Olá
Está ocorrendo erro na execução, mais precisamente na linha onde tem o comando "intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile ( arquivoFoto ));" Se eu deixar em comentários roda a chamada da startActivity, retirando os comentários ocorre o erro "Agenda has stopped" Open app again
O erro na console é: E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.luigi.agenda, PID: 7651 android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.example.luigi.agenda/files/1523476478708.jpg exposed beyond app through ClipData.Item.getUri() at android.os.StrictMode.onFileUriExposed(StrictMode.java:1799) at android.net.Uri.checkFileUriExposed(Uri.java:2346) at android.content.ClipData.prepareToLeaveProcess(ClipData.java:832) at android.content.Intent.prepareToLeaveProcess(Intent.java:8909) at android.content.Intent.prepareToLeaveProcess(Intent.java:8894) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1517) at android.app.Activity.startActivityForResult(Activity.java:4224) at android.support.v4.app.BaseFragmentActivityApi16.startActivityForResult(BaseFragmentActivityApi16.java:54) at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:67) at android.app.Activity.startActivityForResult(Activity.java:4183) at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:720) at com.example.luigi.agenda.FormularioActivity$1.onClick(FormularioActivity.java:51) at android.view.View.performClick(View.java:5610) at android.view.View$PerformClick.run(View.java:22265) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) Application terminated.