Programmatically change the "Use by default for this action"

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I have the normal 'Phone' dialer and I have new 'Dialer' app. Now if I check the "Use by default for this action" and click on the 'Dialer' app then every time when I press the phone button the 'Dialer' app will be started automatically. But how can I change this in code ?

Where this preference is stored ?

And how is this mapped ? is this is mapped by an android action intent string ?

for example the Intent.ACTION_CALL is paired with some application for example the 'Dialer' app to be the default app that will be started every time the Intent.ACTION_CALL it is raised...

Thanks

You can't change default applications using a app but you can referr via intent to the settings page of an app to set the defaults

Intent i = new Intent(android.provider.Settings.Aplications);
startActivity(i);

or something like this

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Starting from API 21 you can use next intent to ask user to be a default dialer:

    Intent intent = new Intent(TelecomManager.ACTION_CHANGE_DEFAULT_DIALER)
        .putExtra(TelecomManager.EXTRA_CHANGE_DEFAULT_DIALER_PACKAGE_NAME, getPackageName());
    if (intent.resolveActivity(getPackageManager()) != null) {
      startActivityForResult(intent, REQUEST_CODE_SET_DEFAULT_DIALER);
    } else {
      Log.w(getLocalClassName(), "No Intent available to handle action");
    }

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 @RequiresApi(api = Build.VERSION_CODES.M)
    private void chnagedialer() {
        TelecomManager systemService = this.getSystemService(TelecomManager.class);
        if (systemService != null && !systemService.getDefaultDialerPackage().equals("com.android.contacts")) {
            startActivity((new Intent(ACTION_CHANGE_DEFAULT_DIALER)).putExtra(EXTRA_CHANGE_DEFAULT_DIALER_PACKAGE_NAME,"com.android.contacts" ));
        }

    }

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Change can I programmatically change the format of a view , You can change the options of a set view format using hook_views_pre_render. An example of this would be: function  Programmatic definition is - relating to program music. Recent Examples on the Web In order to respond to the new challenges posed to our existing content and programmatic models, WIA will launch a series of virtual adaptations to engage both our members and the larger animation community.

Correct way to change the active Drupal theme programmatically , Drupal 6 solution: You want to make sure you change the global $custom_theme variable fairly early in page execution. global $custom_theme; $custom_theme  To change the collation of an existing database, requires ALTER permission on the database. Using SQL Server Management Studio To set or change the database collation. In Object Explorer, connect to an instance of the SQL Server Database Engine, expand that instance, and then expand Databases.

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Comments
  • FATAL EXCEPTION: main E/AndroidRuntime( 3043): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.provider.Settings.Applications } is thrown
  • Intent i = new Intent(android.provider.Settings.ACTION_ALL_APPS); startActivity(i);
  • No Activity found to handle Intent { act=android.provider.Settings.ACTION_ALL_APPS } am I missing some permission ? have you ever tried this ?