Hello developer, In this article we will share with you a utils class which will help in the coding in java language. You can also use this in kotlin by converting java code to kotlin code. This Class is made for helping the beginners and save their times. The best part of this class is almost all functions are usable in all android versions. We hope that it will definitely help you. We have also given some examples for using this class. It contains the function of Custom Toast, Custom Toast with icon, Sort Listmap by name, date and other details, Crop Image using intent, checking internet connections, Copy files from input stream, Show keyboard as well as hide keyboard, get X and Y location of a widget view, generate a random number between a minimum and maximum value, get Dip in float, get display width and height in pixels of a device programically, get all keys from a map etc.
package com.mproject.myutills;
import android.app.*;
import android.content.*;
import android.graphics.drawable.*;
import android.net.*;
import android.util.*;
import android.view.*;
import android.view.inputmethod.*;
import android.widget.*;
import java.io.*;
import java.util.*;
public class MyJavaUtils {
public static int TOP = 1;
public static int CENTER = 2;
public static int BOTTOM = 3;
public static void CustomToast(Context _context, String _message, int _textColor, int _textSize, int _bgColor, int _radius, int _gravity) {
Toast _toast = Toast.makeText(_context, _message, Toast.LENGTH_SHORT);
View _view = _toast.getView();
TextView _textView = _view.findViewById(android.R.id.message);
_textView.setTextSize(_textSize);
_textView.setTextColor(_textColor);
_textView.setGravity(Gravity.CENTER);
GradientDrawable _gradientDrawable = new GradientDrawable();
_gradientDrawable.setColor(_bgColor);
_gradientDrawable.setCornerRadius(_radius);
_view.setBackgroundDrawable(_gradientDrawable);
_view.setPadding(15, 10, 15, 10);
_view.setElevation(10);
switch (_gravity) {
case 1:
_toast.setGravity(Gravity.TOP, 0, 150);
break;
case 2:
_toast.setGravity(Gravity.CENTER, 0, 0);
break;
case 3:
_toast.setGravity(Gravity.BOTTOM, 0, 150);
break;
}
_toast.show();
}
public static void sortListMap(final ArrayList<HashMap<String, Object>> listMap, final String key, final boolean isNumber, final boolean ascending) {
Collections.sort(listMap, new Comparator<HashMap<String, Object>>() {
public int compare(HashMap<String, Object> _compareMap1, HashMap<String, Object> _compareMap2) {
if (isNumber) {
int _count1 = Integer.valueOf(_compareMap1.get(key).toString());
int _count2 = Integer.valueOf(_compareMap2.get(key).toString());
if (ascending) {
return _count1 < _count2 ? -1 : _count1 < _count2 ? 1 : 0;
} else {
return _count1 > _count2 ? -1 : _count1 > _count2 ? 1 : 0;
}
} else {
if (ascending) {
return (_compareMap1.get(key).toString()).compareTo(_compareMap2.get(key).toString());
} else {
return (_compareMap2.get(key).toString()).compareTo(_compareMap1.get(key).toString());
}
}
}
});
}
public static void CustomToastWithIcon(Context _context, String _message, int _textColor, int _textSize, int _bgColor, int _radius, int _gravity, int _icon) {
Toast _toast = Toast.makeText(_context, _message, Toast.LENGTH_SHORT);
View _view = _toast.getView();
TextView _textView = (TextView) _view.findViewById(android.R.id.message);
_textView.setTextSize(_textSize);
_textView.setTextColor(_textColor);
_textView.setCompoundDrawablesWithIntrinsicBounds(_icon, 0, 0, 0);
_textView.setGravity(Gravity.CENTER);
_textView.setCompoundDrawablePadding(10);
GradientDrawable _gradientDrawable = new GradientDrawable();
_gradientDrawable.setColor(_bgColor);
_gradientDrawable.setCornerRadius(_radius);
_view.setBackgroundDrawable(_gradientDrawable);
_view.setPadding(10, 10, 10, 10);
_view.setElevation(10);
switch (_gravity) {
case 1:
_toast.setGravity(Gravity.TOP, 0, 150);
break;
case 2:
_toast.setGravity(Gravity.CENTER, 0, 0);
break;
case 3:
_toast.setGravity(Gravity.BOTTOM, 0, 150);
break;
}
_toast.show();
}
public static boolean isConnected(Context _context) {
ConnectivityManager _connectivityManager = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo _activeNetworkInfo = _connectivityManager.getActiveNetworkInfo();
return _activeNetworkInfo != null && _activeNetworkInfo.isConnected();
}
public static void CropImage(Activity _activity, String _path, int _requestCode) {
try {
Intent _intent = new Intent("com.android.camera.action.CROP");
File _file = new File(_path);
Uri _contentUri = Uri.fromFile(_file);
_intent.setDataAndType(_contentUri, "image/*");
_intent.putExtra("crop", "true");
_intent.putExtra("aspectX", 1);
_intent.putExtra("aspectY", 1);
_intent.putExtra("outputX", 280);
_intent.putExtra("outputY", 280);
_intent.putExtra("return-data", false);
_activity.startActivityForResult(_intent, _requestCode);
} catch (ActivityNotFoundException _e) {
Toast.makeText(_activity, "Your device doesn't support the crop action!", Toast.LENGTH_SHORT).show();
}
}
public static String copyFromInputStream(InputStream _inputStream) {
ByteArrayOutputStream _outputStream = new ByteArrayOutputStream();
byte[] _buf = new byte[1024];
int _i;
try {
while ((_i = _inputStream.read(_buf)) != -1){
_outputStream.write(_buf, 0, _i);
}
_outputStream.close();
_inputStream.close();
} catch (IOException _e) {
}
return _outputStream.toString();
}
public static void hideKeyboard(Context _context) {
InputMethodManager _inputMethodManager = (InputMethodManager) _context.getSystemService(Context.INPUT_METHOD_SERVICE);
_inputMethodManager.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
}
public static void showKeyboard(Context _context) {
InputMethodManager _inputMethodManager = (InputMethodManager) _context.getSystemService(Context.INPUT_METHOD_SERVICE);
_inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}
public static void showMessage(Context _context, String _s) {
Toast.makeText(_context, _s, Toast.LENGTH_SHORT).show();
}
public static int getLocationX(View _view) {
int _location[] = new int[2];
_view.getLocationInWindow(_location);
return _location[0];
}
public static int getLocationY(View _view) {
int _location[] = new int[2];
_view.getLocationInWindow(_location);
return _location[1];
}
public static int getRandom(int _min, int _max) {
Random random = new Random();
return random.nextInt(_max - _min + 1) + _min;
}
public static ArrayList<Double> getCheckedItemPositionsToArray(ListView _list) {
ArrayList<Double> _result = new ArrayList<Double>();
SparseBooleanArray _arr = _list.getCheckedItemPositions();
for (int _iIdx = 0; _iIdx < _arr.size(); _iIdx++) {
if (_arr.valueAt(_iIdx))
_result.add((double) _arr.keyAt(_iIdx));
}
return _result;
}
public static float getDip(Context _context, int _input) {
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, _input, _context.getResources().getDisplayMetrics());
}
public static int getDisplayWidthPixels(Context _context) {
return _context.getResources().getDisplayMetrics().widthPixels;
}
public static int getDisplayHeightPixels(Context _context) {
return _context.getResources().getDisplayMetrics().heightPixels;
}
public static void getAllKeysFromMap(Map<String, Object> _map, ArrayList<String> _output) {
if (_output == null) return;
_output.clear();
if (_map == null || _map.size() < 1) return;
for (Map.Entry<String, Object> _entry : _map.entrySet()) {
_output.add(_entry.getKey());
}
}
}For using this util class you must have the spesific permission if the function required a permission before using it. For example if you want to use check Internet connection available or not you must give the Access Network State permission in Androidmanifest.xml file. By the way most of the functions does not need any special permission for using. Here I have given some examples of using this class. So read the uses carefully for using this without getting any error.
Here I have provided some uses this utils class. Please watch this carefully before using it. Here I have given 10 functions examples of the uses of this app.
MyJavaUtils.hideKeyboard(context);
MyJavaUtils.showKeyboard(context);
MyJavaUtils.getLocationX(view);
MyJavaUtils.getLocationY(view);
MyJavaUtils.getRandom(0, 10);
MyJavaUtils.getDisplayHeightPixels(context);
MyJavaUtils.getDisplayWidthPixels(context);
MyJavaUtils.isConnected(context);
MyJavaUtils.getAllKeysFromMap(map);
MyJavaUtils.showMessage(context, "your message");How to use a custom class in Android Studio Java?
For using a custom class in your Android Studio Project, After created a project in Android Studio copy this class and paste in to your package where you make your Activity java files. After paste a class import that class into your Activity or Class where you want to use this this class functions. Now, you can use thease functions.
You can also Download Project Store for getting free projects for Android Studio. Where you will get Android Projects, Java Codes , Xml code, custom libraries and other integrations. This application is also available in the Google Play Store. It is available for Android 8.1 to latest Android Version. The application is completely free and also there is not any in app subscription needed for use this application. You can aslo get Sketchware Projects, Blocks Json files, Local Libraries, imports and 30+ swb files manifest codes etc. This app is also contains Html Codes and many other features. So, Install the Application from Play Store by Searching "SketchwareStore Pro" which is published by STUDY M ONLINE.
Which language is most useful and helpful for making Android Apps
There are many laguages which can be used for making Android Apps. For example Java, Kotlin, Pyton, Html etc.
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