所有事务 Activity 都用于从数据库获取数据
public class AllTransactionActivity extends MainActivity {
ArrayList<String> price = new ArrayList<String>();
ArrayList<String> category = new ArrayList<String>();
ArrayList<String> date = new ArrayList<String>();
ArrayList<String> id = new ArrayList<String>();
ArrayList<String> payment_mode = new ArrayList<String>();
ArrayList<String> description = new ArrayList<String>();
RadioButton rb1 , rb2 ;
ListView listView ;
Cursor cv;
LinearLayout list_lay;
RelativeLayout no_data_lay;
String date_change;
Boolean check_btn = false;
Transactiondata data ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_all_transaction);
findViewById();
Toolbar toolbarTop = (Toolbar) findViewById(R.id.toolbar);
TextView mTitle = (TextView) toolbarTop.findViewById(R.id.title);
mTitle.setText("All Transaction");
data = new Transactiondata(AllTransactionActivity.this);
data.open();
cv = data.incomeDisplayData();
id.clear();
price.clear();
category.clear();
date.clear();
payment_mode.clear();
description.clear();
if (cv.moveToFirst()) {
do {
category.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_CATEGORY)));
id.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_ID)));
// date.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_DATE)));
SimpleDateFormat simpleDateFormate = new SimpleDateFormat("yyyy-MM-dd");
Date date1 = null;
try {
date1 = simpleDateFormate.parse(cv.getString(cv.getColumnIndex(Transactiondata.KEY_DATE)));
SimpleDateFormat fmtOut = new SimpleDateFormat("dd-MM-yyyy");
date_change = fmtOut.format(date1);
} catch (ParseException e) {
e.printStackTrace();
}
date.add(date_change);
price.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_PRICE)));
payment_mode.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_PAYMENT_MODE)));
description.add(cv.getString(cv.getColumnIndex(Transactiondata.KEY_DESCRIPTION)));
} while (cv.moveToNext());
}else {
list_lay.setVisibility(View.GONE);
no_data_lay.setVisibility(View.VISIBLE);
}
listView.setAdapter(new DisplayAllDataAdapter(this, AllTransactionActivity.this , check_btn , id , category , date , price , payment_mode , description ));
cv.close();
}
public void findViewById(){
listView = (ListView)findViewById(R.id.list);
rb1 =(RadioButton)findViewById(R.id.rb1) ;
rb2 =(RadioButton)findViewById(R.id.rb2) ;
no_data_lay = (RelativeLayout)findViewById(R.id.no_data_lay);
list_lay = (LinearLayout)findViewById(R.id.list_lay);
}
}
自定义适配器类，用于将数据与 ListView 绑定(bind)
package app.dailyexpensemanager.adapters;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.ArrayList;
import app.dailyexpensemanager.R;
import app.dailyexpensemanager.activity.EditReminderActivity;
import app.dailyexpensemanager.activity.PaymentTransactionActivity;
import app.dailyexpensemanager.db.Transactiondata;
public class DisplayAllDataAdapter extends BaseAdapter {
private Context mContext;
private static Cursor cursor;
private static Activity activity;
private static Boolean check_btn;
private ArrayList<String> category_list;
private ArrayList<String> date_list;
private ArrayList<String> id_list ;
private ArrayList<String> price_list ;
private ArrayList<String> payment_mode_list ;
private ArrayList<String> description_list ;
public DisplayAllDataAdapter(Context cv, Activity activity, Boolean check_btn, ArrayList<String> id, ArrayList<String> category, ArrayList<String> date,
ArrayList<String> price, ArrayList<String> payment_mode, ArrayList<String> description) {
this.check_btn = check_btn;
this.id_list = id;
this.category_list = category;
this.date_list = date;
this.price_list = price;
this.payment_mode_list = payment_mode;
this.description_list = description;
this.mContext = cv;
this.activity = activity;
}
public DisplayAllDataAdapter(Context cv, Activity activity,Cursor cursor , Boolean check_btn, ArrayList<String> id, ArrayList<String> category, ArrayList<String> date,
ArrayList<String> price, ArrayList<String> payment_mode, ArrayList<String> description) {
this.check_btn = check_btn;
this.id_list = id;
this.category_list = category;
this.date_list = date;
this.price_list = price;
this.payment_mode_list = payment_mode;
this.description_list = description;
this.mContext = cv;
this.activity = activity;
this.cursor = cursor;
}
@Override
public int getCount() {
return date_list.size();
}
@Override
public Object getItem(int position) {
return date_list.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View child, ViewGroup parent) {
final Holder mHolder;
LayoutInflater layoutInflater = null;
if (child == null) {
layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
child = layoutInflater.inflate(R.layout.activity_list_all_transaction, null);
mHolder = new Holder();
mHolder.txt_category = (TextView) child.findViewById(R.id.category);
mHolder.txt_date = (TextView) child.findViewById(R.id.date);
mHolder.txt_id = (TextView) child.findViewById(R.id.id);
mHolder.txt_price = (TextView) child.findViewById(R.id.price);
mHolder.txt_payment = (TextView) child.findViewById(R.id.payment);
mHolder.txt_description = (TextView) child.findViewById(R.id.description);
child.setTag(mHolder);
}
else {
mHolder = (Holder) child.getTag();
}
mHolder.txt_category.setText(category_list.get(position));
mHolder.txt_date.setText(date_list.get(position));
mHolder.txt_id.setText(id_list.get(position));
mHolder.txt_price.setText(price_list.get(position));
mHolder.txt_payment.setText(payment_mode_list.get(position));
mHolder.txt_description.setText(description_list.get(position));
child.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
v.setBackgroundResource(R.drawable.item_pressed);
/*Animation animation1 = new AlphaAnimation(0.3f, 1.0f);
animation1.setDuration(2000);
v.startAnimation(animation1);*/
String price_lv = mHolder.txt_price.getText().toString();
String id_lv = mHolder.txt_id.getText().toString();
String category_lv = mHolder.txt_category.getText().toString();
String payment_lv = mHolder.txt_payment.getText().toString();
String date_lv = mHolder.txt_date.getText().toString();
String description_lv = mHolder.txt_description.getText().toString();
showCustomeDialogBox(mContext, false, price_lv, id_lv, category_lv, payment_lv,
date_lv, description_lv);
// notifyDataSetChanged();
}
});
return child;
}
public class Holder {
TextView txt_category;
TextView txt_price;
TextView txt_id;
TextView txt_date;
TextView txt_payment;
TextView txt_description;
}
public static void showCustomeDialogBox(final Context context, final boolean activityVisibility,String price,
final String id , String category , String payment , String date , String description ) {
final Dialog dialog = new Dialog(context);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setCancelable(true);
dialog.setContentView(R.layout.activity_custom_dailog);
Button positivebtn = (Button) dialog.findViewById(R.id.positive);
Button negativebtn = (Button) dialog.findViewById(R.id.negative);
LinearLayout category_lay = (LinearLayout) dialog.findViewById(R.id.category_lay);
TextView dialog_title = (TextView) dialog.findViewById(R.id.dialog_title);
TextView price_tv = (TextView) dialog.findViewById(R.id.price);
TextView category_tv = (TextView) dialog.findViewById(R.id.category);
TextView payment_tv = (TextView) dialog.findViewById(R.id.payment_mode);
TextView date_tv = (TextView) dialog.findViewById(R.id.date);
TextView description_tv = (TextView) dialog.findViewById(R.id.description);
category_lay.setVisibility(View.GONE);
dialog_title.setText(category);
price_tv.setText(price);
category_tv.setText(category);
payment_tv.setText(payment);
date_tv.setText(date);
description_tv.setText(description);
positivebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!check_btn) {
Transactiondata delete = new Transactiondata(context);
delete.open();
delete.deleteIncomeEntry(id);
this.notifyDataSetChanged();
delete.close();
/*recreate all transaction Activity .... to refresh data ..........*/
activity.recreate();
dialog.dismiss();
} else {
Transactiondata delete = new Transactiondata(context);
delete.open();
delete.deleteExpenseEntry(id);
this.notifyDataSetChanged();
delete.close();
/*recreate all transaction Activity .... to refresh data ..........*/
activity.recreate();
dialog.dismiss();
}
}
});
negativebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
Window window = dialog.getWindow();
window.setLayout(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
}
}
在对话框代码中，我已经通过重新创建 Activity 完成了它，但我认为这不是一个好的解决方案。现在如何仅删除和刷新同时 ListView 数据？帮助我:(
最佳答案
试试这个，
positivebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!check_btn) {
Transactiondata delete = new Transactiondata(context);
delete.open();
delete.deleteIncomeEntry(id);
notifyDataSetChanged();
delete.close();
/*recreate all transaction Activity .... to refresh data ..........*/
activity.recreate();
dialog.dismiss();
} else {
Transactiondata delete = new Transactiondata(context);
delete.open();
delete.deleteExpenseEntry(id);
notifyDataSetChanged();
delete.close();
/*recreate all transaction Activity .... to refresh data ..........*/
activity.recreate();
dialog.dismiss();
}
}
});
关于java - 从数据库中删除数据后如何刷新 ListView ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37385133/