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

you can try as to Default calculator on all android devices:

ArrayList> items =new ArrayList>();

final PackageManager pm = getPackageManager();
List packs = pm.getInstalledPackages(0);  
for (PackageInfo pi : packs) {
if( pi.packageName.toString().toLowerCase().contains("calcul")){
    HashMap map = new HashMap();
    map.put("appName", pi.applicationInfo.loadLabel(pm));
    map.put("packageName", pi.packageName);
    items.add(map);
 }
}

and now you can launch calculator application as:

if(items.size()>=1){
String packageName = (String) items.get(0).get("packageName");
Intent i = pm.getLaunchIntentForPackage(packageName);
if (i != null)
  startActivity(i);
} 
else{
      // Application not found
   }

And for Api >= 15 ,You can use

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