Android widget relativelayout cannot be cast to android widget textview

Question

bI have the following java code:

    Intent intent = getIntent();

    CO2 = intent.getIntExtra("CO2", 0);     

    TextView textCo2 = (TextView)findViewById(R.id.textRoadView1);
    textCo2.setText(String.valueOf("CO2 emissions: "+CO2+"g"));

And the XML file:

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/textRoadView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".RoadDetails" >

    <TextView
    android:id="@+id/textRoadView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/textView2"
    android:layout_marginTop="38dp"
    android:text="Medium Text"
    android:textAppearance="?android:attr/textAppearanceMedium" />
    </RelativeLayout>

So when I try to set some text in the "textCo2" I get this weird exception "Android widget relativelayout cannot be cast to android widget textview." I tried removing the "R.java" file and cleaning the project but the problem continued. I think the mistake is somewhere in my code but I can find it. Could you help me out?

never use an ID twice for different xml elements

Fraggles
– Fraggles

2014-02-10 08:22:01 +00:00
Commented Feb 10, 2014 at 8:22 — Fraggles
– Fraggles, Commented Feb 10, 2014 at 8:22

Damien R. · Accepted Answer · 2014-02-10 08:19:08Z

8

Your id is duplicate, remove if from your RelativeLayout, like this:

 <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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".RoadDetails" >

    <TextView
    android:id="@+id/textRoadView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/textView2"
    android:layout_marginTop="38dp"
    android:text="Medium Text"
    android:textAppearance="?android:attr/textAppearanceMedium" />
    </RelativeLayout>

answered Feb 10, 2014 at 8:19

Damien R.

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2 Comments

user3182266 Over a year ago

Dear GOD THANK YOU SO MUCH!!! I knew it was something small and stupid just I could not find it out! Thank you again!

InnocentKiller Over a year ago

@user3182266, Please accept the answer if it helped you. see the link that how to accept answer if you don't know how to accept it. meta.stackexchange.com/questions/5234/…

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