null pointer exception for onclicklistener event

Question

I'm getting a runtime exception in my code that says : java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.abiel.contacts/com.example.abiel.contacts.Data}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.relative.RelativeLayout

Here's my layout file:

<?xml version="1.0" encoding="utf-8"?>
<android.support.relative.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">
        <ImageView
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:id="@+id/ContactImage"
            android:layout_gravity="center_vertical"
            android:layout_alignParentTop="true"

            />

        <EditText
            android:layout_width="294dp"
            android:layout_height="wrap_content"
            android:id="@+id/editName"
            android:inputType="text"
            android:textSize="24sp"
            android:hint="Please write your name"
            android:textColorHint="#ff84eb"
            android:layout_centerVertical="true"
            />

        <EditText
            android:layout_width="296dp"
            android:layout_height="wrap_content"
            android:id="@+id/editNumber"
            android:inputType="number"
            android:textSize="24sp"
            android:hint="Enetr your number"
            android:textColorHint="#ff9cda"
            android:layout_above="@+id/editEmail"
            />

        <EditText
            android:layout_width="297dp"
            android:layout_height="wrap_content"
            android:id="@+id/editEmail"
            android:inputType="textEmailAddress"
            android:textSize="24sp"
            android:hint="Please write your E-mail"
            android:textColorHint="#ff96ea"
            android:layout_above="@+id/save"
            />

        <Button
            android:layout_width="171dp"
            android:layout_height="wrap_content"
            android:id="@+id/save"
            android:text="Save"
            android:layout_gravity="center_horizontal"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="86dp"
            android:background="#000000"
            android:textColor="#ff0009"
            android:textStyle="bold"/>

</android.support.relative.RelativeLayout>

when I use that line I get this runtime exception java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.abiel.contacts/com.example.abiel.contacts.Data}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.relative.RelativeLayout, it doesn't like my layout file not sure why I'll edit the post to show what the file looks like — Bubba, Feb 11 '18 at 03:26
`InflateException` doesn't tell you much. Look further on in the stack trace for the root cause. — Mike M., Feb 11 '18 at 03:31
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.relative.RelativeLayout" on path: DexPathList[[zip file "/data/app/com.example.abiel.contacts ..... How could it not recognize relative layout — Bubba, Feb 11 '18 at 03:38

akhilesh0707 · Accepted Answer · 2018-02-11T03:46:37.103

1

Your variable would not be initialized because you did not set view on Activity, you need to remove comment from //setContentView(R.layout.activity_second);

Update: Use only <RelativeLayout> instead of <android.support.relative.RelativeLayout, remove android.support.relative

edited Feb 11 '18 at 03:46

answered Feb 11 '18 at 03:23

akhilesh0707

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score 1 · Answer 2 · answered Feb 11 '18 at 03:23

As akhilesh0707 mentioned in his comment, you have removed the code to setContentView, which means that there is no layout attached to the activity. As a result, you are trying to define views without any layout to reference, so the views are not being instantiated correctly.

Simply uncommenting out the setContentView should solve your problem.

null pointer exception for onclicklistener event

2 Answers2