/*
* Copyright 2014 KC Ochibili
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* The "‚‗‚" character is not a comma, it is the SINGLE LOW-9 QUOTATION MARK unicode 201A
* and unicode 2017 that are used for separating the items in a list.
*/
package probus.malikkurosaki.probussystem;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;
//import com.google.gson.Gson;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.util.Log;
public class Helper_db {
private SharedPreferences preferences;
private String DEFAULT_APP_IMAGEDATA_DIRECTORY;
private String lastImagePath = "";
public Helper_db(Context appContext) {
preferences = PreferenceManager.getDefaultSharedPreferences(appContext);
}
/**
* Decodes the Bitmap from 'path' and returns it
* @param path image path
* @return the Bitmap from 'path'
*/
public Bitmap getImage(String path) {
Bitmap bitmapFromPath = null;
try {
bitmapFromPath = BitmapFactory.decodeFile(path);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return bitmapFromPath;
}
/**
* Returns the String path of the last saved image
* @return string path of the last saved image
*/
public String getSavedImagePath() {
return lastImagePath;
}
/**
* Saves 'theBitmap' into folder 'theFolder' with the name 'theImageName'
* @param theFolder the folder path dir you want to save it to e.g "DropBox/WorkImages"
* @param theImageName the name you want to assign to the image file e.g "MeAtLunch.png"
* @param theBitmap the image you want to save as a Bitmap
* @return returns the full path(file system address) of the saved image
*/
public String putImage(String theFolder, String theImageName, Bitmap theBitmap) {
if (theFolder == null || theImageName == null || theBitmap == null)
return null;
this.DEFAULT_APP_IMAGEDATA_DIRECTORY = theFolder;
String mFullPath = setupFullPath(theImageName);
if (!mFullPath.equals("")) {
lastImagePath = mFullPath;
saveBitmap(mFullPath, theBitmap);
}
return mFullPath;
}
/**
* Saves 'theBitmap' into 'fullPath'
* @param fullPath full path of the image file e.g. "Images/MeAtLunch.png"
* @param theBitmap the image you want to save as a Bitmap
* @return true if image was saved, false otherwise
*/
public boolean putImageWithFullPath(String fullPath, Bitmap theBitmap) {
return !(fullPath == null || theBitmap == null) && saveBitmap(fullPath, theBitmap);
}
/**
* Creates the path for the image with name 'imageName' in DEFAULT_APP.. directory
* @param imageName name of the image
* @return the full path of the image. If it failed to create directory, return empty string
*/
private String setupFullPath(String imageName) {
File mFolder = new File(Environment.getExternalStorageDirectory(), DEFAULT_APP_IMAGEDATA_DIRECTORY);
if (isExternalStorageReadable() && isExternalStorageWritable() && !mFolder.exists()) {
if (!mFolder.mkdirs()) {
Log.e("ERROR", "Failed to setup folder");
return "";
}
}
return mFolder.getPath() + '/' + imageName;
}
/**
* Saves the Bitmap as a PNG file at path 'fullPath'
* @param fullPath path of the image file
* @param bitmap the image as a Bitmap
* @return true if it successfully saved, false otherwise
*/
private boolean saveBitmap(String fullPath, Bitmap bitmap) {
if (fullPath == null || bitmap == null)
return false;
boolean fileCreated = false;
boolean bitmapCompressed = false;
boolean streamClosed = false;
File imageFile = new File(fullPath);
if (imageFile.exists())
if (!imageFile.delete())
return false;
try {
fileCreated = imageFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
FileOutputStream out = null;
try {
out = new FileOutputStream(imageFile);
bitmapCompressed = bitmap.compress(CompressFormat.PNG, 100, out);
} catch (Exception e) {
e.printStackTrace();
bitmapCompressed = false;
} finally {
if (out != null) {
try {
out.flush();
out.close();
streamClosed = true;
} catch (IOException e) {
e.printStackTrace();
streamClosed = false;
}
}
}
return (fileCreated && bitmapCompressed && streamClosed);
}
public int getInt(String key) {
return preferences.getInt(key, 0);
}
/**
* Get parsed ArrayList of Integers from SharedPreferences at 'key'
* @param key SharedPreferences key
* @return ArrayList of Integers
*/
public ArrayList<Integer> getListInt(String key) {
String[] myList = TextUtils.split(preferences.getString(key, ""), "‚‗‚");
ArrayList<String> arrayToList = new ArrayList<String>(Arrays.asList(myList));
ArrayList<Integer> newList = new ArrayList<Integer>();
for (String item : arrayToList)
newList.add(Integer.parseInt(item));
return newList;
}
/**
* Get long value from SharedPreferences at 'key'. If key not found, return 'defaultValue'
* @param key SharedPreferences key
* @param defaultValue long value returned if key was not found
* @return long value at 'key' or 'defaultValue' if key not found
*/
public long getLong(String key, long defaultValue) {
return preferences.getLong(key, defaultValue);
}
public float getFloat(String key) {
return preferences.getFloat(key, 0);
}
/**
* Get double value from SharedPreferences at 'key'. If exception thrown, return 'defaultValue'
* @param key SharedPreferences key
* @param defaultValue double value returned if exception is thrown
* @return double value at 'key' or 'defaultValue' if exception is thrown
*/
public double getDouble(String key, double defaultValue) {
String number = getString(key);
try {
return Double.parseDouble(number);
} catch (NumberFormatException e) {
return defaultValue;
}
}
/**
* Get parsed ArrayList of Double from SharedPreferences at 'key'
* @param key SharedPreferences key
* @return ArrayList of Double
*/
public ArrayList<Double> getListDouble(String key) {
String[] myList = TextUtils.split(preferences.getString(key, ""), "‚‗‚");
ArrayList<String> arrayToList = new ArrayList<String>(Arrays.asList(myList));
ArrayList<Double> newList = new ArrayList<Double>();
for (String item : arrayToList)
newList.add(Double.parseDouble(item));
return newList;
}
/**
* Get parsed ArrayList of Integers from SharedPreferences at 'key'
* @param key SharedPreferences key
* @return ArrayList of Longs
*/
public ArrayList<Long> getListLong(String key) {
String[] myList = TextUtils.split(preferences.getString(key, ""), "‚‗‚");
ArrayList<String> arrayToList = new ArrayList<String>(Arrays.asList(myList));
ArrayList<Long> newList = new ArrayList<Long>();
for (String item : arrayToList)
newList.add(Long.parseLong(item));
return newList;
}
/**
* Get String value from SharedPreferences at 'key'. If key not found, return ""
* @param key SharedPreferences key
* @return String value at 'key' or "" (empty String) if key not found
*/
public String getString(String key) {
return preferences.getString(key, "");
}
/**
* Get parsed ArrayList of String from SharedPreferences at 'key'
* @param key SharedPreferences key
* @return ArrayList of String
*/
public ArrayList<String> getListString(String key) {
return new ArrayList<String>(Arrays.asList(TextUtils.split(preferences.getString(key, ""), "‚‗‚")));
}
public boolean getBoolean(String key) {
return preferences.getBoolean(key, false);
}
/**
* Get parsed ArrayList of Boolean from SharedPreferences at 'key'
* @param key SharedPreferences key
* @return ArrayList of Boolean
*/
public ArrayList<Boolean> getListBoolean(String key) {
ArrayList<String> myList = getListString(key);
ArrayList<Boolean> newList = new ArrayList<Boolean>();
for (String item : myList) {
if (item.equals("true")) {
newList.add(true);
} else {
newList.add(false);
}
}
return newList;
}
// public ArrayList<Object> getListObject(String key, Class<?> mClass){
// Gson gson = new Gson();
//
// ArrayList<String> objStrings = getListString(key);
// ArrayList<Object> objects = new ArrayList<Object>();
//
// for(String jObjString : objStrings){
// Object value = gson.fromJson(jObjString, mClass);
// objects.add(value);
// }
// return objects;
// }
// public <T> T getObject(String key, Class<T> classOfT){
//
// String json = getString(key);
// Object value = new Gson().fromJson(json, classOfT);
// if (value == null)
// throw new NullPointerException();
// return (T)value;
// }
// Put methods
/**
* Put int value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value int value to be added
*/
public void putInt(String key, int value) {
checkForNullKey(key);
preferences.edit().putInt(key, value).apply();
}
/**
* Put ArrayList of Integer into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param intList ArrayList of Integer to be added
*/
public void putListInt(String key, ArrayList<Integer> intList) {
checkForNullKey(key);
Integer[] myIntList = intList.toArray(new Integer[intList.size()]);
preferences.edit().putString(key, TextUtils.join("‚‗‚", myIntList)).apply();
}
/**
* Put long value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value long value to be added
*/
public void putLong(String key, long value) {
checkForNullKey(key);
preferences.edit().putLong(key, value).apply();
}
/**
* Put ArrayList of Long into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param longList ArrayList of Long to be added
*/
public void putListLong(String key, ArrayList<Long> longList) {
checkForNullKey(key);
Long[] myLongList = longList.toArray(new Long[longList.size()]);
preferences.edit().putString(key, TextUtils.join("‚‗‚", myLongList)).apply();
}
/**
* Put float value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value float value to be added
*/
public void putFloat(String key, float value) {
checkForNullKey(key);
preferences.edit().putFloat(key, value).apply();
}
/**
* Put double value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value double value to be added
*/
public void putDouble(String key, double value) {
checkForNullKey(key);
putString(key, String.valueOf(value));
}
/**
* Put ArrayList of Double into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param doubleList ArrayList of Double to be added
*/
public void putListDouble(String key, ArrayList<Double> doubleList) {
checkForNullKey(key);
Double[] myDoubleList = doubleList.toArray(new Double[doubleList.size()]);
preferences.edit().putString(key, TextUtils.join("‚‗‚", myDoubleList)).apply();
}
/**
* Put String value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value String value to be added
*/
public void putString(String key, String value) {
checkForNullKey(key); checkForNullValue(value);
preferences.edit().putString(key, value).apply();
}
/**
* Put ArrayList of String into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param stringList ArrayList of String to be added
*/
public void putListString(String key, ArrayList<String> stringList) {
checkForNullKey(key);
String[] myStringList = stringList.toArray(new String[stringList.size()]);
preferences.edit().putString(key, TextUtils.join("‚‗‚", myStringList)).apply();
}
/**
* Put boolean value into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param value boolean value to be added
*/
public void putBoolean(String key, boolean value) {
checkForNullKey(key);
preferences.edit().putBoolean(key, value).apply();
}
/**
* Put ArrayList of Boolean into SharedPreferences with 'key' and save
* @param key SharedPreferences key
* @param boolList ArrayList of Boolean to be added
*/
public void putListBoolean(String key, ArrayList<Boolean> boolList) {
checkForNullKey(key);
ArrayList<String> newList = new ArrayList<String>();
for (Boolean item : boolList) {
if (item) {
newList.add("true");
} else {
newList.add("false");
}
}
putListString(key, newList);
}
public void remove(String key) {
preferences.edit().remove(key).apply();
}
public boolean deleteImage(String path) {
return new File(path).delete();
}
/**
* Clear SharedPreferences (remove everything)
*/
public void clear() {
preferences.edit().clear().apply();
}
/**
* Retrieve all values from SharedPreferences. Do not modify collection return by method
* @return a Map representing a list of key/value pairs from SharedPreferences
*/
public Map<String, ?> getAll() {
return preferences.getAll();
}
/**
* Register SharedPreferences change listener
* @param listener listener object of OnSharedPreferenceChangeListener
*/
public void registerOnSharedPreferenceChangeListener(
SharedPreferences.OnSharedPreferenceChangeListener listener) {
preferences.registerOnSharedPreferenceChangeListener(listener);
}
public void unregisterOnSharedPreferenceChangeListener(
SharedPreferences.OnSharedPreferenceChangeListener listener) {
preferences.unregisterOnSharedPreferenceChangeListener(listener);
}
public static boolean isExternalStorageWritable() {
return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
}
public static boolean isExternalStorageReadable() {
String state = Environment.getExternalStorageState();
return Environment.MEDIA_MOUNTED.equals(state) ||
Environment.MEDIA_MOUNTED_READ_ONLY.equals(state);
}
public void checkForNullKey(String key){
if (key == null){
throw new NullPointerException();
}
}
public void checkForNullValue(String value){
if (value == null){
throw new NullPointerException();
}
}
}
Created
October 1, 2019 07:05
-
-
Save malikkurosaki/500180072ecc5acc25127983f1f587b6 to your computer and use it in GitHub Desktop.
simple database
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment