how can scrolled automatically in vertical manner till end of texts? code stops after time , not reach end. , want start scrolling till end after clicking button. suffice.
activity_main.xml
<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=".mainactivity" > <button android:id="@+id/button1" style="?android:attr/buttonstylesmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textview1" android:layout_alignparentright="true" android:text="ok" /> <scrollview android:id="@+id/scrollview1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerhorizontal="true" > <textview android:text="@string/random_text" android:id="@+id/textview1" android:ellipsize="marquee" android:marqueerepeatlimit ="marquee_forever" android:focusable="true" android:scrollbars="vertical" android:focusableintouchmode="true" android:maxlines="4" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </scrollview> </relativelayout> mainactivity.java
package com.bhabani2077.autoscroll; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.support.v7.widget.toolbar; import android.text.method.scrollingmovementmethod; import android.view.view; import android.view.animation.linearinterpolator; import android.widget.button; import android.widget.edittext; import android.widget.scrollview; import android.widget.scroller; import android.widget.textview; public class mainactivity extends appcompatactivity { toolbar mtoolbar; // edittext medittext; button mbutton; textview mtextview; scroller mscroller; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); mtoolbar= (toolbar) findviewbyid(r.id.toolbar); setsupportactionbar(mtoolbar); // medittext= (edittext) findviewbyid(r.id.edittext1); mbutton= (button) findviewbyid(r.id.button1); mtextview= (textview) findviewbyid(r.id.textview1); mtextview.setselected(true); mtextview.setmovementmethod(new scrollingmovementmethod()); mscroller=new scroller(mainactivity.this,new linearinterpolator()); mtextview.setscroller(mscroller); mscroller.startscroll(0,0,0,500,5000); mbutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { //if (medittext.gettext().length()>0){ // mtextview.append(medittext.gettext()+"\n"); // medittext.settext(""); } }); } }
i think found fix on own. created custom textview class scroller method , linked xml code. have look,
autoscrollingtext.java
public class autoscrollingtext extends textview { private static final float default_speed = 9.0f; public scroller scroller; public float speed = default_speed; public boolean continuousscrolling = true; public autoscrollingtext(context context) { super(context); scrollerinstance(context); } public autoscrollingtext(context context, attributeset attributes) { super(context, attributes); scrollerinstance(context); } public void scrollerinstance(context context) { scroller = new scroller(context, new linearinterpolator()); setscroller(scroller); } @override protected void onlayout(boolean changed, int left, int top, int right, int bottom) { super.onlayout(changed, left, top, right, bottom); if (scroller.isfinished()) { scroll(); } } public void scroll() { int viewheight = getheight(); int visibleheight = viewheight - getpaddingbottom() - getpaddingtop(); int lineheight = getlineheight(); int offset = -1 * visibleheight; int distance = visibleheight + getlinecount() * lineheight; int duration = (int) (distance * speed); scroller.startscroll(0, offset, 0, distance, duration); } public void setspeed(float speed) { this.speed = speed; } public float getspeed() { return speed; } public void setcontinuousscrolling(boolean continuousscrolling) { this.continuousscrolling = continuousscrolling; } public boolean iscontinuousscrolling() { return continuousscrolling; } } mainactivity.java
public class mainactivity extends appcompatactivity{ @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); } } activity_main.xml
<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" android:elevation="10dp" tools:context=".mainactivity" > <com.bhabani2077.scrolltext.autoscrollingtext android:text="@string/random_text" android:id="@+id/textview1" android:focusable="true" android:scrollhorizontally="false" android:scrollbars="vertical" android:ellipsize="marquee" android:layout_width="match_parent" android:marqueerepeatlimit ="marquee_forever" android:layout_height="200dp"/> </relativelayout> 