別のアプリケーションを開く

private void start()
{
    Intent intent = new Intent();
    try
    {
        intent.setClassName(getApplicationContext().createPackageContext(
            "com.example",
        android.content.Context.CONTEXT_IGNORE_SECURITY),
            "com.example.ExampleActivity");
    }
    catch (NameNotFoundException e)
    {
        e.printStackTrace();
    }
    startActivity(intent);
}