java.lang.NullPointerException about expandabletextview HOT 8 CLOSED

Same for me

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The currently implementation requires that the view Ids for TextView and ImageButton to be set to "@id/expandable_text" and "@id/expand_collapse" respectively.
I also updated README to mention it.

If the problem still persists after you update your layout file to use those ids just like the below, please let me know and I will investigate.

  <!-- sample xml -->
  <com.ms.square.android.expandabletextview.ExpandableTextView
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:expandableTextView="http://schemas.android.com/apk/res-auto"
      android:id="@+id/expand_text_view"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      expandableTextView:maxCollapsedLines="4"
      expandableTextView:animDuration="200">
      <TextView
          android:id="@id/expandable_text"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_marginLeft="10dp"
          android:layout_marginRight="10dp"
          android:textSize="16sp"
          android:textColor="#666666" />
      <ImageButton
          android:id="@id/expand_collapse"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_margin="16dp"
          android:layout_gravity="right|bottom"
          android:background="@android:color/transparent"/>
  </com.ms.square.android.expandabletextview.ExpandableTextView>

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Ok i got it. Working Thanks.

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Is it possible to use a ImageView with the same id as the ImageButton? Is there a way to customize the imageButton image? Thanks.

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Is it possible to use a ImageView with the same id as the ImageButton?
-> Nope. It currently only supports ImageButton.

Is there a way to customize the imageButton image?
->As written on README, you can set the following attributes in your layout xml file to customize the images of the ImageButton.

• expandDrawable
  Customize a drawable set to ImageButton to expand the TextView
• collapseDrawable
  Customize a drawable set to ImageButton to collapse the TextView

Thanks and plz let me know if you have any other issue.

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expandableTextView:expandDrawable="@drawable/ic_my_draw" seems not to works. Is it correct? Inside the ImageButton.

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You've done a great job, works perfectly. Thank You.

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I have a problem:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.ms.square.android.expandabletextview.ExpandableTextView.setText(java.lang.CharSequence)' on a null object reference
at com.company.jobs.jobsproject.MainActivity.onCreate(MainActivity.java:39)

In the MainActivity I have this:
expTv1 = (ExpandableTextView) findViewById(R.id.expand_text_view);
expTv1.setText(texto_largo); //line 39

texto_largo is a String with the "Lorem Ipsum"

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