Android 如何在相应列下插入数据值？

嗨，我是android应用程序开发新手？ 我已经成功地让我的数据库获取并存储我的数据值。 但由于某种原因，当我查看数据库时，它们会紧接着插入，中间有一个空格。 如何使输入的值落在相应的列下

我的数据库是Java

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 LogsDB {

static final String Key_ROWID = "_id";
static final String Key_Date = "Date";
static final String Key_Milkers = "Milkers";
static final String Key_Feeders = "Feeder";
static final String Key_Mastitis = "Mastitis";
static final String Key_Beef = "Beef";

static final String DATABASE_NAME = "LogsDB";
static final String DATABASE_TABLE = "Logs";
static final int DATABASE_VERSION = 1;

private DatabaseHelper myhelper;
private final Context myContext;
private SQLiteDatabase myDatabase;

private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
        db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
                Key_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "         +
                Key_Date  + " TEXT NOT NULL, " +
                Key_Milkers + " TEXT NOT NULL, " +
                Key_Feeders + " TEXT NOT NULL, " +
                Key_Mastitis + " INTEGER NOT NULL, " +
                Key_Beef + " INTEGER NOT NULL);"
                );
    } 
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
    db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
    onCreate(db);
    }
}
public LogsDB(Context c){
    myContext = c;
}
public LogsDB open() throws SQLException{
    myhelper = new DatabaseHelper(myContext);
    myDatabase = myhelper.getWritableDatabase();
    return this;
}
public void close(){
    myhelper.close();
}
public long creatEntry(String date, String milkers, String feeders,
        String mastitis, String beef) {
    // TODO Auto-generated method stub
    ContentValues cv = new ContentValues();
    cv.put(Key_Date, date);
    cv.put(Key_Milkers, milkers);
    cv.put(Key_Feeders, feeders);
    cv.put(Key_Mastitis, mastitis);
    cv.put(Key_Beef, beef);
    return myDatabase.insert(DATABASE_TABLE, null, cv);

}
public String getData() {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
    String result = "";

    int iRow = c.getColumnIndex(Key_ROWID);
    int iDate = c.getColumnIndex(Key_Date);
    int iMilkers = c.getColumnIndex(Key_Milkers);
    int iFeeders = c.getColumnIndex(Key_Feeders);
    int iMastitis = c.getColumnIndex(Key_Mastitis);
    int iBeef = c.getColumnIndex(Key_Beef);

    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
        result = result  + c.getString(iRow) + " " + c.getString(iDate) + " " + c.getString(iMilkers) + " " +
                c.getString(iFeeders) + " " + c.getString(iMastitis) + " " + c.getString(iBeef) + "\n";

    }
    return result;
}
public String getDate(long l) {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, Key_ROWID + "=" + l, null, null, null, null);
    if (c !=null);{
        c.moveToFirst();
        String date = c.getString(1);
        return date; 
    }
}
public String getmilkers(long l) {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, Key_ROWID + "=" + l, null, null, null, null);
    if (c !=null);{
        c.moveToFirst();
        String milkers = c.getString(2);
        return milkers;
}
}   
public String getfeeders(long l) {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, Key_ROWID + "=" + l, null, null, null, null);
    if (c !=null);{
        c.moveToFirst();
        String feeders = c.getString(3);
        return feeders;
    }
}
public String getmastitis(long l) {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, Key_ROWID + "=" + l, null, null, null, null);
    if (c !=null);{
        c.moveToFirst();
        String mastitis = c.getString(4);
        return mastitis;
    }
}
public String getbeef(long l) {
    // TODO Auto-generated method stub
    String[] columns = new String[]{ Key_ROWID, Key_Date, Key_Milkers, Key_Feeders, Key_Mastitis, Key_Beef};
    Cursor c = myDatabase.query(DATABASE_TABLE, columns, Key_ROWID + "=" + l, null, null, null, null);
    if (c !=null);{
        c.moveToFirst();
        String beef = c.getString(5);
        return beef;
}

}
public void updateEntry(long lRow, String edate, String emilkers,
        String efeeders, String emastitis, String ebeef) {
    // TODO Auto-generated method stub
    ContentValues Cvedit = new ContentValues();
    Cvedit.put(Key_Date, edate);
    Cvedit.put(Key_Milkers, emilkers);
    Cvedit.put(Key_Feeders, efeeders);
    Cvedit.put(Key_Mastitis, emastitis);
    Cvedit.put(Key_Beef, ebeef);
    myDatabase.update(DATABASE_TABLE, Cvedit, Key_ROWID + "=" + lRow, null);

}
public void deleteEntry(long lRow1) {
    // TODO Auto-generated method stub
    myDatabase.delete(DATABASE_TABLE, Key_ROWID + "=" + lRow1, null);
}
}

我的ViewLogs是java

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Viewlogs extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_viewlogs); 
    TextView tv = (TextView) findViewById(R.id.tvSqlinfo);
    LogsDB info = new LogsDB(this);
    info.open();
    String data = info.getData();
    info.close();
    tv.setText(data);
}
}

我的数据库XML

<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout 
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context=".Daily_log" >
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/daily_log"
    android:textSize="20sp" />

<EditText
    android:id="@+id/date"
    android:layout_width="258dp"
    android:layout_height="wrap_content"
    android:hint="@string/date" 
    android:inputType="date"/>

<EditText
    android:id="@+id/milkers"
    android:layout_width="258dp"
    android:layout_height="wrap_content"
    android:hint="@string/milkers" />
<EditText
    android:id="@+id/feeders"
    android:layout_width="252dp"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/feeders" />
<EditText
    android:id="@+id/mastitis"
    android:layout_width="252dp"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/mastitis"
    android:inputType="text"/>

<EditText
    android:id="@+id/beef"
    android:layout_width="252dp"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/beef"
    android:inputType="text"/>

<Button
    android:id="@+id/addlog"
    android:layout_width="261dp"
    android:layout_height="wrap_content"
    android:onClick="addlog"
    android:text="@string/add_daily" />

<Button
    android:id="@+id/viewlogs"
    android:layout_width="261dp"
    android:layout_height="wrap_content"
    android:onClick="viewlogs"
    android:text="@string/view_logs"/>

<EditText
    android:id="@+id/finddate"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="date"/>
<Button
    android:id="@+id/info"
    android:layout_width="261dp"
    android:layout_height="wrap_content"
    android:onClick="addlog"
    android:text="@string/get_info" />
<Button
    android:id="@+id/editlog"
    android:layout_width="261dp"
    android:layout_height="wrap_content"
    android:onClick="addlog"
    android:text="@string/edit_log" />
<Button
    android:id="@+id/deletelogs"
    android:layout_width="261dp"
    android:layout_height="wrap_content"
    android:onClick="viewlogs"
    android:text="@string/delete_log"/>
</LinearLayout>
</ScrollView>

非常感谢你的帮助。

---

谢谢

您的getData方法似乎返回了一个由空格分隔的字符串：

 result = result  + c.getString(iRow) + " " + c.getString(iDate) + " " + c.getString(iMilkers) + " " +
            c.getString(iFeeders) + " " + c.getString(iMastitis) + " " + c.getString(iBeef) + "\n";

最好将其作为数组返回，并使用该数组显示结果，或者使用管道或逗号对其进行分隔：+“|”+”或+“，”并拆分以显示结果

---

我没有看到“setText”方法显示结果的方式…

在数据库文件add中尝试下面的代码-

ArrayList<HashMap<String, String>> list;
if (c.moveToFirst()) {
        do {
            HashMap<String, String> map = new HashMap<String, String>();
            map.put("iRoW", c.getString(0));
            map.put("iDate", c.getString(1));
            map.put("iFeeders", c.getString(2));
            list.add(map);
        } while (c.moveToNext());
    }
    c.close();
    return list;

ArrayList列表；
if（c.moveToFirst（））{
做{
HashMap=newHashMap（）；
map.put（“iRoW”，c.getString（0））；
map.put（“iDate”，c.getString（1））；
map.put（“iFeeders”，c.getString（2））；
列表。添加（地图）；
}而（c.moveToNext（））；
}
c、 close（）；
退货清单；

在文件中调用数据库函数按以下代码检索：

ArrayListretrieveList；

---

retrieveList.get（position.get（“iRow”）

如果我把它改成数组？我需要将c.getString更改为什么？添加了我的集合文本java。感谢您的帮助，您可以改为使用：ArrayList result=new ArrayList（）；然后，在循环中，result.add（c.getString（c.getColumnIndex（“imastis”））；等等。然后返回数组，或者根据需要使用数组中的每个项。我正确地理解了这一点，但现在我的视图数据库中的“setText”出现错误。我需要如何更改ViewLogs Java文件才能查看数据库。我似乎无法纠正电视上的错误；。我应该把ArrayListRetrievelList放在哪里；retrieveList.get（position.get（“iRow”）；？在调用数据库的getData（）方法之后

 result = result  + c.getString(iRow) + " " + c.getString(iDate) + " " + c.getString(iMilkers) + " " +
            c.getString(iFeeders) + " " + c.getString(iMastitis) + " " + c.getString(iBeef) + "\n";

ArrayList<HashMap<String, String>> list;
if (c.moveToFirst()) {
        do {
            HashMap<String, String> map = new HashMap<String, String>();
            map.put("iRoW", c.getString(0));
            map.put("iDate", c.getString(1));
            map.put("iFeeders", c.getString(2));
            list.add(map);
        } while (c.moveToNext());
    }
    c.close();
    return list;