How to Open Calculator App from Another App using Intent

How to call Android calculator on my app for all phones

Only for HTC Mobile

App: Calculator
Version: 7.0 (24)
Languages: 72
Package: com.android.calculator2

  public static final String CALCULATOR_PACKAGE ="com.android.calculator2";
  public static final String CALCULATOR_CLASS ="com.android.calculator2.Calculator";
  Intent intent = new Intent();

    intent.setAction(Intent.ACTION_MAIN);
         intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setComponent(new ComponentName(
         CALCULATOR_PACKAGE,
         CALCULATOR_CLASS));

  public static final String CALCULATOR_PACKAGE ="com.sec.android.app.popupcalculator";
  public static final String CALCULATOR_CLASS ="com.sec.android.app.popupcalculator.Calculator";

But If you need a code that works for all android devices then below code is for you. Here is the example code:

you can try as to Default calculator on all android devices and this code will work perfectly for all android devices:

ArrayList<HashMap<String,Object>> items =new ArrayList<HashMap<String,Object>>();

final PackageManager pm = getPackageManager();
List<PackageInfo> packs = pm.getInstalledPackages(0);  
for (PackageInfo pi : packs) {
if( pi.packageName.toString().toLowerCase().contains("calcul")){
    HashMap<String, Object> map = new HashMap<String, Object>();
    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);

Full Code:

ArrayList<HashMap<String,Object>> items =new ArrayList<HashMap<String,Object>>();

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

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
    Toast.makeText(MainActivity.this, "Calculator not installed", Toast.LENGTH_SHORT).show();
}

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

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