Android based on TextView implementation of the results of the case _android

This article is an example of an Android-based TextView implementation of the marquee effect. Share to everyone for your reference, specific as follows:

Package sweet.venst.act;
Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import java.io.UnsupportedEncodingException;
Import Android.content.Context;
Import Android.graphics.Canvas;
Import Android.graphics.Color;
Import Android.graphics.Paint;
Import Android.os.Parcel;
Import android.os.Parcelable;
Import Android.util.AttributeSet;
Import Android.util.DisplayMetrics;
Import Android.view.Display;
Import Android.view.View;
Import Android.view.WindowManager;
Import Android.view.View.MeasureSpec;
Import Android.view.View.OnClickListener;
Import Android.widget.TextView; public class Autoscrolltextview extends TextView {public final static String TAG = AutoScrollTextView.class.getSimpleNam
 E ();
 private float textlength = 0f;//text length private int viewwidth = 0;
 private int viewhight = 300; Private float step = horizontal axis pri of 0f;//textvate float y = 0f;//of text ordinate private float temp_view_plus_text_length = 0.0f;//temporary variable for calculation private float TEMP_VIEW_PLUS_TW O_text_length = 0.0f;//Temporary variable public boolean isstarting for calculation = false;//start scrolling private Paint Paint = null;//drawing style privat
 E String Text = "";//text content Public Autoscrolltextview (context) {super);
 Public Autoscrolltextview (context, AttributeSet attrs) {Super (context, attrs);
 Public Autoscrolltextview (context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle); 
 @Override protected void onmeasure (int widthmeasurespec, int heightmeasurespec) {//TODO auto-generated method stub
 Super.onmeasure (Widthmeasurespec, Heightmeasurespec);
 int measurewidth = Measurewidth (Widthmeasurespec);
 int measurehight = Measureheight (Heightmeasurespec);
 int measurewidth = 1024;
 int measurehight = 300;
 Viewwidth = Measurewidth;
 Viewhight = Measurehight;
 Setmeasureddimension (Viewwidth, viewhight); } privateint measurewidth (int widthmeasurespec) {int specmode = Measurespec.getmode (Widthmeasurespec);
 int specsize = measurespec.getsize (Widthmeasurespec);
 if (Specmode = = measurespec.unspecified) {return viewwidth;
  else {return viewwidth;
 } private int Measureheight (int widthmeasurespec) {int specmode = Measurespec.getmode (Widthmeasurespec);
 int specsize = measurespec.getsize (Widthmeasurespec);
 if (Specmode = = measurespec.unspecified) {return viewhight;
 else {return viewhight;
 } public void Setscrolltext (String text) {this.text = text;
 Inittextlength (text);
 Invalidate ();
 public void init (context cx) {paint = Getpaint ();
 Paint.settextsize (40);
 Paint.setcolor (Color.White);
 Text = GetText (). toString ();
 TextLength = Paint.measuretext (text);
 Viewwidth = GetWidth ();
  if (Viewwidth = = 0) {displaymetrics dm = new Displaymetrics ();
  DM = Cx.getapplicationcontext (). Getresources (). Getdisplaymetrics ();
 Viewwidth = Dm.widthpixels; } step= TextLength;
 Temp_view_plus_text_length = Viewwidth + textlength;
 Temp_view_plus_two_text_length = Viewwidth + textlength * 2;
 y = gettextsize () + getpaddingtop ();
 private void Inittextlength (String text) {textlength = Paint.measuretext (text);
 Step = TextLength;
 Temp_view_plus_text_length = Viewwidth + textlength;
 Temp_view_plus_two_text_length = Viewwidth + textlength * 2;
 @Override public parcelable onsaveinstancestate () {parcelable superstate = super.onsaveinstancestate ();
 savedstate ss = new savedstate (superstate);
 Ss.step = step;
 ss.isstarting = isstarting;
 return SS; @Override public void Onrestoreinstancestate (parcelable state) {if (!
  State instanceof Savedstate)) {super.onrestoreinstancestate (state);
 Return
 } savedstate SS = (savedstate) state;
 Super.onrestoreinstancestate (Ss.getsuperstate ());
 Step = Ss.step;
 isstarting = ss.isstarting;
 public static class Savedstate extends Basesavedstate {public Boolean isstarting = false; PublIC Float step = 0.0f;
 Savedstate (parcelable superstate) {super (superstate);
  @Override public void Writetoparcel (Parcel out, int flags) {Super.writetoparcel (out, flags);
  Out.writebooleanarray (new boolean[] {isstarting});
 Out.writefloat (step); public static final parcelable.creator<savedstate> Creator = new parcelable.creator<savedstate> () {Publi
  C savedstate[] NewArray (int size) {return new savedstate[size];
  Public savedstate Createfromparcel (Parcel in) {return new savedstate (in);
 }
 };
  Private savedstate (Parcel in) {super (in);
  Boolean[] B = null;
  In.readbooleanarray (b);
  if (b!= null && b.length > 0) isstarting = b[0];
 Step = In.readfloat ();
 The public void Startscroll () {isstarting = true;
 Invalidate ();
 public void Stopscroll () {isstarting = false;
 Invalidate ();
 public void OnDraw (Canvas Canvas) {canvas.save ();
 Canvas.drawtext (text, Temp_view_plus_text_length-step, y, paint); if (!isstarting) {return;
 Step + = 3.2;//0.5 is the text scrolling speed.
 if (Step > temp_view_plus_two_text_length) step = textlength;
Canvas.restore ();
 Invalidate ();
 Postinvalidate ();

 }
}

For more information on Android-related content readers can view the site topics: "Android Development Introduction and Advanced Course", "Android Multimedia operating skills Summary (audio, video, recording, etc.)", "Android Basic Components Usage Summary", " Android View tips Summary, Android layout layout tips and a summary of Android controls usage

I hope this article will help you with the Android program.