Auto horizontal scrolling in TextView

Question

I have a regular gallery. The gallery presents the elements that are the frame. There is one imageView and textView above it.

If the text in textView is too long, I need to scroll it automatically. This is one line of text, and it needs to be scrolled horizontally.

I found this piece of code:

TextView android:text="Single-line text view that scrolls automatically" android:singleLine="true" android:ellipsize="marquee" android:marqueeRepeatLimit ="marquee_forever" android:focusable="true" android:focusableInTouchMode="true" android:scrollHorizontally="true" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 

It works in my test application with only one text view. But this does not work in my gallery. Noting that the text remains stationary.

Any help?

Answer 1

I tried everything and finally came up with this. This works for me ... hope it someday helps you. Greetings.

  package com.gui.custom_views; import android.content.Context; import android.graphics.Paint; import android.graphics.Typeface; import android.text.TextUtils; import android.util.AttributeSet; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.LinearInterpolator; import android.view.animation.TranslateAnimation; import android.widget.LinearLayout; import android.widget.ScrollView; import android.widget.TextView; import com.media_player.AndroidMediaPlayerActivity; /** * Custom Automatic Scrollable Text View * * @author Veljko Ilkic * */ public class AutomaticScrollTextView extends LinearLayout { // Context of application Context context; // TextView private TextView mTextField1; // Horizontal scroll private ScrollView mScrollView1; // Animation on start private Animation mMoveTextOnStart = null; // Out animation private Animation mMoveText1TextOut = null; // Duration of animation on start private int durationStart; // Duration of animation private int duration; // Pain for drawing text private Paint mPaint; // Text current width private float mText1TextWidth; /** * Control the speed. The lower this value, the faster it will scroll. */ public static final int MS_PER_PX = 80; /** * Control the pause between the animations. Also, after starting this * activity. */ public static final int PAUSE_BETWEEN_ANIMATIONS = 0; private boolean mCancelled = false; // Layout width private int mWidth; // Animation thread private Runnable mAnimation1StartRunnable; public AutomaticScrollTextView(Context context) { super(context); init(context); this.context = context; } public AutomaticScrollTextView(Context context, AttributeSet attrs) { super(context, attrs); init(context); this.context = context; } private void init(Context context) { initView(context); // init helper mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setStrokeWidth(1); mPaint.setStrokeCap(Paint.Cap.ROUND); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); mWidth = getMeasuredWidth(); // Calculate prepare(); // Setup setupText1Marquee(); } @Override public void setOnClickListener(OnClickListener l) { super.setOnClickListener(l); mTextField1.setOnClickListener(l); } // Method to finally start the marquee. public void startMarquee() { prepare(); prepareTextFields(); startTextField1Animation(); mCancelled = false; } private void startTextField1Animation() { mAnimation1StartRunnable = new Runnable() { public void run() { mTextField1.setVisibility(View.VISIBLE); mTextField1.startAnimation(mMoveTextOnStart); } }; postDelayed(mAnimation1StartRunnable, PAUSE_BETWEEN_ANIMATIONS); } public void reset() { mCancelled = true; if (mAnimation1StartRunnable != null) { removeCallbacks(mAnimation1StartRunnable); } mTextField1.clearAnimation(); prepareTextFields(); mMoveTextOnStart.reset(); mMoveText1TextOut.reset(); mScrollView1.removeView(mTextField1); mScrollView1.addView(mTextField1); mTextField1.setEllipsize(TextUtils.TruncateAt.END); invalidate(); } public void prepareTextFields() { mTextField1.setEllipsize(TextUtils.TruncateAt.END); mTextField1.setVisibility(View.INVISIBLE); expandTextView(mTextField1); } private void setupText1Marquee() { // Calculate duration of animations durationStart = (int) ((mWidth + mText1TextWidth) * MS_PER_PX); duration = (int) (2 * mWidth * MS_PER_PX); // On start animation mMoveTextOnStart = new TranslateAnimation(0, -mWidth - mText1TextWidth, 0, 0); mMoveTextOnStart.setDuration(durationStart); mMoveTextOnStart.setInterpolator(new LinearInterpolator()); mMoveTextOnStart.setFillAfter(true); // Main scrolling animation mMoveText1TextOut = new TranslateAnimation(mWidth, -mWidth - mText1TextWidth, 0, 0); mMoveText1TextOut.setDuration(duration); mMoveText1TextOut.setInterpolator(new LinearInterpolator()); mMoveText1TextOut.setFillAfter(true); mMoveText1TextOut.setRepeatCount(Animation.INFINITE); // Animation listeners mMoveTextOnStart .setAnimationListener(new Animation.AnimationListener() { public void onAnimationStart(Animation animation) { invalidate(); mTextField1.invalidate(); } public void onAnimationEnd(Animation animation) { if (mCancelled) { return; } mTextField1.startAnimation(mMoveText1TextOut); } public void onAnimationRepeat(Animation animation) { invalidate(); mTextField1.invalidate(); } }); mMoveText1TextOut .setAnimationListener(new Animation.AnimationListener() { public void onAnimationStart(Animation animation) { invalidate(); mTextField1.invalidate(); } public void onAnimationEnd(Animation animation) { if (mCancelled) { return; } } public void onAnimationRepeat(Animation animation) { invalidate(); mTextField1.invalidate(); } }); } private void prepare() { // Measure mPaint.setTextSize(mTextField1.getTextSize()); mPaint.setTypeface(mTextField1.getTypeface()); mText1TextWidth = mPaint.measureText(mTextField1.getText().toString()); setupText1Marquee(); } private void initView(Context context) { setOrientation(LinearLayout.VERTICAL); setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, Gravity.LEFT)); setPadding(0, 0, 0, 0); // Scroll View 1 LayoutParams sv1lp = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); sv1lp.gravity = Gravity.CENTER_HORIZONTAL; mScrollView1 = new ScrollView(context); // Scroll View 1 - Text Field mTextField1 = new TextView(context); mTextField1.setSingleLine(true); mTextField1.setEllipsize(TextUtils.TruncateAt.END); mTextField1.setTypeface(null, Typeface.BOLD); mScrollView1.addView(mTextField1, new ScrollView.LayoutParams( mTextField1.getWidth(), LayoutParams.WRAP_CONTENT)); addView(mScrollView1, sv1lp); } public void setText1(String text) { String temp = ""; if (text.length() < 10) { temp = " " + text + " "; } else { temp = text; } mTextField1.setText(temp); } public void setTextSize1(int textSize) { mTextField1.setTextSize(textSize); } public void setTextColor1(int textColor) { mTextField1.setTextColor(textColor); } private void expandTextView(TextView textView) { ViewGroup.LayoutParams lp = textView.getLayoutParams(); lp.width = AndroidMediaPlayerActivity.getScreenWidth(); textView.setLayoutParams(lp); } } 

Answer 2

Try this native TextView class:

 public class AutoScrollingTextView extends TextView { public AutoScrollingTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public AutoScrollingTextView(Context context, AttributeSet attrs) { super(context, attrs); } public AutoScrollingTextView(Context context) { super(context); } @Override protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { if (focused) { super.onFocusChanged(focused, direction, previouslyFocusedRect); } } @Override public void onWindowFocusChanged(boolean focused) { if (focused) { super.onWindowFocusChanged(focused); } } @Override public boolean isFocused() { return true; } } 

and set the following XML attributes:

 android:scrollHorizontally="true" android:ellipsize="marquee" android:marqueeRepeatLimit="marquee_forever" 

This works great in my dictionary applications, where multiple entries may be required to automatically scroll at the same time to display the full content.

Answer 3

The marquee effect on TextView designed to work only when the view is focused or selected. The XML code you are trying to do all the time with TextView . Unfortunately, since only one view can be focused at any time, and since you have several views in the gallery, this approach will not work for you.

The easiest way to do this otherwise is to always select TextViews . Multiple TextViews can hold the selected state at a time. The selection is for the active AdapterView, but still works outside of one. First, remove the focus-changing attributes from the XML, and then just call TextView.setSelected(true) some time after the view is initialized. in Activity.onCreate(Bundle) (there is no XML attribute for this). If you are supplying views from an adapter, you can call TextView.setSelected(true) during the getView() method after inflating the view.

An example project is shown here, showing the scope of several text elements and the behavior inside the gallery.

Answer 4

Try using ViewPager instead of gallery. It is available in android support packages. http://android-developers.blogspot.in/2011/08/horizontal-view-swiping-with-viewpager.html

Answer 5

I once ran into this problem and finally fixed the problem by calling .setFocus () in a textView.

Answer 6

Hi You have a tag in the xml file itself. And also use the Scrollview FOCUS_DOWN property in the java file ... Hope this helps you ...

Answer 7

This code works correctly for me.

Scrollview = (Scrollview) findViewById (R.id.scrollview1); tb2.setTextSize (30);

  tb2.setMovementMethod(new ScrollingMovementMethod()); scrollview.post(new Runnable() { public void run() { scrollview.fullScroll(View.FOCUS_DOWN); } }); 

Answer 8

 public class ScrollingTextView extends TextView { public ScrollingTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public ScrollingTextView(Context context, AttributeSet attrs) { super(context, attrs); } public ScrollingTextView(Context context) { super(context); } @Override protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { if (focused) { super.onFocusChanged(focused, direction, previouslyFocusedRect); } } @Override public void onWindowFocusChanged(boolean focused) { if (focused) { super.onWindowFocusChanged(focused); } } @Override public boolean isFocused() { return true; } } <com.test.autoscroll.ScrollingTextView android:id="@+id/actionbar_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="10dip" android:paddingRight="10dip" android:textSize="16dip" android:textStyle="bold" android:lines="1" android:scrollHorizontally="true" android:ellipsize="marquee" android:text="autoscrollable textview without focus to textview...working...." android:marqueeRepeatLimit="marquee_forever" />