CODEWITHSUNDEEP
javaandroidxmltextview
user4718239
user4718239

Reputation:

Android TextView should scroll vertically automatically

I need a TextView which scrolls automatically vertically. This is my layout code:

activity_info.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/iView"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerHorizontal="true"
        android:contentDescription="@string/info"
        android:src="@mipmap/infoImage" />

    <TextView
        android:id="@+id/tView"
        android:layout_below="@+id/iView"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:layout_centerHorizontal="true"
        android:maxLines="500"
        android:scrollbars="vertical" />

    <RelativeLayout
        android:layout_below="@+id/tView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:gravity="center">

        <Button
            android:id="@+id/buttonYes"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:text="YES" />

        <Button
            android:id="@+id/buttonNo"
            android:layout_toEndOf="@id/buttonYes"
            android:layout_width="100dp"
            android:layout_height="50dp"            
            android:text="NO" />

    </RelativeLayout>

</RelativeLayout>

I read that I have to input this line:

tView.setMovementMethod(new ScrollingMovementMethod())

into my onCreate method in my activity:

InfoActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_info);

    TextView tView = (TextView) findViewById(R.id.tView);
    tView.setMovementMethod(new ScrollingMovementMethod());
}

If I do that, the TextView does not scroll automatically, if some new input (text) is inserted into the View. I know there are some other questions concerning the problem. But I've tried most of them.

How can I solve this problem?

Upvotes: 7

Views: 10260

Answers (3)

Prokash Sarkar
Prokash Sarkar

Reputation: 11873

You are almost there. Just add a few more things to achieve this,

First of all add those properties in your TextView

android:maxLines = "AN_INTEGER"
android:scrollbars = "vertical"
android:gravity="bottom"

Secondly as usual use,

tView.setMovementMethod(new ScrollingMovementMethod());

This should solve your problem.

Upvotes: 3

Sebastiano
Sebastiano

Reputation: 12339

I would suggest wrapping your TextView in a ScrollView

<ScrollView
    android:id="@+id/sView"
    android:layout_below="@+id/iView"
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:layout_centerHorizontal="true" >

  <TextView
      android:id="@+id/tView"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:maxLines="500"
      android:scrollbars="vertical"
      android:gravity="bottom" />

</ScrollView>

You can append new text by doing

public void appendAndScrollDown(String someText) {
    tView.append("\n" + someText);
    sView.fullScroll(View.FOCUS_DOWN);
}

Upvotes: 1

NaiveBz
NaiveBz

Reputation: 844

Try to set the textView to android:gravity="bottom" and use textView.append("\n"+"New Input Text."); for new input text;

Upvotes: 7

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