Android rewrite TextView to achieve a neat text typesetting method (with demo source download) _android

This article describes the Android rewrite TextView to achieve a neat text typesetting method. Share to everyone for your reference, specific as follows:

Xrtextview class

Package rong.android.test;
Import Org.json.JSONArray;
Import org.json.JSONException;
Import Android.content.Context;
Import Android.graphics.Canvas;
Import Android.graphics.Color;
Import Android.graphics.Paint;
Import Android.util.AttributeSet;
Import Android.view.View;
Import Android.widget.TextView;
 public class Xrtextview extends textview{private final String namespace = "Rong.android.TextView";
 private String text;
 private float textsize;
 private float paddingleft;
 private float paddingright;
 private float marginleft;
 private float marginright;
 private int textcolor;
 Private Jsonarray ColorIndex;
 Private Paint paint1 = new Paint ();
 Private Paint Paintcolor = new Paint ();
 private float textshowwidth;
 private float Spacing = 0; private float linespacing = 1.3f;//between line and line public xrtextview (context, AttributeSet attrs) {Super (context, attrs)
 ;
 Text = Attrs.getattributevalue ("http://schemas.android.com/apk/res/android", "text"); Textsize = Attrs.getattributeIntvalue (namespace, "Textsize", 25)//font Size TextColor = Attrs.getattributeintvalue (namespace, "TextColor", Color.Blue)
 ;//FONT Color paddingleft = Attrs.getattributeintvalue (namespace, "Paddingleft", 0);
 Paddingright = Attrs.getattributeintvalue (namespace, "Paddingright", 0);
 MarginLeft = Attrs.getattributeintvalue (namespace, "MarginLeft", 0);
 MarginRight = Attrs.getattributeintvalue (namespace, "MarginRight", 0);
 Paint1.settextsize (TEXTSIZE);
 Paint1.setcolor (TextColor);
 Paint1.setantialias (TRUE);
 Paintcolor.setantialias (TRUE);
 Paintcolor.settextsize (TEXTSIZE);
 Paintcolor.setcolor (Color.Blue); Public Xrtextview (context context, float textsize, int textcolor, float paddingleft, float paddingright, float Marginle
 FT, float marginright) {super (context);
 This.textsize = Textsize;
 This.textcolor = TextColor;
 This.paddingleft = paddingleft;
 This.paddingright = paddingright;
 This.marginleft = MarginLeft;
 This.marginright = marginright;
 Paint1.settextsize (TEXTSIZE); Paint1.setcoloR (TextColor); 
 Paint1.setantialias (TRUE);
 Paintcolor.setantialias (TRUE);
 Paintcolor.settextsize (TEXTSIZE);
 Paintcolor.setcolor (Color.Blue);
 Public Jsonarray Getcolorindex () {return colorindex;
 public void Setcolorindex (Jsonarray colorindex) {this.colorindex = ColorIndex; /** * Incoming an index to determine whether the current word is highlighted * @param index * @return * @throws jsonexception/public boolean iscolor (int index) th
 Rows jsonexception{if (ColorIndex = = null) {return false;
  for (int i = 0; i < colorindex.length (); i + +) {Jsonarray array = Colorindex.getjsonarray (i);
  int start = array.getint (0);
  int end = Array.getint (1)-1;
  if (index >= start && index <= end) {return true;
 return false;
 } @Override protected void OnDraw (Canvas Canvas) {//Super.ondraw (Canvas);
 View view= (view) this.getparent ();
 Textshowwidth=view.getmeasuredwidth ()-paddingleft-paddingright-marginleft-marginright;
 int linecount = 0; Text = This.gettext (). toString ();//.replaceall ("\ n", "\ r \ n");
 if (text==null) return;
 char[] Textchararray = Text.tochararray ();
 Painted width float drawedwidth = 0;
 float Charwidth;
  for (int i = 0; i < textchararray.length i++) {charwidth = Paint1.measuretext (Textchararray, I, 1);
  if (textchararray[i]== ' \ n ') {linecount++;
  drawedwidth = 0;
  Continue
  } if (Textshowwidth-drawedwidth < charwidth) {linecount++;
  drawedwidth = 0;
  Boolean color = false;
  try {color = IsColor (i);
  catch (Jsonexception E1) {//TODO auto-generated catch block E1.printstacktrace (); } if (color) {Canvas.drawtext (Textchararray, I, 1, paddingleft + drawedwidth, (LineCount + 1) * Textsize * Linespaci
  Ng, Paintcolor); }else{Canvas.drawtext (Textchararray, I, 1, paddingleft + drawedwidth, (LineCount + 1) * Textsize * linespacing, pain
  T1); } if (Textchararray[i] > 127 && textchararray[i]!= ', ' && textchararray[i '!= ', ' && Textchar Array[i]!= '. ' && Textchararray[i]!= ': ' && textchararray[i]!= '!
  ') {drawedwidth + = charwidth + Spacing;
  }else{Drawedwidth + = Charwidth;
 } setheight ((int) (LineCount + 1) * (int) textsize * linespacing + 10));
 public float getspacing () {return Spacing;
 public void setspacing (float spacing) {spacing = spacing;
 public float getmylinespacing () {return linespacing;
 public void setmylinespacing (float linespacing) {linespacing = linespacing;
 public float getmytextsize () {return textsize;
 public void Setmytextsize (float textsize) {this.textsize = Textsize;
 Paint1.settextsize (TEXTSIZE);
 Paintcolor.settextsize (TEXTSIZE);

 }
}

Mainactivity class

Package rong.android.test;
Import Android.os.Bundle;
Import Android.widget.TextView;
Import android.app.Activity;
public class Mainactivity extends activity {
 private xrtextview Xrtextview = null;
 Private TextView TextView = null;
 Private String content = "Abcdefgabcdef I want you to LFWJKDFL;SKJF Asljkflskjfls; KJFSLJFWFISDLFJSLLKJSDFJLSKJF546132S1F3SD4F31S3DFFSLFKSJDFLJLSADKJFLSAJDF Sdfjklsajdflsa;jdfls's!@#$%^&* () _ " ;
 @Override
 protected void onCreate (Bundle savedinstancestate) {
 super.oncreate (savedinstancestate);
 Setcontentview (r.layout.activity_main);
 Xrtextview = (Xrtextview) This.findviewbyid (R.ID.MYTEXTVIEW_TV);
 Xrtextview.settext (content);
 TextView = (TextView) This.findviewbyid (R.ID.MYTEXTVIEW_TV1);
 Textview.settext (content);
 }

Layout file

<linearlayout 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:orientation= "vertical" >
  <rong.android.test.xrtextview
    android:id= "@+id/mytextview_ TV "
    android:layout_width=" match_parent "
    android:layout_height=" wrap_content "/>
  <textview
    android:id= "@+id/mytextview_tv1"
    android:layout_width= "match_parent"
    android:layout_height= " Wrap_content "
    android:textcolor=" @android: Color/black "/>
</LinearLayout>

Full instance code click here to download the site.

More interested readers of Android-related content can view this site: "Introduction to Android Development and advanced Course", "Android Service Component Usage Summary", "Android Basic component Usage Summary" and "Android Control usage Summary"

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