数组越界！！求！java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0

SQTTTTTTT 2015-05-03 11:37:09
报错：


05-03 23:23:39.106: E/AndroidRuntime(992): FATAL EXCEPTION: main

05-03 23:23:39.106: E/AndroidRuntime(992): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0

05-03 23:23:39.106: E/AndroidRuntime(992): 	at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at java.util.ArrayList.get(ArrayList.java:311)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at com.example.snote1.MainActivity$MyAdapter$6.onClick(MainActivity.java:236)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:159)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at android.os.Handler.dispatchMessage(Handler.java:99)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at android.os.Looper.loop(Looper.java:123)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at android.app.ActivityThread.main(ActivityThread.java:3683)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at java.lang.reflect.Method.invokeNative(Native Method)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at java.lang.reflect.Method.invoke(Method.java:507)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)

05-03 23:23:39.106: E/AndroidRuntime(992): 	at dalvik.system.NativeStart.main(Native Method)


出现数组越界，但是一直找不到哪里越界了。使用了ArrayList，把数据放在ArrayList中，然后通过MyAdapter放在页面中，在删除的过程中，String deleteItemId=(String)mData.get(Position).get("id");notesDao.deleteItem(Integer.parseInt(deleteItemId));，想要通过Position获取到我需要删除的数据的那一行的id值，但是一直获取的过来的Position所在位置的下一行的id值。具体可以看看
showMoveDialog（）和getData（）。谢谢！

代码如下！
package com.example.snote1;



import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;



import android.R.integer;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.ListActivity;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.database.Cursor;

import android.os.Bundle;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.View;

import android.view.ViewGroup;

import android.view.Window;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageButton;

import android.widget.LinearLayout;

import android.widget.TextView;

import com.example.sqlite3.NotesDao;



public class MainActivity extends ListActivity{

	private static final String TAG="example";

	private List<Map<String, Object>> mData;

	public ImageButton addButton;

	public ImageButton searchButton;

	private int oldposition=-1;

	private Cursor cursor;

	NotesDao notesDao;

	

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

		setContentView(R.layout.activity_main);

		getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar);

		addButton=(ImageButton)findViewById(R.id.addbutton);

		searchButton=(ImageButton)findViewById(R.id.searchbutton);

		addButton.setOnClickListener(new View.OnClickListener(){

			@Override

			public void onClick(View v) {

				// TODO Auto-generated method stub

				Intent intent=new Intent(MainActivity.this,NoteEditActivity.class);

				startActivity(intent);

			}

		});

		mData=getData();

		setListAdapter(new MyAdapter(MainActivity.this));

	}

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}

	 List<Map<String,Object>> getData() {

		// TODO Auto-generated method stub

		List<Map<String,Object>> list = new ArrayList<Map<String, Object>>();

		

		notesDao=new NotesDao(this);

		notesDao.open();

		cursor=notesDao.getNotes();

		list.clear();

		int curnum=cursor.getCount();

			if (curnum>0&&cursor!=null) {

				cursor.moveToFirst();

				for (int i = 0; i < curnum; i++) {

					Map<String, Object> map=new HashMap<String, Object>();

					map.put("id", cursor.getString(0));

					map.put("title", cursor.getString(1));

					map.put("content", cursor.getString(2));

					map.put("time", cursor.getString(3));

					map.put("bmi", cursor.getString(4));

					list.add(map);

					cursor.moveToNext();

			}

		}

		

		cursor.close();

		notesDao.close();

		return list;	

	}

	public final class ViewHolder {

		public TextView title;

		public TextView content;

		public TextView time;

		public ImageButton moreButton;

		public LinearLayout myLayout;

		public Button openButton;

		public Button editButton;

		public Button deleteButton;

		public Button renameButton;

		

	}

	public class MyAdapter extends BaseAdapter {

		private LayoutInflater mInflater;

		public MyAdapter(Context context) {

			this.mInflater = LayoutInflater.from(context);

		}



		@Override

		public int getCount() {

			// TODO Auto-generated method stub

			return mData.size();

		}



		@Override

		public Object getItem(int position) {

			// TODO Auto-generated method stub

			return mData.get(position);

		}



		@Override

		public long getItemId(int position) {

			// TODO Auto-generated method stub

			return position;

		}



		@Override

		public View getView(final int position, View convertView,

				ViewGroup parent) {

			// TODO Auto-generated method stub

			

			ViewHolder holder = null;

			if (convertView == null) {

				holder = new ViewHolder();

				convertView = mInflater.inflate(R.layout.vlist, null);

				Log.d(TAG, "positon   " + position + "converView is null,new "+ convertView);

				holder.title = (TextView) convertView.findViewById(R.id.title);

				holder.content = (TextView) convertView.findViewById(R.id.content);

				holder.time = (TextView) convertView.findViewById(R.id.time);

				holder.moreButton = (ImageButton) convertView.findViewById(R.id.moreButton);

				holder.myLayout = (LinearLayout) convertView.findViewById(R.id.mylayout);

				holder.openButton=(Button)convertView.findViewById(R.id.openbtn);

				holder.deleteButton=(Button)convertView.findViewById(R.id.deletebtn);

				holder.editButton=(Button)convertView.findViewById(R.id.editbtn);

				holder.renameButton=(Button)convertView.findViewById(R.id.renamebtn);			

				convertView.setTag(holder);



			} else {

				holder = (ViewHolder) convertView.getTag();

				Log.d(TAG, "positon:" + position + "converView is not null,"

						+ convertView);

			}

			holder.title.setText((String) mData.get(position).get("id"));

			holder.content.setText((String) mData.get(position).get("title"));

			holder.time.setText((String) mData.get(position).get("time"));

			

			holder.moreButton.setOnClickListener(new Button.OnClickListener() {

				@Override

				public void onClick(View v) {

					// TODO Auto-generated method stub

					MyAdapter.this.getMoreMenu(position);

					Log.d(TAG, "moreBtn clicked() " + position + " is clicked");

				}

			});

			if (position==oldposition) {

				holder.myLayout.setVisibility(View.VISIBLE);

			}else {

				holder.myLayout.setVisibility(View.GONE);

			}

			Log.d(TAG, "position:"+position);

			

			final int currentPosition=position;

			holder.openButton.setOnClickListener(new Button.OnClickListener() {

				

				@Override

				public void onClick(View v) {

					// TODO Auto-generated method stub

					Intent intent=new Intent(MainActivity.this,NoteLookActivity.class);

					

					//String num=String.valueOf(position);

					intent.putExtra("result",currentPosition);

					//setResult(Activity.RESULT_OK, resultIntent);

					startActivity(intent);

				}

			});

			holder.editButton.setOnClickListener(new Button.OnClickListener() {

							

				@Override

				public void onClick(View v) {

					// TODO Auto-generated method stub

								

				}

			});

			holder.renameButton.setOnClickListener(new Button.OnClickListener() {

				

				@Override

				public void onClick(View v) {

					// TODO Auto-generated method stub

					

				}

			});

			holder.deleteButton.setOnClickListener(new Button.OnClickListener() {

				

				@Override

				public void onClick(View v) {

					// TODO Auto-generated method stub

					showMoveDialog(currentPosition);

					

					

					//mData.remove(position);

					//notifyDataSetChanged();

				}

			});

			return convertView;

		}

		private void getMoreMenu(int position) {

			// TODO Auto-generated method stub

			if (position!=oldposition) {

				oldposition=position;

			}else {

				oldposition=-1;

			}

			 notifyDataSetChanged();

		}

		private void showMoveDialog(final int currentPosition){

			new AlertDialog.Builder(MainActivity.this).setTitle("提示").setMessage("确定要删除吗？")  

			 .setPositiveButton("确定", new DialogInterface.OnClickListener() {  

	            @Override  

	           public void onClick(DialogInterface dialog, int which) {  

	            	int newposition=currentPosition-1;

	                mData.remove(currentPosition);

	                //cursor.moveToPosition(currentPosition);

	                Log.d(TAG, "currentPosition  "+currentPosition);

	                Log.d(TAG, "listsize  "+getData().size());

	                Log.d(TAG, "deleteItem  "+(String)mData.get(currentPosition).get("id"));

	                 String deleteItemId=(String)mData.get(currentPosition).get("id");

	                

	                notesDao.open();

	                notesDao.deleteItem(Integer.parseInt(deleteItemId));

	                

	                notifyDataSetChanged();

	            }  

	        }).show(); 

		}

	}

	

}




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SQTTTTTTT 2015-05-04
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已经解决。 原来的错误代码。 
 mData.remove(currentPosition);
                    //cursor.moveToPosition(currentPosition);
                    Log.d(TAG, "currentPosition  "+currentPosition);
                    Log.d(TAG, "listsize  "+getData().size());
                    Log.d(TAG, "deleteItem  "+(String)mData.get(currentPosition).get("id"));
                     String deleteItemId=(String)mData.get(currentPosition).get("id");
                     
                    notesDao.open();
                    notesDao.deleteItem(Integer.parseInt(deleteItemId));
在mData.remove(currentPosition)，把那一行已经remove了。所在下面获取id时出现数组越界。应该先对数据库操作，获取当前位置的position，删除对应的id，然后再对arraylist操作，进行remove。 正确代码 把这句代码mData.remove(currentPosition);放到数据操作之后。 
 
                    //cursor.moveToPosition(currentPosition);
                    Log.d(TAG, "currentPosition  "+currentPosition);
                    Log.d(TAG, "listsize  "+getData().size());
                    Log.d(TAG, "deleteItem  "+(String)mData.get(currentPosition).get("id"));
                     String deleteItemId=(String)mData.get(currentPosition).get("id");
                     
                    notesDao.open();
                    notesDao.deleteItem(Integer.parseInt(deleteItemId));
                     mData.remove(currentPosition);
答题小助手 2015-05-04
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你吧mdata强转成字符串了。。。。。当然没有index0的。。。。。你应该加个括号吧
Hare_ 2015-05-04
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at com.example.snote1.MainActivity$MyAdapter$6.onClick(MainActivity.java:236) String deleteItemId=(String)mData.get(currentPosition).get("id"); 236行对应的就是你这一行,mData中没有数据,size为0,
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