Ich folgte einem Tutorial um http://www.android4devs.com/2015/06/navigation-view-material-design-support.html und habe es in meinem Projekt implementiert, aber ich möchte den Text in der Kopfzeile dynamisch ändern, wie ein Benutzer anmeldet, aber meine Referenz auf die Textansicht immer als zurück null, ich habe alles probiert.wie Ansichten in Navigationsseitenkopf steuern
heren mein header.xml Code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="220dp"
xmlns:tools="http://schemas.android.com/tools"
android:background="@drawable/background_material"
android:orientation="vertical"
android:id="@+id/header_relative_layout"
tools:context=".NavMainActivity">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/profile_image"
android:layout_width="76dp"
android:layout_height="76dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:src="@drawable/profile"
app:border_color="#FF000000" />
<TextView
android:id="@+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/schoolname"
android:layout_alignLeft="@+id/profile_image"
android:layout_alignStart="@+id/profile_image"
android:gravity="left"
android:paddingBottom="4dp"
android:text="Staff Name"
android:textColor="#FFF"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/schoolname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/username"
android:layout_alignParentBottom="true"
android:layout_alignStart="@+id/username"
android:layout_marginBottom="8dp"
android:gravity="left"
android:text="Secondary School"
android:textColor="#fff"
android:textSize="18sp" />
</RelativeLayout>
und herer meine nav_activity_main.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".NavMainActivity">
<LinearLayout
android:id="@+id/main_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<include
android:id="@+id/toolbar"
layout="@layout/tool_bar" />
<FrameLayout
android:id="@+id/frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/header"
app:menu="@menu/drawer" />
</android.support.v4.widget.DrawerLayout>
here meine Tätigkeit
setContentView(R.layout.nav_activity_main);
RelativeLayout headerLayout = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.header, null);
TextView staff = (TextView) headerLayout.findViewById(R.id.username);
staff.setText("it worked");
ive versucht, alle Lösungen keine zu funktionieren scheint, pls Was mache ich falsch.
danke bro es hat funktioniert – Light
bro.setText ("Es hat funktioniert"); – Light