Android Open Source - UnitConverterUltimate-Studio Util

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.physphil.android.unitconverterultimate.util;
/* w w  w  . j av  a  2s  .c o  m*/
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.widget.EditText;
import android.widget.RadioGroup;

import com.physphil.android.unitconverterultimate.R;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;


public class Util {  
  
  //This class contains several common methods which are used repeatedly throughout the app
  
  public static void onFragmentVisible(Activity activity, int fromButtonGroupId, int toButtonGroupId){
    //Convert numbers as soon as fragment is loaded and ready to interact with user
    EditText fromValueView = (EditText) activity.findViewById(R.id.fromValue);
    
    //Remove minus sign as negative numbers are not allowed. US = Android numeric keyboard default locale
    DecimalFormat currentFormat = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US);
    DecimalFormatSymbols currentSymbols = currentFormat.getDecimalFormatSymbols();
    String minus = Character.toString(currentSymbols.getMinusSign());
    String fromValueString = fromValueView.getText().toString();
    
    if(Convert.isStringNumeric(fromValueString)){
      //take absolute value of fromValue in case coming from temperature, which allows negative values
      //listener on change of fromValue will call convert 
      double fromValue = Math.abs(Double.parseDouble(fromValueString));
          
      //Add formatting to remove trailing .0 if number is an integer
      currentFormat.setMaximumFractionDigits(activity.getResources().getInteger(R.integer.fromMaxNoDigits));
      currentFormat.setGroupingUsed(false);
      fromValueView.setText(currentFormat.format(fromValue));
      fromValueView.setSelection(fromValueView.getText().length());
    }
    else if(fromValueString.contains(minus)){
      //Remove minus sign as negative numbers are not allowed. Change of fromValue will trigger listener to call Convert
      fromValueView.setText(fromValueString.replaceAll(minus, ""));
      fromValueView.setSelection(fromValueView.getText().length());
    }
    else{
      //fromValue not changed, so convert as listener will not call it. This handles when input starts with a negative sign or decimal and no leading 0
      Convert.convertValue(activity, fromButtonGroupId, toButtonGroupId);
    }
  }
  
  //Save currently selected unit to shared preferences file
  public static void setButtonState(Activity activity, int fromButtonGroupId, int toButtonGroupId, String fromTag, String toTag){
    //Save state of radio buttons for next use
    RadioGroup fromButtons = (RadioGroup) activity.findViewById(fromButtonGroupId);
    RadioGroup toButtons = (RadioGroup) activity.findViewById(toButtonGroupId);
    String fromIdString = activity.getResources().getResourceName(fromButtons.getCheckedRadioButtonId());
    String toIdString = activity.getResources().getResourceName(toButtons.getCheckedRadioButtonId());
        
    //Save ID string instead of resource ID, as integer ID values can change when new resources are added 
    SharedPreferences preferences = activity.getPreferences(Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = preferences.edit();
    editor.putString(fromTag, fromIdString);
    editor.putString(toTag, toIdString);
    editor.commit();    
  }
  
  //Restore previously selected unit from shared preferences file
  public static int getButtonState(Activity activity, String buttonTag){
    int checkedId = 0;
    
    //Get checked radio button
    SharedPreferences preferences = activity.getPreferences(Context.MODE_PRIVATE);
    String checkedIdString = preferences.getString(buttonTag, null);
    
    //Only restore previous checked state if the saved values exist
    if (checkedIdString != null){
      checkedId = activity.getResources().getIdentifier(checkedIdString, "string", activity.getPackageName());
    }
    
    return checkedId;
  }
  
  //Add onCheckChanged listeners to the From/To radio button groups
  public static void addCheckChangedListeners(Activity activity, int fromRadioGroupId, int toRadioGroupId, boolean isTemperature){
    
    RadioGroup fromButtons = (RadioGroup) activity.findViewById(fromRadioGroupId);
    fromButtons.setOnCheckedChangeListener(new ChangeUnitListener(activity, true, isTemperature));
    
    RadioGroup toButtons = (RadioGroup) activity.findViewById(toRadioGroupId);
    toButtons.setOnCheckedChangeListener(new ChangeUnitListener(activity, false, isTemperature));
  }
  
  public static int getComplimentaryId(int radioGroupId){
    int complimentaryId = 0;
    
    if (radioGroupId == R.id.radioFromArea) {
      complimentaryId = R.id.radioToArea;
    } 
    else if (radioGroupId == R.id.radioFromCooking) {
      complimentaryId = R.id.radioToCooking;
    } 
    else if (radioGroupId == R.id.radioFromEnergy) {
      complimentaryId = R.id.radioToEnergy;
    } 
    else if (radioGroupId == R.id.radioFromFuel) {
      complimentaryId = R.id.radioToFuel;
    } 
    else if (radioGroupId == R.id.radioFromLength) {
      complimentaryId = R.id.radioToLength;
    }
    else if (radioGroupId == R.id.radioFromMass) {
      complimentaryId = R.id.radioToMass;
    }
    else if (radioGroupId == R.id.radioFromPower) {
      complimentaryId = R.id.radioToPower;
    }
    else if (radioGroupId == R.id.radioFromPressure) {
      complimentaryId = R.id.radioToPressure;
    }
    else if (radioGroupId == R.id.radioFromSpeed) {
      complimentaryId = R.id.radioToSpeed;
    }
    else if (radioGroupId == R.id.radioFromStorage) {
      complimentaryId = R.id.radioToStorage;
    }
    else if (radioGroupId == R.id.radioFromTemp) {
      complimentaryId = R.id.radioToTemp;
    }
    else if (radioGroupId == R.id.radioFromTime) {
      complimentaryId = R.id.radioToTime;
    }
        else if (radioGroupId == R.id.radioFromTorque) {
            complimentaryId = R.id.radioToTorque;
        }
        else if (radioGroupId == R.id.radioFromVolume) {
            complimentaryId = R.id.radioToVolume;
        }
    else if (radioGroupId == R.id.radioToArea) {
      complimentaryId = R.id.radioFromArea;
    }
    else if (radioGroupId == R.id.radioToCooking) {
      complimentaryId = R.id.radioFromCooking;
    }
    else if (radioGroupId == R.id.radioToEnergy) {
      complimentaryId = R.id.radioFromEnergy;
    } 
    else if (radioGroupId == R.id.radioToFuel) {
      complimentaryId = R.id.radioFromFuel;
    }
    else if (radioGroupId == R.id.radioToLength) {
      complimentaryId = R.id.radioFromLength;
    }
    else if (radioGroupId == R.id.radioToMass) {
      complimentaryId = R.id.radioFromMass;
    }
    else if (radioGroupId == R.id.radioToPower) {
      complimentaryId = R.id.radioFromPower;
    }
    else if (radioGroupId == R.id.radioToPressure) {
      complimentaryId = R.id.radioFromPressure;
    }
    else if (radioGroupId == R.id.radioToSpeed) {
      complimentaryId = R.id.radioFromSpeed;
    }
    else if (radioGroupId == R.id.radioToStorage) {
      complimentaryId = R.id.radioFromStorage;
    } 
    else if (radioGroupId == R.id.radioToTemp) {
      complimentaryId = R.id.radioFromTemp;
    } 
    else if (radioGroupId == R.id.radioToTime) {
      complimentaryId = R.id.radioFromTime;
    }
        else if (radioGroupId == R.id.radioToTorque) {
            complimentaryId = R.id.radioFromTorque;
        }
        else if (radioGroupId == R.id.radioToVolume) {
            complimentaryId = R.id.radioFromVolume;
        }
    
    return complimentaryId;
  }

}

Java Source Code List

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