Android：データベースを照会するときにキャッチされないハンドラの例外

Question

ユーザー入力に基づいてデータベースを照会しようとしていますが、この例外が発生します。

public ArrayList<ArrayList<String>> getAnswer(int questionId, String startDate, String endDate) 
{ 
    String query = "SELECT " + HealthyDroidQuizHelper.COLUMN_ANSWER + ", " 
    + HealthyDroidQuizHelper.COLUMN_DATETIME + " FROM " + HealthyDroidQuizHelper.TABLE_ASSOCIATION 
    + " WHERE " + HealthyDroidQuizHelper.COLUMN_QUESTION_ID + " = " + questionId + " AND " 
    + HealthyDroidQuizHelper.COLUMN_DATETIME + " BETWEEN " + startDate + " AND " + endDate; 

    ArrayList<ArrayList<String>> totalResults = new ArrayList<ArrayList<String>>(); 
    ArrayList<String> QuizResults = new ArrayList<String>(); 
    String ans, currDate, oldDate = null; 

    Cursor cursor = database.rawQuery(query, null); 
    cursor.moveToFirst(); 
    oldDate = cursor.getString(cursor.getColumnIndex(HealthyDroidQuizHelper.COLUMN_DATETIME)); 
    QuizResults.add(oldDate); 
    while(!cursor.isAfterLast()) 
    { 
     currDate = cursor.getString(cursor.getColumnIndex(HealthyDroidQuizHelper.COLUMN_DATETIME)); 
     if(!oldDate.equalsIgnoreCase(currDate)) 
     { 
      QuizResults.add(currDate); 
      oldDate = currDate; 
     } 

     ans = cursor.getString(cursor.getColumnIndex(HealthyDroidQuizHelper.COLUMN_ANSWER)); 
     QuizResults.add(ans); 
     cursor.moveToNext(); 
    } 

    totalResults.add(QuizResults); 
    return totalResults; 
} 

：これは、データベースを照会するために呼び出されるメソッドである

public void query() 
{ 
    quesNum = (EditText)findViewById(R.id.idBox); 
    startingDate = (EditText)findViewById(R.id.startDate); 
    endingDate = (EditText)findViewById(R.id.endDate); 
    String num, start, end; 

    num = quesNum.getText().toString(); 
    start = startingDate.getText().toString(); 
    end = endingDate.getText().toString(); 
    ArrayList<ArrayList<String>> result = datasource.getAnswer(Integer.parseInt(num), start, end); 
    textview.setText(result.get(0).toString()); 
} 


public void onClick(View view) 
{ 

    switch (view.getId()) 
    { 
     case R.id.add: 
       changeText(); 
       break; 
     case R.id.query: 
      query(); 
      break;    
    } 
} 

：これは、アクティビティのコードは

private static String CREATE_TABLE_ASSOCIATION = "create table "  
     + TABLE_ASSOCIATION + "(" + COLUMN_QUESTION_ID + " integer not null, " 
     + COLUMN_ANSWER + " text not null, " + COLUMN_DATETIME + " text not null, " 
     + "FOREIGN KEY (" + COLUMN_QUESTION_ID + ") REFERENCES " + TABLE_QUESTION 
     + "(" + COLUMN_ID + "), FOREIGN KEY (" + COLUMN_ANSWER + ") " 
     + "REFERENCES "+ TABLE_ANSWER + "(" + COLUMN_ANSWER + "), " 
     + "FOREIGN KEY (" + COLUMN_DATETIME + ") REFERENCES " + TABLE_ANSWER 
     + "(" + COLUMN_DATETIME + ") PRIMARY KEY (" + COLUMN_QUESTION_ID + "," + COLUMN_DATETIME + "));"; 

ある：

これは、テーブルのスキーマであります

最後に、これはLogcat出力です。

05-09 19:07:32.897: D/AndroidRuntime(1229): Shutting down VM 
05-09 19:07:32.897: W/dalvikvm(1229): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 
05-09 19:07:32.897: E/AndroidRuntime(1229): Uncaught handler: thread main exiting due to uncaught exception 
05-09 19:07:32.907: E/AndroidRuntime(1229): java.lang.IllegalStateException: Could not execute method of the activity 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.View$1.onClick(View.java:2031) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.View.performClick(View.java:2364) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.View.onTouchEvent(View.java:4179) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.widget.TextView.onTouchEvent(TextView.java:6541) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.View.dispatchTouchEvent(View.java:3709) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.app.Activity.dispatchTouchEvent(Activity.java:2061) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1691) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.os.Handler.dispatchMessage(Handler.java:99) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.os.Looper.loop(Looper.java:123) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at java.lang.reflect.Method.invoke(Method.java:521) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at dalvik.system.NativeStart.main(Native Method) 
05-09 19:07:32.907: E/AndroidRuntime(1229): Caused by: java.lang.reflect.InvocationTargetException 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at ca.bcit.comp4900.TestDatabaseActivity.onClick(TestDatabaseActivity.java:74) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at java.lang.reflect.Method.invoke(Method.java:521) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at android.view.View$1.onClick(View.java:2026) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  ... 22 more 
05-09 19:07:32.907: E/AndroidRuntime(1229): Caused by: java.lang.NullPointerException 
05-09 19:07:32.907: E/AndroidRuntime(1229):  at ca.bcit.comp4900.TestDatabaseActivity.query(TestDatabaseActivity.java:60) 
05-09 19:07:32.907: E/AndroidRuntime(1229):  ... 26 more 
05-09 19:07:32.937: I/dalvikvm(1229): threadid=7: reacting to signal 3 
05-09 19:07:32.947: I/dalvikvm(1229): Wrote stack trace to '/data/anr/traces.txt' 

ありがとうございます！ここで

Answer 1

エラーです：。

Caused by: android.database.sqlite.SQLiteException: near "AND": syntax error: , while compiling: SELECT answer, dateTime FROM association WHERE questionId = 1 AND dateTime BETWEEN AND

あなたの句は言う "と "AND" BETWEEN」... dateTimeには「キーワードの間で欠落しているパラメータがある間..."

だから、startDateのように見える（そしておそらくもendDate）getAnswer()で空の文字列です。