我有一个预算应用程序，在单独的片段中，我显示了由用户提供的收入和费用。我想创建一个对话框，显示用户填写费用/收入表时插入的日期和注释。
下面是我的数据库助手，以便在我不清楚我的意思时显示信息。
package com.dharquissandas.budget;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.view.View;
import android.util.Log;
public class DatabaseHelper extends SQLiteOpenHelper {
private static final String TAG = "DatabaseHelper";
public static final String DATABASE_NAME = "budget.db";
public static final String TABLE_NAME = "expense_table";
public static final String TABLE_NAME2 = "income_table";
public static final String COL_1 = "ID";
public static final String COL_2 = "ID2";
public static final String EXPENSE_AMOUNT = "AMOUNT";
public static final String EXPENSE_DATE = "DATE";
public static final String EXPENSE_NOTES = "NOTES";
public static final String INCOME_AMOUNT = "AMOUNT";
public static final String INCOME_DATE = "DATE";
public static final String INCOME_NOTES = "NOTES";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 3);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT,AMOUNT INTEGER,DATE INTEGER,NOTES TEXT)");
db.execSQL("create table " + TABLE_NAME2 + " (ID INTEGER PRIMARY KEY AUTOINCREMENT,AMOUNT INTEGER,DATE INTEGER,NOTES TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME2);
onCreate(db);
}
public boolean insertexpenseData(String amount_expense, String date_expense, String notes_expense) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(EXPENSE_AMOUNT, amount_expense);
contentValues.put(EXPENSE_DATE, date_expense);
contentValues.put(EXPENSE_NOTES, notes_expense);
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1)
return false;
else
return true;
}
public boolean insertincomeData(String amount_income, String date_income, String notes_income) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(INCOME_AMOUNT, amount_income);
contentValues.put(INCOME_DATE, date_income);
contentValues.put(INCOME_NOTES, notes_income);
long result = db.insert(TABLE_NAME2, null, contentValues);
if (result == -1)
return false;
else
return true;
}
public Cursor getexpenseData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME, null);
return res;
}
public Cursor getincomeData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME2, null);
return res;
}
public Cursor getexpenseItemID(String name){
SQLiteDatabase db = this.getWritableDatabase();
String query = "SELECT " + COL_1 + " FROM " + TABLE_NAME + " WHERE " + EXPENSE_AMOUNT + " = '" + name + "'";
Cursor data = db.rawQuery(query, null);
return data;
}
public Cursor getincomeItemID(String name){
SQLiteDatabase db = this.getWritableDatabase();
String query = "SELECT " + COL_2 + " FROM " + TABLE_NAME2 + " WHERE " + INCOME_AMOUNT + " = '" + name + "'";
Cursor data = db.rawQuery(query, null);
return data;
}
public boolean updateexpenseData(String id, String amount, String date, String notes) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COL_1, id);
contentValues.put(EXPENSE_AMOUNT, amount);
contentValues.put(EXPENSE_DATE, date);
contentValues.put(EXPENSE_NOTES, notes);
db.update(TABLE_NAME, contentValues, "ID = ?", new String[]{id});
return true;
}
public boolean updateincomeData(String id, String amount, String date, String notes) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(COL_2, id);
contentValues.put(INCOME_AMOUNT, amount);
contentValues.put(INCOME_DATE, date);
contentValues.put(INCOME_NOTES, notes);
db.update(TABLE_NAME2, contentValues, "ID = ?", new String[]{id});
return true;
}
public Integer deleteexpenseData(String id) {
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME, "ID = ?", new String[]{id});
}
public Integer deleteincomeData(String id) {
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME2, "ID = ?", new String[]{id});
}
}
以下是我希望点击特定金额以显示与其相关的其他信息的列表。
package com.dharquissandas.budget;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.database.Cursor;
import android.util.Log;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.widget.Toast;
import java.util.ArrayList;
import static android.R.attr.button;
public class tab3expense extends Fragment {
private static final String TAG = "tab3expense";
DatabaseHelper mDatabaseHelper;
private ListView mListView;
View rootView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.tab3expense, container, false);
return rootView;
}
@Override
public void onActivityCreated( Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mListView = (ListView) rootView.findViewById(R.id.listViewexpense);
mDatabaseHelper = new DatabaseHelper(getActivity());
populateListView();
}
private void populateListView() {
Log.d(TAG, "populateListView: Displaying data in the ListView.");
//get the data and append to a list
Cursor data = mDatabaseHelper.getexpenseData();
ArrayList<String> listData = new ArrayList<>();
while(data.moveToNext()){
//get the value from the database in column 1
//then add it to the ArrayList
listData.add(data.getString(1));
}
//create the list adapter and set the adapter
ListAdapter adapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1, listData);
mListView.setAdapter(adapter);
//set an onItemClickListener to the ListView
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String name = adapterView.getItemAtPosition(i).toString();
Log.d(TAG, "onItemClick: You Clicked on " + name);
Cursor data = mDatabaseHelper.getexpenseItemID(name); //get the id associated with that name
int itemID = -1;
while(data.moveToNext()){
itemID = data.getInt(0);
}
if(itemID > -1){
Log.d(TAG, "onItemClick: The ID is: " + itemID);
Intent editScreenIntent = new Intent(getActivity(), add_expense.class);
editScreenIntent.putExtra("id",itemID);
editScreenIntent.putExtra("name",name);
startActivity(editScreenIntent);
}
else{
toastMessage("No ID associated with that name");
}
}
});
}
/**
* customizable toast
* @param message
*/
private void toastMessage(String message){
Toast.makeText(getActivity(),message, Toast.LENGTH_SHORT).show();
}
}
很抱歉发布了很多代码我是android编程的新手，我真的很感激帮助。
答案 0 :(得分：0)
如果你按照@ Nongthonbam Tonthoi所说的那样，你会发现它实现起来非常简单，但我会在下面给你看一些示例代码。
您可以为自定义对话框创建一个方法，该方法包含两个参数 - 注释和日期值，如下所示
public void displayNoteDate(String noteContent, String dateValue) {
final Dialog builder = new Dialog(this);
builder.setContentView(R.layout.custom_dialog);
builder.setTitle("Display note date");
TextView note = (TextView)builder.findViewById(R.id.note);
TextView date = (TextView)builder.findViewById(R.id.date);
//add the database note and date
note.setText(noteContent);
date.setText(dateValue);
Button closeButton = (Button)builder.findViewById(R.id.close);
closeButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
builder.dismiss();
}
});
builder.show();
}
xml布局文件包含2个用于注释和日期的TextView以及一个用于关闭对话框的按钮。
<强> custom_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="vertical">
<TextView
android:id="@+id/note"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""/>
<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:text=""/>
<Button
android:id="@+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:layout_gravity="center"
android:text="close"/>
</LinearLayout>
希望有所帮助