1 /* 2 * Copyright (C) 2008 Esmertec AG. 3 * Copyright (C) 2008 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package com.google.android.mms.util; 19 20 import android.app.ActivityManager; 21 import android.content.ContentResolver; 22 import android.content.ContentValues; 23 import android.content.Context; 24 import android.database.Cursor; 25 import android.database.sqlite.SQLiteException; 26 import android.net.Uri; 27 import android.util.Log; 28 import android.widget.Toast; 29 30 public final class SqliteWrapper { 31 private static final String TAG = "SqliteWrapper"; 32 private static final String SQLITE_EXCEPTION_DETAIL_MESSAGE 33 = "unable to open database file"; 34 35 private SqliteWrapper() { 36 // Forbidden being instantiated. 37 } 38 39 // FIXME: It looks like outInfo.lowMemory does not work well as we expected. 40 // after run command: adb shell fillup -p 100, outInfo.lowMemory is still false. 41 private static boolean isLowMemory(Context context) { 42 if (null == context) { 43 return false; 44 } 45 46 ActivityManager am = (ActivityManager) 47 context.getSystemService(Context.ACTIVITY_SERVICE); 48 ActivityManager.MemoryInfo outInfo = new ActivityManager.MemoryInfo(); 49 am.getMemoryInfo(outInfo); 50 51 return outInfo.lowMemory; 52 } 53 54 // FIXME: need to optimize this method. 55 private static boolean isLowMemory(SQLiteException e) { 56 return e.getMessage().equals(SQLITE_EXCEPTION_DETAIL_MESSAGE); 57 } 58 59 public static void checkSQLiteException(Context context, SQLiteException e) { 60 if (isLowMemory(e)) { 61 Toast.makeText(context, com.android.internal.R.string.low_memory, 62 Toast.LENGTH_SHORT).show(); 63 } else { 64 throw e; 65 } 66 } 67 68 public static Cursor query(Context context, ContentResolver resolver, Uri uri, 69 String[] projection, String selection, String[] selectionArgs, String sortOrder) { 70 try { 71 return resolver.query(uri, projection, selection, selectionArgs, sortOrder); 72 } catch (SQLiteException e) { 73 Log.e(TAG, "Catch a SQLiteException when query: ", e); 74 checkSQLiteException(context, e); 75 return null; 76 } 77 } 78 79 public static boolean requery(Context context, Cursor cursor) { 80 try { 81 return cursor.requery(); 82 } catch (SQLiteException e) { 83 Log.e(TAG, "Catch a SQLiteException when requery: ", e); 84 checkSQLiteException(context, e); 85 return false; 86 } 87 } 88 public static int update(Context context, ContentResolver resolver, Uri uri, 89 ContentValues values, String where, String[] selectionArgs) { 90 try { 91 return resolver.update(uri, values, where, selectionArgs); 92 } catch (SQLiteException e) { 93 Log.e(TAG, "Catch a SQLiteException when update: ", e); 94 checkSQLiteException(context, e); 95 return -1; 96 } 97 } 98 99 public static int delete(Context context, ContentResolver resolver, Uri uri, 100 String where, String[] selectionArgs) { 101 try { 102 return resolver.delete(uri, where, selectionArgs); 103 } catch (SQLiteException e) { 104 Log.e(TAG, "Catch a SQLiteException when delete: ", e); 105 checkSQLiteException(context, e); 106 return -1; 107 } 108 } 109 110 public static Uri insert(Context context, ContentResolver resolver, 111 Uri uri, ContentValues values) { 112 try { 113 return resolver.insert(uri, values); 114 } catch (SQLiteException e) { 115 Log.e(TAG, "Catch a SQLiteException when insert: ", e); 116 checkSQLiteException(context, e); 117 return null; 118 } 119 } 120 } 121
