0

I am still having a problem with just adding a button to the screen and getting it to execute my code. Right now, I will be happy with select the button and getting the "log,d (msg);" to work. The problem may be due to all my code in the fragment and/or combination of buttons and a list that I scroll on the same screen. It is probably a very basic problem.

My application first starts with a scrolling list created by a cursor from SQLite table. So it is an open ended list. Select an item and I get a detail screen to allow add, update or delete. That all works.

Now I am adding 3 buttons above the list.

I am a newbie, and the book I started with said to create a fragment, so the screen with the list is coded that way. (The detail screen is rewritten to just the activity.)

I have tried lots of things, but roughly three ways below:

In my onCreate method:

"btn_Add.setOnClickListener(new View.OnClickListener()"

As suggested in a recent - reply - This executes fragment onCreate , then crashes with these messages:

java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.dummies.android.taskreminder/com.dummies.android.
taskreminder. EventListActivity}:Binary XML file line #34: Error inflating class fragment

As a separate method after the onCreate:

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

This causes a loop - repeating the onCreate several times then crashes with this:

java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.dummies.android.taskreminder/com.dummies.android.
taskreminder.EventListActivity}: android.view.InflateException: 
Binary XML file line #8: Error inflating class <unknown>

3 I added this to the XML file in button definition:

android:onClick="MyButton"

and

public void MyButton(View v)
    {
     Log.d(". . . " + v);
    }

This allowed the application to load, but when I selected the button, it crashed when I selected the button with the following message:

java.lang.IllegalStateException: Could not find a method MyButton(View) in the activity

This is pieces from the fragment: eventListFragment.java

public class EventListFragment extends ListFragment
                                  implements LoaderCallbacks<Cursor>
  {
   . . . .
    List strRecord = new ArrayList(3);

    @Override
    public void onCreate(Bundle savedInstanceState)
       {
        super.onCreate(savedInstanceState);
        . . . .
        setListAdapter(mAdapter);
        getLoaderManager().initLoader(0, null, this);
       )
//------------------------------------
// THIS IS EXAMPLE # 1
//     java.lang.RuntimeException: Unable to start activity
//     ComponentInfo{com.dummies.android.taskreminder/com.dummies.android.taskreminder.EventListActivity}:
//     android.view.InflateException: Binary XML file line #34: Error inflating class fragment

    btn_Add.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
        // you may want to perform your clicks here.
        Log.d("EventLst","S create view btnAddEvent:" + v);
        }
    });   
//-------------------------------------


  }   //----> END: public void onCreate  

//-------------------------------------
//     THIS IS EXAMPLE #2:
//  it give me this error on initial load:
//  java.lang.RuntimeException: Unable to start activity
//  ComponentInfo{com.dummies.android.taskreminder/com.dummies.android.taskreminder.EventListActivity}:
//  android.view.InflateException: Binary XML file line #8: Error inflating class <unknown>

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
       {
        View view = inflater.inflate(R.layout.event_list, container, false);
        Button button = (Button) view.findViewById(R.id.btn_Add);
        button.setOnClickListener(new OnClickListener()
           {
            @Override
            public void onClick(View v)
               {
                Activity activity = getActivity();
                if (activity != null)
                   {
                    Log.d("EventLst","S create view btnAddEvent:" + v);
                    Toast.makeText(activity, "GOT button", Toast.LENGTH_LONG).show();
                   }
               }
             }   );
        return view;
       }
//---------------------------------------


    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor)
       {
        . . . 
         while  (cursor.isAfterLast() == false)
            {
             strRecord.add(iRecNo, strDate + ": "  + strC[2]);
            }
         lstAdapter = new ArrayAdapter<String>(getActivity(),
                  R.layout.event_row, R.id.text1, strRecord);
          setListAdapter(lstAdapter);

This is the main layout: event_list.XML Note: android:onClick="MyButton" only in try #3 above

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:name="com.dummies.android.taskreminder.EventListFragment" >

 <Button  android:id="@+id/btn_Add"
    android:onClick="MyButton"
    android:layout_width="50dp"
    android:layout_height="30dp"   
    android:textSize="12dp"
    android:padding="1dip"
    android:text="@string/add" />

  <Button  android:id="@+id/btn_Exit"
    android:onClick="onClick"
    android:layout_width="50dp"
    android:layout_height="30dp"
    android:textSize="12dp"
    android:padding="1dip"
    android:layout_marginLeft="5dp"
    android:layout_toRightOf="@+id/btn_Add" 
    android:text="@string/exit" />

  <Button  android:id="@+id/btn_Other"
    android:layout_width="50dp"
    android:layout_height="30dp"
    android:textSize="12dp"
    android:padding="1dip"
    android:layout_marginLeft="5dp"
    android:layout_toRightOf="@+id/btn_Exit" 
    android:text="@string/other" />

 <fragment
    android:name="com.dummies.android.taskreminder.EventListFragment"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/btn_Add"  />
 </RelativeLayout>   

This is the row to create the scrow list: event_row.XML

  <TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/text1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:textSize="12dp"
    android:padding="2dip" />

Luksprog requested this information in his reply please post or at least make available to him/her.

First I created this XML file, event_list_activity.xml, guessed a little on the filename:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container" 
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

Also added to strings:

<string name="container">EventContainer</string>

Ran my test and this is the complete log: (First three records from my code):

04-28 16:09:24.504: D/EventLst(258): X onCrt: x01strI:eventname
04-28 16:09:24.544: D/EventLst(258): X onCrt: x02 START
04-28 16:09:24.584: D/EventLst(258): X onCrt: x03 START
04-28 16:09:24.624: D/AndroidRuntime(258): Shutting down VM
04-28 16:09:24.646: W/dalvikvm(258): threadid=3: thread exiting with uncaught exception (group=0x4001b1d8)
04-28 16:09:24.646: E/AndroidRuntime(258): Uncaught handler: thread main exiting due to uncaught exception
04-28 16:09:24.646: W/dalvikvm(258): threadid=3: thread exiting with uncaught exception (group=0x4001b1d8)
04-28 16:09:24.646: E/AndroidRuntime(258): Uncaught handler: thread main exiting due to uncaught exception
04-28 16:09:25.065: E/AndroidRuntime(258): java.lang.RuntimeException: Unable to start activity
         ComponentInfo{com.dummies.android.taskreminder/com.dummies.android.taskreminder.EventListActivity}:
         android.view.InflateException: Binary XML file line #33: Error inflating class fragment
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.os.Looper.loop(Looper.java:123)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.app.ActivityThread.main(ActivityThread.java:4363)
04-28 16:09:25.065: E/AndroidRuntime(258):  at java.lang.reflect.Method.invokeNative(Native Method)
04-28 16:09:25.065: E/AndroidRuntime(258):  at java.lang.reflect.Method.invoke(Method.java:521)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-28 16:09:25.065: E/AndroidRuntime(258):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-28 16:09:25.065: E/AndroidRuntime(258):  at dalvik.system.NativeStart.main(Native Method)
04-28 16:09:25.065: E/AndroidRuntime(258): Caused by: android.view.InflateException: Binary XML file line #33:
         Error inflating class fragment
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:582)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         com.android.internal.policy.impl.WimmWindow.setContentView(WimmWindow.java:181)
04-28 16:09:25.065: E/AndroidRuntime(258):  at android.app.Activity.setContentView(Activity.java:1622)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         com.dummies.android.taskreminder.EventListActivity.onCreate(EventListActivity.java:22)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
04-28 16:09:25.065: E/AndroidRuntime(258):  ... 11 more
04-28 16:09:25.065: E/AndroidRuntime(258): Caused by: java.lang.NullPointerException
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         com.dummies.android.taskreminder.EventListFragment.onCreate(EventListFragment.java:98)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.support.v4.app.Fragment.performCreate(Fragment.java:1437)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:877)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1066)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1168)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:280)
04-28 16:09:25.065: E/AndroidRuntime(258):  at
         android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:558)

Next I added your statements below and get errors below is from the start of the fragment to the end of on create Note: I also had to add: import android.support.v4.app.FragmentTransaction;

package com.dummies.android.taskreminder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;  
import java.util.Date;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.content.DialogInterface;
import android.os.Bundle; 
import android.support.v4.app.FragmentTransaction;
//* below insures that you are using the ...v4 for version android 1.6
import android.support.v4.app.ListFragment; 
import android.support.v4.app.LoaderManager.LoaderCallbacks; 
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.MenuItem;
import android.content.ContentValues;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Button;
import android.widget.Toast;
import android.util.Log;

public class EventListFragment extends ListFragment
                                  implements 
                                  LoaderCallbacks<Cursor>
  {
    private SimpleCursorAdapter mAdapter;
    List strRecId = new ArrayList();

    private ListAdapter lstAdapter;
    private Button btn_Add;
    private Button myButton;

    List strRecord = new ArrayList(3);
    List strFields = new ArrayList();

    @Override
    public void onCreate(Bundle savedInstanceState)
       {
        super.onCreate(savedInstanceState);

//---------------------------------------------------------------        
     // assuming you use FragmentActivity
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.add(R.id.container, new EvetListFragment());
        ft.commit();        

// errors above:   
// For: getSupportFragmentManager()
//  "The method getSupportFragmentManager() is undefined for the type EventListFragment" 
// For: EvetListFragment());
//   "EvetListFragment cannot be resolved to a type"
//----------------------------------------------------------------

//  BELOW READS FROM DATABASE AND DISPLAYS EVENTNAME
//  THEN ALLOWS UPDATE OF THEM ABD INSERT FROM EXISTING        
//        Log.d("EventLst","X onCrt: x01 START" ); 

        String[]  strItems =  new String[]  
           { 
            EventProvider.COLUMN_EVENTNAME
           };
        Log.d("EventLst","X onCrt: x01strI:" + strItems[0]);          
        int[] iCnt = new int[]
            {  
             R.id.text1
            };

        mAdapter =  new SimpleCursorAdapter(getActivity(),R.layout.event_row,
                    null, strItems, iCnt,  0);
        Log.d("EventLst","X onCrt: x02 START" );

        setListAdapter(mAdapter);
        getLoaderManager().initLoader(0, null, this);

        Log.d("EventLst","X onCrt: x03 START" );
//---------------------------------------------------------------------------------
// I thought this set my OnClickListener.  Without this code, the application runs 
//   but the buttons don't do anything  
        btn_Add.setOnClickListener(new OnClickListener()
         {
      @Override
          public void onClick(View v)
             {
              Log.d("EventLst","S onclkBtn2" + v);
             }
         }  );
//-------------------------------------------------------------------------------

      }   //----> END: public void onCreate    

Many thanks for your help.

4

1 回答 1

0

你的代码有很多问题:

请发布完整的堆栈跟踪,InflateException告诉您片段无法膨胀的原因。最可能的原因是您扩展 aListFragment并覆盖onCreateView()以膨胀您自己的布局,该布局不包含ListView带有 id的 a android.R.id.list@android:id/list在 xml 文件中)。即使没有抛出该异常,您的代码仍然会失败,因为您将陷入 stackoverflow 错误,您的片段布局是一个包含相同片段的布局文件(将再次加载等等......)。

消除:

android:name="com.dummies.android.taskreminder.EventListFragment"

从布局。布局应该是这样的:

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

 <Button  android:id="@+id/btn_Add"    
    android:layout_width="50dp" <!-- you should avoid fixed sizes -->
    android:layout_height="30dp"   
    android:textSize="12sp" <!-- use sp units for text size! -->
    android:padding="1dip"
    android:text="@string/add" />

  <Button  android:id="@+id/btn_Exit"
    android:layout_width="50dp"
    android:layout_height="30dp"
    android:textSize="12sp"
    android:padding="1dip"
    android:layout_marginLeft="5dp"
    android:layout_toRightOf="@id/btn_Add" 
    android:text="@string/exit" />

  <Button  android:id="@+id/btn_Other"
    android:layout_width="50dp"
    android:layout_height="30dp"
    android:textSize="12sp"
    android:padding="1dip"
    android:layout_marginLeft="5dp"
    android:layout_toRightOf="@id/btn_Exit" 
    android:text="@string/other" />

 <ListView
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/btn_Add"  />
 </RelativeLayout>   

这将是片段的布局。的布局Activity将是:

<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container" 
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

添加片段(在onCreate()方法中):

// assuming you use FragmentActivity
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.container, new EvetListFragment());
ft.commit();

然后,您可以EventListFragment使用R.id.container.

在您的EventListFragment设置中OnClickListener,您的按钮以及onActivityCreated()回调中的适配器。该onClick属性将在该级别查找该方法,Activity因此只需OnClickListener手动设置。

于 2013-04-24T08:48:37.913 回答