                c.get(Calendar.DAY_OF_MONTH));

        dateView.setText(dateString);

        setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
                c.get(Calendar.MILLISECOND));

        timeView.setText(timeString);
    }

    private static void setDateString(int year, int monthOfYear, int dayOfMonth) {

        // Increment monthOfYear for Calendar/Date -> Time Format setting
        monthOfYear++;
        String mon = "" + monthOfYear;
        String day = "" + dayOfMonth;

        if (monthOfYear < 10)
            mon = "0" + monthOfYear;
        if (dayOfMonth < 10)
            day = "0" + dayOfMonth;

        dateString = year + "-" + mon + "-" + day;
    }

    private static void setTimeString(int hourOfDay, int minute, int mili) {
        String hour = "" + hourOfDay;
        String min = "" + minute;

        if (hourOfDay < 10)
            hour = "0" + hourOfDay;
        if (minute < 10)
            min = "0" + minute;

        timeString = hour + ":" + min + ":00";
    }

    private Priority getPriority() {

        switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
        case R.id.lowPriority: {
            return Priority.LOW;
        }
        case R.id.highPriority: {
            return Priority.HIGH;
        }
        default: {
            return Priority.MED;
        }
        }
    }

    private Status getStatus() {

        switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
        case R.id.statusDone: {
            return Status.DONE;
        }
        default: {
            return Status.NOTDONE;
        }
        }
    }

    // DialogFragment used to pick a ToDoItem deadline date

    public static class DatePickerFragment extends DialogFragment implements
            DatePickerDialog.OnDateSetListener {

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {

            // Use the current date as the default date in the picker

            final Calendar c = Calendar.getInstance();
            int year = c.get(Calendar.YEAR);
            int month = c.get(Calendar.MONTH);
            int day = c.get(Calendar.DAY_OF_MONTH);

            // Create a new instance of DatePickerDialog and return it
            return new DatePickerDialog(getActivity(), this, year, month, day);
        }

        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                int dayOfMonth) {
            setDateString(year, monthOfYear, dayOfMonth);

            dateView.setText(dateString);
        }

    }

    // DialogFragment used to pick a ToDoItem deadline time

    public static class TimePickerFragment extends DialogFragment implements
            TimePickerDialog.OnTimeSetListener {

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {

            // Use the current time as the default values for the picker
            final Calendar c = Calendar.getInstance();
            int hour = c.get(Calendar.HOUR_OF_DAY);
            int minute = c.get(Calendar.MINUTE);

            // Create a new instance of TimePickerDialog and return
            return new TimePickerDialog(getActivity(), this, hour, minute,
                    true);
        }

        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            setTimeString(hourOfDay, minute, 0);

            timeView.setText(timeString);
        }
    }

    private void showDatePickerDialog() {
        DialogFragment newFragment = new DatePickerFragment();
        newFragment.show(getFragmentManager(), "datePicker");
    }

    private void showTimePickerDialog() {
        DialogFragment newFragment = new TimePickerFragment();
        newFragment.show(getFragmentManager(), "timePicker");
    }

    private void log(String msg) {
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Log.i(TAG, msg);
    }

}

有什么想法吗？感谢您的帮助！

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Answer 1

此代码中代码中的问题

 mStatusRadioGroup.setId(R.id.statusDone); 
 mPriorityRadioGroup.setId(R.id.medPriority);

为什么setText（）会导致TextView重新打印在屏幕顶部？

1 个答案: