hi,all:
I write a listactivty,the item including a textview and a button，the data
came from a sqlite。but in handling the clickevent , i meet some problem, in
the CursorAdapter's bindView() function，i cann't get the current position。in
log，i find position of Cursor is the position I last click the item of
listview.
the code as follows:
package miaozl.hello;
import android.app.ListActivity;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
public class helloActivity extends ListActivity{
private helloAdapter mDbHelper;
private final static String TAG ="helloActivity";
private static LayoutInflater mFactory;
ListView lv;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDbHelper = new helloAdapter(this);
mDbHelper.open();
mFactory = LayoutInflater.from(this);
lv= getListView();
lv.setChoiceMode(1);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int
arg2,
long arg3) {
// TODO Auto-generated method stub
Log.d(TAG,"====onItemClick===arg3 is ==="+arg3);
}
});
fillData();
}
private void fillData() {
// TODO Auto-generated method stub
Cursor c = mDbHelper.fetchAllNotes();
startManagingCursor(c);
String[] from = new String[] {
helloAdapter.KEY_WORD,helloAdapter.KEY_ID};
int[] to = new int[] { R.id.word,R.id.button};
lv.setAdapter(new ListAdapter(this, c));
}
private static class ListAdapter extends CursorAdapter {
public ListAdapter(Context context, Cursor c) {
super(context, c);
// TODO Auto-generated constructor stub
}
@Override
public void bindView(View view, Context context, final Cursor
cursor) {
// TODO Auto-generated method stub
Button onButton=(Button)view.findViewById(R.id.button);
onButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Log.d(TAG,
"=cursor.getPosition()="+cursor.getPosition());
}
});
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup
parent) {
// TODO Auto-generated method stub
View ret= mFactory.inflate(R.layout.list_item,parent,false);
TextView word=(TextView)ret.findViewById(R.id.word);
Button onButton=(Button)ret.findViewById(R.id.button);
onButton.setFocusable(false);
word.setText(cursor.getString(cursor.getColumnIndex(helloAdapter.KEY_WORD)));
onButton.setBackgroundResource(R.drawable.icon);
return ret;
}
}
}
the ListAdapter as fallows:
package miaozl.hello;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class helloAdapter{
public static final String KEY_WORD = "word";
public static final String KEY_ID = "_id";
private static final String TAG = "helloAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_CREATE =
"create table notes (_id integer primary key autoincrement, "
+ "word text not null);";
private static final String DATABASE_NAME = "list";
private static final String DATABASE_TABLE = "notes";
private static final int DATABASE_VERSION = 1;
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int
newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + "
to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS notes");
onCreate(db);
}
}
/**
* Constructor - takes the context to allow the database to be
* opened/created
*
* @param ctx the Context within which to work
*/
public helloAdapter(Context ctx) {
this.mCtx = ctx;
}
/**
* Open the notes database. If it cannot be opened, try to create a new
* instance of the database. If it cannot be created, throw an exception
to
* signal the failure
*
* @return this (self reference, allowing this to be chained in an
* initialization call)
* @throws SQLException if the database could be neither opened or
created
*/
public helloAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
/**
* Create a new note using the title and body provided. If the note is
* successfully created return the new rowId for that note, otherwise
return
* a -1 to indicate failure.
*
* @param title the title of the note
* @param body the body of the note
* @return rowId or -1 if failed
*/
public long createNote(String word) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_WORD, word);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
/**
* Delete the note with the given rowId
*
* @param rowId id of note to delete
* @return true if deleted, false otherwise
*/
public boolean deleteNote(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ID + "=" + rowId, null) > 0;
}
/**
* Return a Cursor over the list of all notes in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ID, KEY_WORD
}, null, null, null, null, null);
}
/**
* Return a Cursor positioned at the note that matches the given rowId
*
* @param rowId id of note to retrieve
* @return Cursor positioned to matching note, if found
* @throws SQLException if note could not be found/retrieved
*/
public Cursor fetchNote(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ID,
KEY_WORD}, KEY_ID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
/**
* Update the note using the details provided. The note to be updated is
* specified using the rowId, and it is altered to use the title and
body
* values passed in
*
* @param rowId id of note to update
* @param title value to set note title to
* @param body value to set note body to
* @return true if the note was successfully updated, false otherwise
*/
public boolean updateNote(long rowId,String word) {
ContentValues args = new ContentValues();
args.put(KEY_WORD, word);
return mDb.update(DATABASE_TABLE, args, KEY_ID + "=" + rowId, null)
> 0;
}
}
list_item.xml as follows:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android";
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:id="@+id/word"
android:layout_width="250dip"
android:layout_height="wrap_content"/>
<Button android:id ="@+id/button"
android:layout_width ="50dip"
android:layout_height ="wrap_content"/>
</LinearLayout>
pls help me 。
/*******************************************/
苗忠良(Miao Zhong-liang)
MSN:[email protected] <msn%[email protected]>
BLOG:http://miaozl.spaces.live.com
/*******************************************/
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