我做了一些旅行，我想创建一个应用程序，允许我将出租车预订保存到数据库中。我只添加了几个字段，让我知道这一切是如何工作的。我对编程很陌生并且遵循了一些教程来创建一个应用程序，它允许我获取一个csv文件并将其上传到app数据库。这很好用，我没有显示数据的问题。
我设法让它同时使用Toast和警报来显示带有数据的窗口，但只有6个字段......我需要全部16个显示...
我已经对此做了一些调查，但是当我点击列表项时仍然存在应用程序终止问题。
我试图让一个Intent通过TaxiDetails中的新意图调用新的视图结果表。没有快乐...所有帮助表示赞赏。 代码如下 - 所有帮助表示感谢并提前感谢....
MainActivity.java
package com.stravides.jdw;
import android.app.AlertDialog;
import android.content.Context;
import android.app.Dialog;
import android.app.ListActivity;
import android.content.ActivityNotFoundException;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends ListActivity {
TextView lbl;
DBController controller = new DBController(this);
Button btnimport;
Button btnphone;
Button btnclear;
ListView lv;
ArrayList<HashMap<String, String>> myList;
public static final int requestcode = 1;
final Context context = this;
protected Cursor kursor;
protected ListAdapter adapter;
protected SQLiteDatabase db;
public AdapterView.OnItemClickListener mMessageClickedHandler = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
Intent intent = new Intent("com.stravides.jdw.TaxiDetails.class");
Cursor kursor = (Cursor) adapter.getItem(position);
intent.putExtra("TAXI_ID", kursor.getInt(kursor.getColumnIndex("_id")));
startActivity(intent);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lbl = (TextView) findViewById(R.id.txtresulttext);
btnimport = (Button) findViewById(R.id.btnupload);
btnphone = (Button) findViewById(R.id.btnphone);
btnclear = (Button) findViewById(R.id.btnclear);
lv = getListView();
btnimport.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent fileintent = new Intent(Intent.ACTION_GET_CONTENT);
fileintent.setType("gagt/sdf");
try {
startActivityForResult(fileintent, requestcode);
} catch (ActivityNotFoundException e) {
lbl.setText("No activity that can handle file selection. Showing alternatives.");
}
}
});
btnclear.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SQLiteDatabase db = controller.getWritableDatabase();
String tableName = "taxiinfo";
db.execSQL("delete from " + tableName);
myList = controller.getAllProducts();
if (myList.size() == 0) {
ListView lv = getListView();
ListAdapter adapter = new SimpleAdapter(MainActivity.this, myList,R.layout.v, new String[]
{"bID", "bDate", "bTime", "bFrom", "bTo","bFlightNum", "bFlightDest", "bPassenger", "bEmail", "bTelno", "bMobNo", "bCostCentre", "bPersNo", "bCombine", "bNumPass", "bRemarks"}, new int[]{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0});
setListAdapter(adapter);
lbl.setText("Data Cleared");
}
}
});
btnphone.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String uri = "tel:" + "0031251491418";
Intent intent = new Intent(Intent.ACTION_DIAL);
intent.setData(Uri.parse(uri));
startActivity(intent);
}
});
myList= controller.getAllProducts();
if (myList.size() != 0) {
ListView lv = getListView();
ListAdapter adapter = new SimpleAdapter(MainActivity.this, myList,
R.layout.v, new String[]{"bID", "bDate", "bTime", "bFrom", "bTo","bFlightNum", "bFlightDest", "bPassenger", "bEmail", "bTelno", "bMobNo", "bCostCentre", "bPersNo", "bCombine", "bNumPass", "bRemarks"}, new int[]{
R.id.txttaxibID, R.id.txttaxibDate, R.id.txttaxibTime,R.id.txttaxibFrom, R.id.txttaxibTo, R.id.txttaxibFlightNum, R.id.txttaxibFlightDest, R.id.txttaxibPassenger, R.id.txttaxibEmail, R.id.txttaxibTelno, R.id.txttaxibMobNo, R.id.txttaxibCostCentre, R.id.txttaxibPersNo, R.id.txttaxibCombine, R.id.txttaxibNumPass, R.id.txttaxibRemarks});
setListAdapter(adapter);
lbl.setText("");
}
lv.setOnItemClickListener(mMessageClickedHandler);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (data == null)
return;
switch (requestCode) {
case requestcode:
String filepath = data.getData().getPath();
controller = new DBController(getApplicationContext());
SQLiteDatabase db = controller.getWritableDatabase();
String tableName = "taxiinfo";
db.execSQL("delete from " + tableName);
try {
if (resultCode == RESULT_OK) {
try {
FileReader file = new FileReader(filepath);
BufferedReader buffer = new BufferedReader(file);
ContentValues contentValues = new ContentValues();
String line = "";
db.beginTransaction();
while ((line = buffer.readLine()) != null) {
String[] str = line.split(",", 16);
String bID = str[0];
String bDate = str[1];
String bTime = str[2];
String bFrom = str[3];
String bTo = str[4];
String bFlightNum = str[5];
String bFlightDest = str[6];
String bPassenger = str[7];
String bEmail = str[8];
String bTelno = str[9];
String bMobNo = str[10];
String bCostCentre = str[11];
String bPersNo = str[12];
String bCombine = str[13];
String bNumPass = str[14];
String bRemarks = str[15];
contentValues.put("bID", bID);
contentValues.put("bDate", bDate);
contentValues.put("bTime", bTime);
contentValues.put("bFrom", bFrom);
contentValues.put("bTo", bTo);
contentValues.put("bFlightNum", bFlightNum);
contentValues.put("bFlightDest", bFlightDest);
contentValues.put("bPassenger", bPassenger);
contentValues.put("bEmail", bEmail);
contentValues.put("bTelno", bTelno);
contentValues.put("bMobNo", bMobNo);
contentValues.put("bCostCentre", bCostCentre);
contentValues.put("bPersNo", bPersNo);
contentValues.put("bCombine", bCombine);
contentValues.put("bNumPass", bNumPass);
contentValues.put("bRemarks", bRemarks);
db.insert(tableName, null, contentValues);
lbl.setText("Successfully Updated Database.");
}
db.setTransactionSuccessful();
db.endTransaction();
} catch (IOException e) {
if (db.inTransaction())
db.endTransaction();
Dialog d = new Dialog(this);
d.setTitle(e.getMessage().toString() + "first");
d.show();
}
} else {
if (db.inTransaction())
db.endTransaction();
Dialog d = new Dialog(this);
d.setTitle("Only CSV files allowed");
d.show();
}
} catch (Exception ex) {
if (db.inTransaction())
db.endTransaction();
Dialog d = new Dialog(this);
d.setTitle(ex.getMessage().toString() + "second");
d.show();
}
}
myList= controller.getAllProducts();
if (myList.size() != 0) {
ListView lv = getListView();
ListAdapter adapter = new SimpleAdapter(MainActivity.this, myList,
R.layout.v, new String[]{"bID", "bDate", "bTime", "bFrom", "bTo","bFlightNum", "bFlightDest", "bPassenger", "bEmail", "bTelno", "bMobNo", "bCostCentre", "bPersNo", "bCombine", "bNumPass", "bRemarks"}, new int[]{
R.id.txttaxibID, R.id.txttaxibDate, R.id.txttaxibTime,R.id.txttaxibFrom, R.id.txttaxibTo, R.id.txttaxibFlightNum, R.id.txttaxibFlightDest, R.id.txttaxibPassenger, R.id.txttaxibEmail, R.id.txttaxibTelno, R.id.txttaxibMobNo, R.id.txttaxibCostCentre, R.id.txttaxibPersNo, R.id.txttaxibCombine, R.id.txttaxibNumPass, R.id.txttaxibRemarks});
}
}
}
DBController.java
package com.stravides.jdw;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import java.util.ArrayList;
import java.util.HashMap;
public class DBController extends SQLiteOpenHelper {
private static final String LOGCAT = null;
public DBController(Context applicationcontext) {
super(applicationcontext, "jdwtaxi.db", null, 1); // creating DATABASE
Log.d(LOGCAT, "Created");
}
@Override
public void onCreate(SQLiteDatabase database) {
String query;
query = "CREATE TABLE IF NOT EXISTS taxiinfo ( Id INTEGER PRIMARY KEY, bID TEXT,bDate TEXT, bTime TEXT,bFrom TEXT, bTo TEXT, bFlightNum TEXT, bFlightDest TEXT, bPassenger TEXT, bEmail TEXT, bTelno TEXT, bMobNo TEXT, bCostCentre TEXT, bPersNo TEXT, bCombine TEXT, bNumPass TEXT, bRemarks TEXT)";
database.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase database, int version_old,int current_version) {
String query;
query = "DROP TABLE IF EXISTS taxiinfo";
database.execSQL(query);
onCreate(database);
}
public ArrayList<HashMap<String, String>> getAllProducts() {
ArrayList<HashMap<String, String>> taxiList;
taxiList = new ArrayList<HashMap<String, String>>();
String selectQuery = "SELECT * FROM taxiinfo";
SQLiteDatabase database = this.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
//Id, Company,Name,Price
HashMap<String, String> map = new HashMap<String, String>();
map.put("Id", cursor.getString(0));
map.put("bID", cursor.getString(1));
map.put("bDate", cursor.getString(2));
map.put("bTime", cursor.getString(3));
map.put("bFrom", cursor.getString(4));
map.put("bTo", cursor.getString(5));
map.put("bFlightNum", cursor.getString(6));
map.put("bFlightDest", cursor.getString(7));
map.put("bPassenger", cursor.getString(8));
map.put("bEmail", cursor.getString(9));
map.put("bTelno", cursor.getString(10));
map.put("bMobNo", cursor.getString(11));
map.put("bCostCentre", cursor.getString(12));
map.put("bPersNo", cursor.getString(13));
map.put("bCombine", cursor.getString(14));
map.put("bNumPass", cursor.getString(15));
map.put("bRemarks", cursor.getString(16));
taxiList.add(map);
} while (cursor.moveToNext());
}
return taxiList;
}
}
TaxiDetails.java
package com.stravides.jdw;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.TextView;
/**
* Created by Ken on 09/08/2015.
*/
public class TaxiDetails extends Activity {
protected TextView bID;
protected TextView bDate;
protected TextView bTime;
protected TextView bFrom;
protected TextView bTo;
protected TextView bFlightNum;
protected TextView bFlightDest;
protected TextView bPassenger;
protected TextView bEmail;
protected TextView bTelno;
protected TextView bMobNo;
protected TextView bCostCentre;
protected TextView bPersNo;
protected TextView bCombine;
protected TextView bNumPass;
protected TextView bRemarks;
protected int taxiPos;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.resultstable);
taxiPos = getIntent().getIntExtra("TAXI_ID", 0);
SQLiteDatabase db = (new DBController(this)).getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT bID, bDate, bCombine FROM taxiinfo WHERE bID = ?", new String[]{""+taxiPos});
if (cursor.getCount() == 1)
{
cursor.moveToFirst();
bID = (TextView) findViewById(R.id.txttaxibID2);
bID.setText(cursor.getString(cursor.getColumnIndex("bID")));
bDate = (TextView) findViewById(R.id.txttaxibDate2);
bDate.setText(cursor.getString(cursor.getColumnIndex("bDate")));
bCombine = (TextView) findViewById(R.id.txttaxibCombine2);
bCombine.setText(cursor.getString(cursor.getColumnIndex("bCombine")));
}
}
}
activity_main.xml中
<?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:orientation="vertical"
android:weightSum="9"
android:background="#FFC7C7C7"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Booking Details"
android:id="@+id/textView"
android:layout_gravity="center_horizontal"
android:layout_weight="0.24" />
<!-- divider -->
<LinearLayout
android:id="@+id/lvcontainer"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
android:layout_alignParentTop="true"
android:orientation="horizontal"
android:padding="1dp"
android:background="#FFC7C7C7"
android:weightSum="6">
<TextView
android:id="@+id/txttaxibID"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".8"
android:gravity="left"
android:text="Ref"
android:textColor="#000000"
android:textSize="13sp"
android:clickable="false" />
<TextView
android:id="@+id/txttaxibDate"
android:layout_width="15dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:padding="3dp"
android:text="Date"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibTime"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".8"
android:gravity="left"
android:text="Time"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibFrom"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="From"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibTo"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="To"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibCombine"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="Combine"
android:padding="1dp"
android:textColor="#000000"
android:textSize="13sp" />
</LinearLayout>
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_below="@+id/lvcontainer"
android:layout_weight="6.59"
android:clickable="false"></ListView>
<TextView
android:id="@+id/txtresulttext"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginLeft="5dp"
android:layout_below="@android:id/list"
android:layout_marginTop="2dp"
android:layout_weight="0.5"
android:gravity="left"
android:text=""
android:textColor="#FFF55F54"
android:textSize="10sp"
android:textStyle="italic|bold"></TextView>
<LinearLayout
android:id="@+id/lvbottom"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:layout_weight="1"
android:weightSum="1">
<Button
android:id="@+id/btnupload"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.33"
android:gravity="center"
android:text="UPLOAD"
android:textColor="#ffffff"
android:background="#1083f5"
android:textSize="15sp"
android:textStyle="bold" />
<Button
android:id="@+id/btnclear"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.33"
android:gravity="center"
android:text="CLEAR"
android:textColor="#ffffff"
android:background="#1003f5"
android:textSize="15sp"
android:textStyle="bold" />
<Button
android:id="@+id/btnphone"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.34"
android:gravity="center"
android:text="CALL JDW"
android:textColor="#ffffff"
android:background="#ffff0000"
android:textSize="15sp"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
v.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/lvh"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:scrollbars="horizontal"
android:background="#ffe6e6e6"
android:weightSum="5"
android:minHeight="30dp"
android:measureWithLargestChild="false"
android:longClickable="false">
<TextView
android:id="@+id/txttaxibID"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="Ref"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibDate"
android:layout_width="15dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:padding="3dp"
android:text="Date"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibTime"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="Time"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibFrom"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="From"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
<TextView
android:id="@+id/txttaxibTo"
android:layout_width="1dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="To"
android:padding="3dp"
android:textColor="#000000"
android:textSize="13sp" />
</LinearLayout>
</LinearLayout>
resultstable.xml
<TextLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/status2"
android:layout_width="wrap_content"
android:layout_gravity="center"
android:text="Booking Details"
android:textColor="#890000"
android:textSize="25sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/txttaxibID2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:layout_marginLeft="20dip"
/>
<TextView
android:id="@+id/txttaxibDate2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:layout_marginLeft="20dip" />
<TextView
android:id="@+id/txttaxibCombine2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:layout_marginLeft="20dip" />
</TextLayout>
用于测试的csv数据
372187,20/09/2015,20:00,Schiphol Taxi Counter Jan de Wit Group,Hotel Lion D'or Golden Tulip,KL1064,Cardiff,Ken Midgley,me@home.com,Ken Midgley,441234567889,41024830,1044889,None,1,
372188,21/09/2015,08:00,Hotel Lion D'or Golden Tulip,3H.18 Dudokhuis Hoofdingang,None,None,Ken Midgley,me@home.com,Ken Midgley,441234567889,41024830,1044889,None,1,Have to be in office by 8:30!!!
372189,21/09/2015,17:30,3H.18 Dudokhuis Hoofdingang,Hotel Lion D'or Golden Tulip,None,None,Ken Midgley,me@home.com,Ken Midgley,441234567889,41024830,1044889,None,1,
372190,22/09/2015,08:00,Hotel Lion D'or Golden Tulip,3H.18 Dudokhuis Hoofdingang,None,None,Ken Midgley,me@home.com,Ken Midgley,441234567889,41024830,1044889,None,2,Mike Smith. Have to be in office by 8:30!!!
答案 0 :(得分：0)
您需要在OnItemClickListener上设置ListView。以下是一个简单的教程 - http://www.mkyong.com/android/android-listview-example/
在学会拦截和处理事件后，您可以开始考虑导航到详细信息活动或打开详细信息对话框。
我建议你浏览http://developer.android.com中的所有基本教程 - 你需要的就是那里。
答案 1 :(得分：0)
我这样做：
public void onClickList(final ListView list) {
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(final AdapterView<?> parent,
final View view, final int position, long id) {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setCancelable(false);
alert.setMessage("youre message");
final AlertDialog.Builder ok = alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which){
//add your code here
dialog.dismiss();
}
});
alert.show();
}
});
}
列表是您创建的ListView对象。您可以将此方法onClickListener()发送到ListView以管理弹出窗口。顺便说一句，您可以创建自己的xml布局来呈现自定义视图。
答案 2 :(得分：0)
感谢您对上述方面的帮助 - 我现在设法解决了这个问题。
问题在于认真传递点击的位置......
MainActivity.java 需要以下内容......
public AdapterView.OnItemClickListener mMessageClickedHandler = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
Intent intent = new Intent(MainActivity.this,TaxiDetails.class);
intent.putExtra("TAXI_ID", position);
startActivity(intent);
}
};
TaxiDetails.java 然后可以在意图中获取额外信息
taxiPos = getIntent().getIntExtra("TAXI_ID", 0);
taxiPos=taxiPos+1;
SQLiteDatabase db = (new DBController(this)).getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT * FROM taxiinfo WHERE Id = ?", new String[]{""+taxiPos});
if (cursor.getCount() == 1)