comment définir les options de visibilité de android.widget de.textview

FC avait des problèmes avec cette

private TextView msg, NameOut, DateOut;
msg = (TextView) findViewById(R.id.txtviewOut) ;

en bas de la ligne... (problème réside ici)

msg.setVisibility(View.INVISIBLE);//set visibility to false on create

comment puis-je définir la visibilité de cette TextView (msg) à false lorsque l'application démarre?

Mise à JOUR APRÈS #1 Réponse EDIT

bon voici le code:

fragment_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment">
<EditText
android:id="@+id/textenter"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_below="@+id/lbledt1"
android:layout_alignParentLeft="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter Name"
android:id="@+id/lbledt1"
android:layout_marginTop="26dp"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter your date of birth (e.g. xx July 19xx)"
android:id="@+id/textView"
android:layout_below="@+id/textenter"
android:layout_centerHorizontal="true"
android:layout_marginTop="57dp" />
<EditText
android:id="@+id/editText"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Press this button"
android:id="@+id/button"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="You have been awesome since"
android:id="@+id/txtviewOut"
android:layout_marginTop="86dp"
android:textIsSelectable="false"
android:layout_below="@+id/button"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/txtoutName"
android:textIsSelectable="false"
android:layout_alignBottom="@+id/txtviewOut"
android:layout_centerHorizontal="true"
android:layout_marginBottom="41dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/txtOutDate"
android:layout_marginTop="28dp"
android:textIsSelectable="false"
android:layout_below="@+id/txtviewOut"
android:layout_centerHorizontal="true" />

MainActivity.java:
package com.example.helloandroidstudio;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
private Button btnClick;
private EditText Name, Date;
private TextView msg, NameOut, DateOut;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnClick = (Button) findViewById(R.id.button) ;
Name = (EditText) findViewById(R.id.textenter) ;
Date = (EditText) findViewById(R.id.editText) ;
msg = (TextView) findViewById(R.id.txtviewOut) ;
NameOut = (TextView) findViewById(R.id.txtoutName) ;
DateOut = (TextView) findViewById(R.id.txtOutDate) ;
//       msg.setVisibility(View.GONE);//set visibility to false on create
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
public void onClick(View v)
{
if (v == btnClick)
{
if (Name.equals("") == false && Date.equals("") == false)
{
NameOut = Name;
DateOut = Date;
msg.setVisibility(View.VISIBLE);
}
else
{
msg.setText("Please complete both fields");
msg.setVisibility(View.VISIBLE);
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//Handle action bar item clicks here. The action bar will
//automatically handle clicks on the Home/Up button, so long
//as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()) {
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}

Je l'ai essayé avec setInvisibility(point de Vue.DISPARU), mais encore le FC

J'ai vérifier avec les valeurs d'id, il isa la valeur de l'aide assisgned et j'ai fait faire le transtypage de l'objet...

veuillez garder à l'esprit, je l'ai fait en c#, mais c'est mon premier java/android app, de sorte s'il vous plaît garder avec moi

OriginalL'auteur | 2013-11-22