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我有一個方法巫婆約400插入到SQLite數據庫，這需要幾秒鐘。我有紅色的周圍插入與beginTransaction（）和endTransaction（）會優化它很多。然而，我不明白如何做到這一點，現在我試圖做到這一點的方式只會導致根本沒有插入任何東西。請幫忙。我如何使用我的數據庫設置交易Android
package com.example.oscar.strengthapp;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteStatement;
import java.util.ArrayList;
/**
* Created by Oscar on 2016-01-09.
*/
public class WorkoutDB extends AbstractWorkoutDB{
private static final WorkoutDB ourInstance = new WorkoutDB();
private WorkoutDB() {}
public static WorkoutDB getInstance() {
return ourInstance;
}
public void beginTransaction(){
database.beginTransaction();
}
public void endTransaction(){
database.endTransaction();
}
public void insertExercise(int workoutID, String name, double weight, int sets, int reps){
ContentValues values = new ContentValues();
values.put(KEY_WORKOUT, workoutID);
values.put(KEY_NAME, name);
values.put(KEY_REPS, reps);
values.put(KEY_SETS, sets);
values.put(KEY_WEIGHT, weight);
long rowId = database.insert(DB_TABLE_WORK, null, values);
}
public boolean updateExercise(Exercise exercise){
ContentValues values = new ContentValues();
values.put(KEY_WORKOUT, exercise.getWorkoutID());
values.put(KEY_NAME, exercise.getName());
values.put(KEY_REPS, exercise.getReps());
values.put(KEY_SETS, exercise.getSets());
values.put(KEY_WEIGHT, exercise.getWeight());
return database.update(DB_TABLE_WORK, values, KEY_EXERCISE_ID +
"=" + exercise.getExerciseID(), null) > 0;
}
public boolean deleteExercise(Exercise exercise){
return database.delete(DB_TABLE_WORK, KEY_EXERCISE_ID +
"=" + exercise.getExerciseID(), null) >0;
}
public void clearTable(){
database.delete(DB_TABLE_WORK, null, null);
}
public ArrayList<Exercise> getAllExercises(){
Cursor cr = getAllExercisesCursor();
return makeExerciseListFromCursor(cr);
}
public ArrayList<Exercise> getWorkout(int id){
Cursor cr = getWorkoutCursor(id);
return makeExerciseListFromCursor(cr);
}
private ArrayList<Exercise> makeExerciseListFromCursor(Cursor cr){
ArrayList<Exercise> exercises = new ArrayList<Exercise>();
if(cr != null && cr.moveToFirst())
do{
exercises.add(new Exercise(cr.getLong(0), cr.getInt(1), cr.getString(2),
cr.getDouble(3), cr.getInt(4), cr.getInt(5)));
}while (cr.moveToNext());
return exercises;
}
protected void createTestData() {
System.out.println("Inserting Test Data");
WorkoutDB.getInstance().insertExercise(1, "Bench", 0.75, 5, 5);
WorkoutDB.getInstance().insertExercise(1, "Squat", 0.75, 5, 5);
WorkoutDB.getInstance().insertExercise(2, "Deadlift", 0.8, 3, 2);
WorkoutDB.getInstance().insertExercise(2, "Squat", 0.75, 5, 5);
WorkoutDB.getInstance().insertExercise(3, "Bench", 0.85, 3, 3);
WorkoutDB.getInstance().insertExercise(3, "Squat", 0.85, 3, 3);
}
}
。
package com.example.oscar.strengthapp;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
/**
* Created by Oscar on 2016-01-09.
*/
public abstract class AbstractWorkoutDB {
public static final String DB_TABLE_WORK = "Work";
public static final String KEY_EXERCISE_ID = "exerciseId";
public static final String KEY_WORKOUT = "workoutId";
public static final String KEY_NAME = "name";
public static final String KEY_WEIGHT = "weight";
public static final String KEY_REPS = "reps";
public static final String KEY_SETS = "sets";
public static final String TAG = "WorkoutDB";
public static final String DB_NAME = "Workouts";
protected SQLiteDatabase database;
private static final String [] columns = {
KEY_EXERCISE_ID,
KEY_WORKOUT,
KEY_NAME,
KEY_WEIGHT,
KEY_REPS,
KEY_SETS};
private static final int DB_VERSION = 1;
private MyDbHelper mDbHelper;
private Context context;
private static final String DB_CREATE_WORK = "create table " +
DB_TABLE_WORK + " (" +
KEY_EXERCISE_ID + " INTEGER PRIMARY KEY, " +
KEY_WORKOUT + " INTEGER, " +
KEY_NAME + " TEXT, " +
KEY_WEIGHT + " DOUBLE, " +
KEY_SETS + " INTEGER, " +
KEY_REPS + " INTEGER);";
protected abstract void createTestData(); // must be implemented
public void open(boolean writable, Context ctx) throws SQLException
{
this.context = ctx;
mDbHelper = new MyDbHelper(context);
if (writable)
{
database = mDbHelper.getWritableDatabase();
if(mDbHelper.isFirstTime())
System.out.println("is first time");
//createTestData();
}
else
database = mDbHelper.getReadableDatabase();
}
public void close()
{
mDbHelper.close();
}
protected Cursor getAllExercisesCursor()
{ // select * from song
return database.query(DB_TABLE_WORK, columns, null, null, null, null, null);
}
protected Cursor getWorkoutCursor(int id){
return database.query(
DB_TABLE_WORK,
columns,
KEY_WORKOUT + "=?",
new String[]{String.valueOf(id)},
null, null, null, null);
}
protected static class MyDbHelper extends SQLiteOpenHelper // Local help class
{
private boolean firstTime = false;
MyDbHelper(Context context)
{
super(context, DB_NAME, null, DB_VERSION);
}
public void onCreate(SQLiteDatabase sqldb) // called if needed
{
sqldb.execSQL(DB_CREATE_WORK);
firstTime = true;
}
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE_WORK);
onCreate(db);
}
public boolean isFirstTime()
{
return firstTime;
}
}
}
，這就是我的方法看起來像女巫做了一堆插入
public void initiate(String program, int length){
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("CURRENT_WORKOUT", 1);
editor.putString("CURRENT_PROGRAM", program);
editor.putInt("CURRENT_LENGTH", length);
editor.apply();
WorkoutDB.getInstance().clearTable();
}
public void juggernaut(){
initiate("Juggernaut Method", 112);
WorkoutDB.getInstance().beginTransaction();
WorkoutDB.getInstance().insertExercise(1, "Squat", 0.6, 5, 10);
WorkoutDB.getInstance().insertExercise(1, "RDL", 0, 3, 12);
WorkoutDB.getInstance().insertExercise(1, "Lunges", 0, 3, 20);
WorkoutDB.getInstance().insertExercise(1, "Plank", 0, 3, 30);
WorkoutDB.getInstance().insertExercise(2, "REST", 0, 0, 0);
//and 400more of the same
WorkoutDB.getInstance().endTransaction();
}
非常感謝你setTransactionSucessful（）是什麼失蹤！ –