删除Android中的ListiView和SQLite行
我正在Android Studio中使用这个库开发一个应用程序：com.daimajia.swipelayout:library:1.2。0@aar. 我的应用程序用户使用具有以下类的SQLite数据库： BDSQLiteHelper.java删除Android中的ListiView和SQLite行,android,sqlite,listview,adapter,Android,Sqlite,Listview,Adapter,我正在Android Studio中使用这个库开发一个应用程序：com.daimajia.swipelayout:library:1.2。0@aar. 我的应用程序用户使用具有以下类的SQLite数据库： BDSQLiteHelper.java public class BDSQLiteHelper extends SQLiteOpenHelper { private static final int DATABASE_VERSION = 1; private static f
public class BDSQLiteHelper extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "ExtraOficial";
private static final String TABELA_VAZAMENTOS = "VazamentosToSQL";
private static final String vazID = "VazID";
private static final String nomeServico = "nomeServico";
private static final String[] VAZ_COLUNAS = {vazID, nomeServico};
public BDSQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_VAZAMENTOTABLE = "CREATE TABLE VazamentosToSQL ("+
"vazID INTEGER PRIMARY KEY AUTOINCREMENT,"+
"nomeServico)";
db.execSQL(CREATE_VAZAMENTOTABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS VazamentosToSQL");
this.onCreate(db);
}
public void addVazamentos(VazamentosToSQL VazamentosToSQL) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(nomeServico, VazamentosToSQL.getNomeServico());
db.insert(TABELA_VAZAMENTOS, null, values);
db.close();
}
public VazamentosToSQL getVazamentos (int vazID) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABELA_VAZAMENTOS,
VAZ_COLUNAS,
" vazID = ?",
new String[] {String.valueOf(vazID)},
null,
null,
null,
null);
if (cursor == null) {
return null;
} else {
cursor.moveToFirst();
VazamentosToSQL VazamentosToSQL = cursorTovazamentos(cursor);
return VazamentosToSQL;
}
}
private VazamentosToSQL cursorTovazamentos(Cursor cursor) {
VazamentosToSQL VazamentosToSQL = new VazamentosToSQL();
VazamentosToSQL.setVazID(Integer.parseInt(cursor.getString(0)));
VazamentosToSQL.setNomeServico(cursor.getString(1));
return VazamentosToSQL;
}
public ArrayList<VazamentosToSQL> getAllVazamentos() {
ArrayList<VazamentosToSQL> listaVazamentos = new ArrayList<VazamentosToSQL>();
String query = "SELECT * FROM " + TABELA_VAZAMENTOS + " ORDER BY "+ vazID + " DESC";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(query, null);
if (cursor.moveToFirst()) {
do {
VazamentosToSQL VazamentosToSQL = cursorTovazamentos(cursor);
listaVazamentos.add(VazamentosToSQL);
} while (cursor.moveToNext());
}
return listaVazamentos;
}
[...]
public int deleteVazamentos(VazamentosToSQL VazamentosToSQL) {
SQLiteDatabase db = this.getWritableDatabase();
int i = db.delete(TABELA_VAZAMENTOS,
vazID+" =?",
new String[] { String.valueOf(VazamentosToSQL.getVazID())});
db.close();
return i;
}
[...]
//variables
private BDSQLiteHelper bd;
ArrayList<VazamentosToSQL> listaVazamentos;
SwipeLayout swipeLayout;
private final static String TAG = ListViewActivity.class.getSimpleName();
vazamentosAdapter adapter;
ListView lista;
[...]
@Override
protected void onCreate(Bundle savedInstanceState)
{super.onCreate(savedInstanceState);
[...]
bd = new BDSQLiteHelper(this);
lista = (ListView) findViewById(R.id.lvdenuncias);
listaVazamentos = bd.getAllVazamentos();
setListViewHeader();
setListViewAdapter();
lista.setOnItemClickListener(new AdapterView.OnItemClickListener() { //aqui é o vazamentosAdapter
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(ExibeVazamentosActivity.this, DetalhesVazamentosActivity.class);
intent.putExtra("vazID", listaVazamentos.get(position).getVazID());
startActivity(intent);
}
});
@Override
protected void onStart() {
super.onStart();
updateAdapter(); //Refresh ListView items
}
private void setListViewHeader() {
LayoutInflater inflater = getLayoutInflater();
View header = inflater.inflate(R.layout.header_listview, lista, false);
totalClassmates = (TextView) header.findViewById(R.id.total);
swipeLayout = (SwipeLayout)header.findViewById(R.id.swipe_layout);
setSwipeViewFeatures();
//UNNECESSARY for me: lista.addHeaderView(header);
}
private void setSwipeViewFeatures() {
swipeLayout.setShowMode(SwipeLayout.ShowMode.PullOut);
//add drag edge.(If the BottomView has 'layout_gravity' attribute, this line is unnecessary)
swipeLayout.addDrag(SwipeLayout.DragEdge.Left, findViewById(R.id.bottom_wrapper));
swipeLayout.addSwipeListener(new SwipeLayout.SwipeListener() {
@Override
public void onClose(SwipeLayout layout) {
Log.i(TAG, "onClose");
}
@Override
public void onUpdate(SwipeLayout layout, int leftOffset, int topOffset) {
Log.i(TAG, "on swiping");
}
@Override
public void onStartOpen(SwipeLayout layout) {
Log.i(TAG, "on start open");
}
@Override
public void onOpen(SwipeLayout layout) {
Log.i(TAG, "the BottomView totally show");
}
@Override
public void onStartClose(SwipeLayout layout) {
Log.i(TAG, "the BottomView totally close");
}
@Override
public void onHandRelease(SwipeLayout layout, float xvel, float yvel) {
//when user's hand released.
}
});
}
private void setListViewAdapter() {
adapter = new vazamentosAdapter(this, listaVazamentos);
lista.setAdapter(adapter);
}
public void updateAdapter() {
listaVazamentos.clear();
listaVazamentos.addAll(bd.getAllVazamentos());
adapter.notifyDataSetChanged(); //update adapter
lista.invalidateViews();
lista.refreshDrawableState();
}
}
[…]
//变数
私人BDSqliteBD；
ArrayList listaVazamentos；
泳道布置泳道布置；
私有最终静态字符串标记=ListViewActivity.class.getSimpleName（）；
vazamentosAdapter适配器；
ListView lista；
[...]
@凌驾
创建时受保护的void（Bundle savedInstanceState）
{super.onCreate（savedInstanceState）；
[...]
bd=新的BDSQLiteHelper（此）；
lista=（ListView）findViewById（R.id.lvdenuncias）；
listaVazamentos=bd.getAllVazamentos（）；
setListViewHeader（）；
setListViewAdapter（）；
lista.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{//aquiéo vazamentosAdapter
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
意向意向=新意向（ExibeVazamentosActivity.this，DetalhesVazamentosActivity.class）；
intent.putExtra（“vazID”，listaVazamentos.get（position.getVazID（））；
星触觉（意向）；
}
});
@凌驾
受保护的void onStart（）{
super.onStart（）；
updateAdapter（）；//刷新列表视图项
}
私有void setListViewHeader（）{
LayoutInflater充气机=getLayoutInflater（）；
视图标题=充气机。充气（R.layout.header\u listview，lista，false）；
TotalAsyments=（TextView）header.findViewById（R.id.total）；
swipeLayout=（swipeLayout）header.findViewById（R.id.swipe_布局）；
设置WipeViewFeatures（）；
//我不需要：lista.addHeaderView（header）；
}
私有void setswipviewfeatures（）{
swipeLayout.setShowMode（swipeLayout.ShowMode.PullOut）；
//添加拖动边。（如果底部视图具有“布局\重力”属性，则不需要此行）
addDrag（swipeLayout.DragEdge.Left，findViewById（R.id.bottom_包装器））；
swipeLayout.addSwipeListener（新的swipeLayout.SwipeListener（）{
@凌驾
公共空间闭合（SwipeLayout布局）{
Log.i（标记“onClose”）；
}
@凌驾
公共空间更新（SwipeLayout布局、int leftOffset、int topOffset）{
Log.i（标记“刷卡时”）；
}
@凌驾
开始开放时的公共空间（SwipeLayout布局）{
Log.i（标签“启动时打开”）；
}
@凌驾
公共空间开放（SwipeLayout布局）{
Log.i（标记“底部视图完全显示”）；
}
@凌驾
公共空间开始关闭（SwipeLayout布局）{
Log.i（标记“底部视图完全关闭”）；
}
@凌驾
手动释放上的公共空隙（旋转布局、浮动xvel、浮动yvel）{
//当用户的手松开时。
}
});
}
私有void setListViewAdapter（）{
适配器=新的vazamentosAdapter（此为listaVazamentos）；
setAdapter（适配器）；
}
public void updatedapter（）{
listaVazamentos.clear（）；
addAll（bd.getAllVazamentos（））；
adapter.notifyDataSetChanged（）；//更新适配器
lista.invalidateViews（）；
lista.refreshDrawableState（）；
}
}
public class vazamentosAdapter extends ArrayAdapter<VazamentosToSQL> {
private final Context context;
private final ArrayList<VazamentosToSQL> elementos;
File imgFile;
private Bitmap bitmap;
private ExifInterface exifObject;
private ExibeVazamentosActivity activity;
int vazID;
private SQLiteDatabase bd;
public vazamentosAdapter(Context context, ArrayList<VazamentosToSQL> elementos) {
super(context, R.layout.linha, elementos);
this.context = context;
this.elementos = elementos;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
// inflate UI from XML file
convertView = inflater.inflate(R.layout.linha, parent, false);
// get all UI view
holder = new ViewHolder(convertView);
// set tag for holder
convertView.setTag(holder);
}else {
// if holder created, get tag from view
holder = (ViewHolder) convertView.getTag();
}
[...]
editText.setText(elementos.get(position).getVaznomeServico());
holder.btnEdit.setOnClickListener(onEditListener(position, holder));
holder.btnDelete.setOnClickListener(onDeleteListener(position, holder));
return convertView;
}
private View.OnClickListener onDeleteListener(final int position, final ViewHolder holder) {
return new View.OnClickListener() {
@Override
public void onClick(View v) {
/**--------------Tried it, not working =( ---------------*/
elementos.get(position).getVazID();
//listaVazamentos.remove(position);
//activity.listaVazamentos.remove(position);
//bd = context.openOrCreateDatabase("DesoExtraOficial", Activity.MODE_PRIVATE, null);
//bd.execSQL("DELETE from VazamentosToSQL where vazID = '" + elementos.get(position).getVazID() + "'");
//bd.close();
//elementos.remove(position);
Toast.makeText(context, "ID: "+elementos.get(position).getVazID(),Toast.LENGTH_LONG).show();
bd.deleteVazamentos(VazamentosToSQL);
holder.swipeLayout.close();
// activity.updateAdapter(); //Executa o método "updateAdapter()" na Activity "ExibeVazamentos"
/**--------------Tried it, not working =( ---------------*/
}
};
}
private class ViewHolder {
private TextView name;
private View btnDelete;
private View btnEdit;
private SwipeLayout swipeLayout;
private ListView listv;
public ViewHolder(View v) {
swipeLayout = (SwipeLayout)v.findViewById(R.id.swipe_layout);
btnDelete = v.findViewById(R.id.delete);
btnEdit = v.findViewById(R.id.edit_query);
listv = (ListView) v.findViewById(R.id.lvdenuncias);
swipeLayout.setShowMode(SwipeLayout.ShowMode.PullOut);
}
}
公共类vazamentosAdapter扩展了ArrayAdapter{
私人最终语境；
私人最终ArrayList elementos；
文件imgFile；
私有位图；
私有出口接口出口对象；
私人进出口活动；
瓦齐德；
私有sqlitebd数据库；
公共vazamentosAdapter（上下文，数组列表元素）{
超级（上下文，R.layout.linha，elementos）；
this.context=上下文；
this.elementos=elementos；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
视窗座；
LayoutFlater充气器=（LayoutFlater）上下文
.getSystemService（上下文布局\充气机\服务）；
if（convertView==null）{
//从XML文件膨胀UI
convertView=充气机。充气（R.layout.linha，父项，false）；
//获取所有UI视图
支架=新的视图支架（convertView）；
//为支架设置标签
convertView.setTag（支架）；
}否则{
//如果创建了保持架，则从视图中获取标记
holder=（ViewHolder）convertView.getTag（）；
}
[...]
setText（elementos.get（position.getVaznomeServico（））；
holder.btnEdit.setOnClickListener（onEditListener（位置，holder））；
holder.btnDelete.setOnClickListener（onDeleteListener（位置，holder））；
返回视图；
}
private View.OnClickListener onDeleteListener（最终int位置，最终ViewHolder）{
返回新视图。OnClickListener（）{
@凌驾
公共void onClick（视图v）{
/**--------------试过了，没用=（---------------*/
get（position.getVazID（）；
//listaVazamentos.移除（位置）；
//activity.listaVazamentos.remove（位置）；
//bd=context.openOrCreateDatabase（“DesoExtraOficial”，Activity.MODE_PRIVATE，null）；
//bd.execSQL（“从VazamentosToSQL中删除，其中vazID=”+elementos.get（position.getVazID（）+”）；
//bd.close（）；
//元素。移除（位置）；
Toast.makeText（上下文，“ID:+elementos.get（position）.getVazID（），Toast.LENGTH_LONG.show（）；
bd.deleteVazamentos（VazamentosToSQL）；
保持架。swipeLayout.close（）；
//activity.updateAdapter（）；//Ex
public class vazamentosAdapter extends ArrayAdapter<VazamentosToSQL> {
private final Context context;
private final ArrayList<VazamentosToSQL> elementos;
File imgFile;
private Bitmap bitmap;
private ExifInterface exifObject;
private ExibeVazamentosActivity activity;
int vazID;
private SQLiteDatabase bd;
public vazamentosAdapter(Context context, ArrayList<VazamentosToSQL> elementos) {
super(context, R.layout.linha, elementos);
this.context = context;
this.elementos = elementos;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
// inflate UI from XML file
convertView = inflater.inflate(R.layout.linha, parent, false);
// get all UI view
holder = new ViewHolder(convertView);
// set tag for holder
convertView.setTag(holder);
}else {
// if holder created, get tag from view
holder = (ViewHolder) convertView.getTag();
}
[...]
editText.setText(elementos.get(position).getVaznomeServico());
holder.btnEdit.setOnClickListener(onEditListener(position, holder));
holder.btnDelete.setOnClickListener(onDeleteListener(position, holder));
return convertView;
}
private View.OnClickListener onDeleteListener(final int position, final ViewHolder holder) {
return new View.OnClickListener() {
@Override
public void onClick(View v) {
/**--------------Tried it, not working =( ---------------*/
elementos.get(position).getVazID();
//listaVazamentos.remove(position);
//activity.listaVazamentos.remove(position);
//bd = context.openOrCreateDatabase("DesoExtraOficial", Activity.MODE_PRIVATE, null);
//bd.execSQL("DELETE from VazamentosToSQL where vazID = '" + elementos.get(position).getVazID() + "'");
//bd.close();
//elementos.remove(position);
Toast.makeText(context, "ID: "+elementos.get(position).getVazID(),Toast.LENGTH_LONG).show();
bd.deleteVazamentos(VazamentosToSQL);
holder.swipeLayout.close();
// activity.updateAdapter(); //Executa o método "updateAdapter()" na Activity "ExibeVazamentos"
/**--------------Tried it, not working =( ---------------*/
}
};
}
private class ViewHolder {
private TextView name;
private View btnDelete;
private View btnEdit;
private SwipeLayout swipeLayout;
private ListView listv;
public ViewHolder(View v) {
swipeLayout = (SwipeLayout)v.findViewById(R.id.swipe_layout);
btnDelete = v.findViewById(R.id.delete);
btnEdit = v.findViewById(R.id.edit_query);
listv = (ListView) v.findViewById(R.id.lvdenuncias);
swipeLayout.setShowMode(SwipeLayout.ShowMode.PullOut);
}
}
public int deleteVazamentos(VazamentosToSQL VazamentosToSQL) {
SQLiteDatabase db = this.getWritableDatabase();
int i = db.delete(TABELA_VAZAMENTOS, vazID+" =?", new String[] { String.valueOf(VazamentosToSQL.getVazID())});
db.close();
return i;
}
public void deleteVazamentos(int vazID) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABELA_VAZAMENTOS, "vazID=" + vazID, null);
}
bd.deleteVazamentos(elementos.get(position).getVazID());