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  • 在我的片段类代码中，我已经实现了一切..但是在从 xml 膨胀它的同时，fiving inflateexceptiom ......

    • 片段类：

      package com.nyural.calendar;
import java.util.Calendar;
import java.util.Currency;
import java.util.Locale;

import com.nyurals.school.R;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.View.OnTouchListener;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ViewSwitcher;



public class CalendarWeeklyView extends Fragment {

    private GridView calendarGrid;
    private ViewSwitcher calendarSwitcher;

    private Calendar weekCalendar;
    private Locale locale;
    private CalendarAdapterWeekly calendarAdapterWeekly;
    private TextView currentWeek;
    private GestureDetector swipeDetector;
    private RelativeLayout calendarLayoutWeekly;

    public CalendarWeeklyView() {

        try {

            weekCalendar = Calendar.getInstance();
            locale = Locale.getDefault();
        } catch(Exception ex) {

        }

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        try {
            calendarLayoutWeekly  = (RelativeLayout) inflater.inflate(R.layout.calender_weekly,null);
            GridView calendarDayGridWeekly = (GridView) calendarLayoutWeekly.findViewById(R.id.calendar_days_grid_weekly);
            swipeDetector = new GestureDetector(getActivity(),new SwipeGesture(getActivity()));
            calendarGrid = (GridView) calendarLayoutWeekly.findViewById(R.id.calendar_grid_weekly);
            calendarSwitcher = (ViewSwitcher) calendarLayoutWeekly.findViewById(R.id.calendar_switcher_weekly);

            currentWeek = (TextView) calendarLayoutWeekly.findViewById(R.id.currentWeekDateWithMonth);

            calendarAdapterWeekly = new CalendarAdapterWeekly(getActivity());

            calendarGrid.setAdapter(calendarAdapterWeekly);

            updateCurrentWeek();
            calendarDayGridWeekly.setAdapter(new ArrayAdapter<String> (getActivity(),R.layout.calendar_item_week,getResources().getStringArray(R.array.weekly_days_array)));
            calendarGrid.setOnTouchListener(new OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event) {



                    return swipeDetector.onTouchEvent(event);
                }
            });
            //return calendarLayoutWeekly;
        } catch(Exception ex) {

        }
        return calendarLayoutWeekly;

    }

    private void updateCurrentWeek() {
        try {

            //calendarAdapterWeekly.refreshDays();
            currentWeek.setText(String.format(locale, "%tm" , weekCalendar) + "/" + weekCalendar.get(Calendar.DATE));
            currentWeek.append("-" + String.format(locale, "%tm", weekCalendar) + "/" + weekCalendar.get(Calendar.DATE + 7));
        } catch(Exception ex) {

        }

    }
    private void onPreviousWeek() {

        calendarSwitcher.setInAnimation(getActivity(), R.anim.in_from_left);
        calendarSwitcher.setOutAnimation(getActivity(), R.anim.out_to_right);
        calendarSwitcher.showPrevious();
        if (weekCalendar.get(Calendar.MONTH) == Calendar.JANUARY) {
            weekCalendar.set((weekCalendar.get(Calendar.YEAR) - 1), Calendar.DECEMBER, 1);
        } else {
            weekCalendar.set(Calendar.MONTH, weekCalendar.get(Calendar.MONTH)-1);
            //weekCalendar.set(Calendar.WEEK_OF_MONTH, weekCalendar.get(Calendar.WEEK_OF_MONTH) - 7);

        }
        updateCurrentWeek();



    }

    private void onNextWeek() {
        calendarSwitcher.setInAnimation(getActivity(),R.anim.in_from_right);
        calendarSwitcher.setOutAnimation(getActivity(),R.anim.out_to_left);
        calendarSwitcher.showNext();
        if(weekCalendar.get(Calendar.MONTH) == Calendar.DECEMBER){
            weekCalendar.set((weekCalendar.get(Calendar.YEAR) + 1),Calendar.JANUARY,1);
        } else {
            weekCalendar.set(Calendar.MONTH , weekCalendar.get(Calendar.MONTH) + 1);
            //weekCalendar.set(Calendar.WEEK_OF_MONTH, weekCalendar.get(Calendar.WEEK_OF_MONTH) + 7);

        }
        updateCurrentWeek();

    }

    private final class SwipeGesture extends SimpleOnGestureListener {

        private final int swipeMinDistance;
        private final int swipeThresholdVelocity;


        public SwipeGesture(Context context) {

            final ViewConfiguration viewConfig = ViewConfiguration.get(context);
            swipeMinDistance = viewConfig.getScaledTouchSlop();
            swipeThresholdVelocity = viewConfig.getScaledMinimumFlingVelocity();

        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY) {

            if(e1.getX() - e2.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity) {
                onNextWeek();
            } else if (e2.getX() - e1.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity) {
                onPreviousWeek();
            }
            return false;
        }



    }


}
      • 现在我在 actvity_timetable.xml 中使用这个类，

      <fragment
    android:id="@+id/fragmentForTimeTable"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    class="com.nyural.calendar.CalendarWeeklyView" />

    • 然后，我在我的主要活动中使用这个 xml，

      public class TimeTableActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle arg0) {
        setContentView(R.layout.activity_timetable);
        super.onCreate(arg0);
    }

}

  • 这里是 calendar_weekly

        <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <RelativeLayout
            android:id="@+id/calendar_header"
            android:layout_width="match_parent"
            android:layout_height="44dp"
            android:layout_alignParentTop="true"
            android:background="@android:color/white" >

            <TextView
                android:id="@+id/currentWeekDateWithMonth"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:gravity="center"
                android:text="01/01 - 01/08" />
        </RelativeLayout>

        <GridView
            android:id="@+id/calendar_days_grid_weekly"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/calendar_header"
            android:background="@android:color/holo_purple"
            android:horizontalSpacing="1dp"
            android:numColumns="8"
            android:stretchMode="columnWidth" />

        <ViewSwitcher
            android:id="@+id/calendar_switcher_weekly"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_below="@id/calendar_days_grid_weekly"
            android:background="@android:color/darker_gray" >

            <GridView
                android:id="@+id/calendar_grid_weekly"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:horizontalSpacing="1dp"
                android:numColumns="8"
                android:stretchMode="columnWidth"
                android:verticalSpacing="1dp" />
        </ViewSwitcher>

    </RelativeLayout>

这是堆栈跟踪...

09-26 08:04:32.820: E/AndroidRuntime(3038): FATAL EXCEPTION: main
09-26 08:04:32.820: E/AndroidRuntime(3038): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nyurals.school/com.nyurals.school.TimeTableActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.os.Looper.loop(Looper.java:137)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread.main(ActivityThread.java:5103)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at java.lang.reflect.Method.invokeNative(Native Method)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at java.lang.reflect.Method.invoke(Method.java:525)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at dalvik.system.NativeStart.main(Native Method)
09-26 08:04:32.820: E/AndroidRuntime(3038): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Activity.setContentView(Activity.java:1895)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at com.nyurals.school.TimeTableActivity.onCreate(TimeTableActivity.java:15)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Activity.performCreate(Activity.java:5133)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
09-26 08:04:32.820: E/AndroidRuntime(3038):     ... 11 more
09-26 08:04:32.820: E/AndroidRuntime(3038): Caused by: java.lang.ClassCastException: com.nyural.calendar.CalendarWeeklyView cannot be cast to android.app.Fragment
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Fragment.instantiate(Fragment.java:585)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Fragment.instantiate(Fragment.java:560)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.app.Activity.onCreateView(Activity.java:4738)
09-26 08:04:32.820: E/AndroidRuntime(3038):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
09-26 08:04:32.820: E/AndroidRuntime(3038):     ... 21 more

为什么它给出那个例外？？？？请尽快回复，因为我无法解决这个问题......

4

3 回答 3

0

尝试在片段类ViewGroup的方法中扩展布局时传递容器对象。onCreateView因此，在您的情况下，请尝试

calendarLayoutWeekly = (RelativeLayout) inflater.inflate(R.layout.calender_weekly,container);

编辑尝试交换setContentView()和super.onCreate()方法。因此您的代码将是

@Override
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
setContentView(R.layout.activity_timetable);
}

于 2013-09-26T12:37:59.937 回答
0 
java.lang.ClassCastException: com.nyural.calendar.CalendarWeeklyView cannot be cast to android.app.Fragment

你CalendarWeeklyView的是一个android.support.v4.app.Fragment，不是android.app.Fragment。如果您在 API 级别 11 或更高级别，只需更改导入。如果您处于较旧的 API 级别，则您的活动需要扩展支持库 android.support.v4.app.FragmentActivity。

无论哪种情况，您都不能混合支持库片段和 API 11+ 片段。

于 2013-09-26T12:41:09.050 回答
0

由于您的 calender_weekly xml 文件而显示此错误。在此处发布您的 xml 文件或检查您的 xml 文件，存在一些问题。

于 2013-09-26T12:16:30.357 回答