73 lines
2.1 KiB
Java
73 lines
2.1 KiB
Java
/*
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* Copyright 2016 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.util;
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import android.database.Cursor;
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import android.database.SQLException;
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import android.database.sqlite.SQLiteDatabase;
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import java.util.ArrayList;
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import java.util.List;
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public class SqlUtils {
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public static void exeSQLSafely(SQLiteDatabase db, String sql) {
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try {
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db.execSQL(sql);
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} catch (SQLException e) {
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// Ignore
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}
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}
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public static void dropTable(SQLiteDatabase db, String tableName) {
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exeSQLSafely(db, "DROP TABLE IF EXISTS " + tableName);
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}
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public static void dropAllTable(SQLiteDatabase db) {
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List<String> tables = new ArrayList<String>();
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Cursor cursor = db.rawQuery("SELECT * FROM sqlite_master WHERE type='table';", null);
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cursor.moveToFirst();
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while (!cursor.isAfterLast()) {
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String tableName = cursor.getString(1);
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if (!tableName.equals("android_metadata") &&
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!tableName.equals("sqlite_sequence"))
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tables.add(tableName);
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cursor.moveToNext();
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}
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cursor.close();
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for(String tableName : tables) {
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dropTable(db, tableName);
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}
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}
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public static String sqlEscapeString(String value) {
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StringBuilder sb = new StringBuilder();
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int length = value.length();
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for (int i = 0; i < length; i++) {
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char c = value.charAt(i);
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if (c == '\'') {
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sb.append('\'');
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}
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sb.append(c);
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}
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return sb.toString();
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}
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}
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