How to call android calculator on my app for all phones

Question

  public static final String CALCULATOR_PACKAGE =\"com.android.calculator2\";
  public static final String CALCULATOR_CLASS =\"com.android.calculator2.Calculator\";
         


        

Answer 1

Well this is a Modified Answer of @ρяσѕρєя K becouse it works fine in samsung mobiles and only packages have "calc" but not all mobiles like HTC AND LENOVO ETC

And for Api >= 15 ,You can use BUT !!!

    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_APP_CALCULATOR);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

THIS MAY CAN CAUSE ERROR LIKE THIS

android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.MAIN cat=[android.intent.category.APP_CALCULATOR] flg=0x10000000 }

SO LETS TAKE A LOOK AT THIS

LOAD all apps to Array

    // Declare universal if you want Access any where from scope


ArrayList> items;
    PackageManager pm ;    
List packs;

    // initialise From Oncreate if you want
    items =new  ArrayList>(); 
    pm = getPackageManager();
    packs = pm.getInstalledPackages(0);  
        for (PackageInfo pi : packs)
 {
            HashMap map = new HashMap();
            map.put("appName", pi.applicationInfo.loadLabel(pm));
            map.put("packageName", pi.packageName);
            items.add(map); 
 }

THIS IS TRICK PART We are Traversing through all Apps to get App Named or Matches "Calculator"

public void opencalculator(){
  int d=0;
  if(items.size()>=1){
  int j=0;
 for(j=0;j

CALL OPENCALCULATOR

opencalculator();