Justify TextView in Android

by androindian · Published September 12, 2016 · Updated July 23, 2019

3887 views.

If you want to justify your text in Android first need to below dependency in gradle

Java

compile 'com.uncopt:android.justified:1.0'

1	compile 'com.uncopt:android.justified:1.0'

after that need to add below two java files in your src

TextJustifyUtils.java

Java

package androindin.learnandroid; /** * Created by Raj on 6/16/2016. */ import android.graphics.Paint; import android.view.Gravity; import android.widget.TextView; public class TextJustifyUtils { // Please use run(...) instead public static void justify(TextView textView) { Paint paint = new Paint(); String[] blocks; float spaceOffset = 0; float textWrapWidth = 0; int spacesToSpread; float wrappedEdgeSpace; String block; String[] lineAsWords; String wrappedLine; String smb = ""; Object[] wrappedObj; // Pull widget properties paint.setColor(textView.getCurrentTextColor()); paint.setTypeface(textView.getTypeface()); paint.setTextSize(textView.getTextSize()); textWrapWidth = textView.getWidth(); spaceOffset = paint.measureText(" "); blocks = textView.getText().toString().split("((?<=\n)|(?=\n))"); if (textWrapWidth < 20) { return; } for (int i = 0; i < blocks.length; i++) { block = blocks[i]; if (block.length() == 0) { continue; } else if (block.equals("\n")) { smb += block; continue; } block = block.trim(); if (block.length() == 0) continue; wrappedObj = TextJustifyUtils.createWrappedLine(block, paint, spaceOffset, textWrapWidth); wrappedLine = ((String) wrappedObj[0]); wrappedEdgeSpace = (Float) wrappedObj[1]; lineAsWords = wrappedLine.split(" "); spacesToSpread = (int) (wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace / spaceOffset : 0); for (String word : lineAsWords) { smb += word + " "; if (--spacesToSpread > 0) { smb += " "; } } smb = smb.trim(); if (blocks[i].length() > 0) { blocks[i] = blocks[i].substring(wrappedLine.length()); if (blocks[i].length() > 0) { smb += "\n"; } i--; } } textView.setGravity(Gravity.LEFT); textView.setText(smb); } protected static Object[] createWrappedLine(String block, Paint paint, float spaceOffset, float maxWidth) { float cacheWidth = maxWidth; float origMaxWidth = maxWidth; String line = ""; for (String word : block.split("\\s")) { cacheWidth = paint.measureText(word); maxWidth -= cacheWidth; if (maxWidth <= 0) { return new Object[] { line, maxWidth + cacheWidth + spaceOffset }; } line += word + " "; maxWidth -= spaceOffset; } if (paint.measureText(block) <= origMaxWidth) { return new Object[] { block, Float.MIN_VALUE }; } return new Object[] { line, maxWidth }; } final static String SYSTEM_NEWLINE = "\n"; final static float COMPLEXITY = 5.12f; // Reducing this will increase // efficiency but will decrease // effectiveness final static Paint p = new Paint(); public static void run(final TextView tv, float origWidth) { String s = tv.getText().toString(); p.setTypeface(tv.getTypeface()); String[] splits = s.split(SYSTEM_NEWLINE); float width = origWidth - 5; for (int x = 0; x < splits.length; x++) if (p.measureText(splits[x]) > width) { splits[x] = wrap(splits[x], width, p); String[] microSplits = splits[x].split(SYSTEM_NEWLINE); for (int y = 0; y < microSplits.length - 1; y++) microSplits[y] = justify(removeLast(microSplits[y], " "), width, p); StringBuilder smb_internal = new StringBuilder(); for (int z = 0; z < microSplits.length; z++) smb_internal.append(microSplits[z] + ((z + 1 < microSplits.length) ? SYSTEM_NEWLINE : "")); splits[x] = smb_internal.toString(); } final StringBuilder smb = new StringBuilder(); for (String cleaned : splits) smb.append(cleaned + SYSTEM_NEWLINE); tv.setGravity(Gravity.LEFT); tv.setText(smb); } private static String wrap(String s, float width, Paint p) { String[] str = s.split("\\s"); // regex StringBuilder smb = new StringBuilder(); // save memory smb.append(SYSTEM_NEWLINE); for (int x = 0; x < str.length; x++) { float length = p.measureText(str[x]); String[] pieces = smb.toString().split(SYSTEM_NEWLINE); try { if (p.measureText(pieces[pieces.length - 1]) + length > width) smb.append(SYSTEM_NEWLINE); } catch (Exception e) { } smb.append(str[x] + " "); } return smb.toString().replaceFirst(SYSTEM_NEWLINE, ""); } private static String removeLast(String s, String g) { if (s.contains(g)) { int index = s.lastIndexOf(g); int indexEnd = index + g.length(); if (index == 0) return s.substring(1); else if (index == s.length() - 1) return s.substring(0, index); else return s.substring(0, index) + s.substring(indexEnd); } return s; } private static String justifyOperation(String s, float width, Paint p) { float holder = (float) (COMPLEXITY * Math.random()); while (s.contains(Float.toString(holder))) holder = (float) (COMPLEXITY * Math.random()); String holder_string = Float.toString(holder); float lessThan = width; int timeOut = 100; int current = 0; while (p.measureText(s) < lessThan && current < timeOut) { s = s.replaceFirst(" ([^" + holder_string + "])", " " + holder_string + "$1"); lessThan = p.measureText(holder_string) + lessThan - p.measureText(" "); current++; } String cleaned = s.replaceAll(holder_string, " "); return cleaned; } private static String justify(String s, float width, Paint p) { while (p.measureText(s) < width) { s = justifyOperation(s, width, p); } return s; } }

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package androindin.learnandroid;   /** * Created by Raj on 6/16/2016. */ import android.graphics.Paint; import android.view.Gravity; import android.widget.TextView;     public class TextJustifyUtils {     // Please use run(...) instead     public static void justify(TextView textView) {         Paint paint = new Paint();           String[] blocks;         float spaceOffset = 0;         float textWrapWidth = 0;           int spacesToSpread;         float wrappedEdgeSpace;         String block;         String[] lineAsWords;         String wrappedLine;         String smb = "";         Object[] wrappedObj;           // Pull widget properties         paint.setColor(textView.getCurrentTextColor());         paint.setTypeface(textView.getTypeface());         paint.setTextSize(textView.getTextSize());           textWrapWidth = textView.getWidth();         spaceOffset = paint.measureText(" ");         blocks = textView.getText().toString().split("((?<=\n)|(?=\n))");           if (textWrapWidth < 20) {             return;         }           for (int i = 0; i < blocks.length; i++) {             block = blocks[i];               if (block.length() == 0) {                 continue;             } else if (block.equals("\n")) {                 smb += block;                 continue;             }               block = block.trim();               if (block.length() == 0)                 continue;               wrappedObj = TextJustifyUtils.createWrappedLine(block, paint,                     spaceOffset, textWrapWidth);             wrappedLine = ((String) wrappedObj[0]);             wrappedEdgeSpace = (Float) wrappedObj[1];             lineAsWords = wrappedLine.split(" ");             spacesToSpread = (int) (wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace                     / spaceOffset                     : 0);               for (String word : lineAsWords) {                 smb += word + " ";                   if (--spacesToSpread > 0) {                     smb += " ";                 }             }               smb = smb.trim();               if (blocks[i].length() > 0) {                 blocks[i] = blocks[i].substring(wrappedLine.length());                   if (blocks[i].length() > 0) {                     smb += "\n";                 }                   i--;             }         }           textView.setGravity(Gravity.LEFT);         textView.setText(smb);     }       protected static Object[] createWrappedLine(String block, Paint paint,                                                 float spaceOffset, float maxWidth) {         float cacheWidth = maxWidth;         float origMaxWidth = maxWidth;           String line = "";           for (String word : block.split("\\s")) {             cacheWidth = paint.measureText(word);             maxWidth -= cacheWidth;               if (maxWidth <= 0) {                 return new Object[] { line, maxWidth + cacheWidth + spaceOffset };             }               line += word + " ";             maxWidth -= spaceOffset;           }           if (paint.measureText(block) <= origMaxWidth) {             return new Object[] { block, Float.MIN_VALUE };         }           return new Object[] { line, maxWidth };     }       final static String SYSTEM_NEWLINE = "\n";     final static float COMPLEXITY = 5.12f; // Reducing this will increase     // efficiency but will decrease     // effectiveness     final static Paint p = new Paint();       public static void run(final TextView tv, float origWidth) {         String s = tv.getText().toString();         p.setTypeface(tv.getTypeface());         String[] splits = s.split(SYSTEM_NEWLINE);         float width = origWidth - 5;         for (int x = 0; x < splits.length; x++)             if (p.measureText(splits[x]) > width) {                 splits[x] = wrap(splits[x], width, p);                 String[] microSplits = splits[x].split(SYSTEM_NEWLINE);                 for (int y = 0; y < microSplits.length - 1; y++)                     microSplits[y] = justify(removeLast(microSplits[y], " "),                             width, p);                 StringBuilder smb_internal = new StringBuilder();                 for (int z = 0; z < microSplits.length; z++)                     smb_internal.append(microSplits[z]                             + ((z + 1 < microSplits.length) ? SYSTEM_NEWLINE                             : ""));                 splits[x] = smb_internal.toString();             }         final StringBuilder smb = new StringBuilder();         for (String cleaned : splits)             smb.append(cleaned + SYSTEM_NEWLINE);         tv.setGravity(Gravity.LEFT);         tv.setText(smb);     }       private static String wrap(String s, float width, Paint p) {         String[] str = s.split("\\s"); // regex         StringBuilder smb = new StringBuilder(); // save memory         smb.append(SYSTEM_NEWLINE);         for (int x = 0; x < str.length; x++) {             float length = p.measureText(str[x]);             String[] pieces = smb.toString().split(SYSTEM_NEWLINE);             try {                 if (p.measureText(pieces[pieces.length - 1]) + length > width)                     smb.append(SYSTEM_NEWLINE);             } catch (Exception e) {             }             smb.append(str[x] + " ");         }         return smb.toString().replaceFirst(SYSTEM_NEWLINE, "");     }       private static String removeLast(String s, String g) {         if (s.contains(g)) {             int index = s.lastIndexOf(g);             int indexEnd = index + g.length();             if (index == 0)                 return s.substring(1);             else if (index == s.length() - 1)                 return s.substring(0, index);             else                 return s.substring(0, index) + s.substring(indexEnd);         }         return s;     }       private static String justifyOperation(String s, float width, Paint p) {         float holder = (float) (COMPLEXITY * Math.random());         while (s.contains(Float.toString(holder)))             holder = (float) (COMPLEXITY * Math.random());         String holder_string = Float.toString(holder);         float lessThan = width;         int timeOut = 100;         int current = 0;         while (p.measureText(s) < lessThan && current < timeOut) {             s = s.replaceFirst(" ([^" + holder_string + "])", " "                     + holder_string + "$1");             lessThan = p.measureText(holder_string) + lessThan                     - p.measureText(" ");             current++;         }         String cleaned = s.replaceAll(holder_string, " ");         return cleaned;     }       private static String justify(String s, float width, Paint p) {         while (p.measureText(s) < width) {             s = justifyOperation(s, width, p);         }         return s;     } }

TextViewEx.java

Java

package androindin.learnandroid; /** * Created by Raj on 6/16/2016. */ import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Paint.Align; import android.graphics.Canvas; import android.graphics.Paint; import android.widget.TextView; import android.util.AttributeSet; public class TextViewEx extends TextView { private Paint paint = new Paint(); private String[] blocks; private float spaceOffset = 0; private float horizontalOffset = 0; private float verticalOffset = 0; private float horizontalFontOffset = 0; private float dirtyRegionWidth = 0; private boolean wrapEnabled = false; int left, top, right, bottom = 0; private Align _align = Align.LEFT; private float strecthOffset; private float wrappedEdgeSpace; private String block; private String wrappedLine; private String[] lineAsWords; private Object[] wrappedObj; private Bitmap cache = null; private boolean cacheEnabled = false; public TextViewEx(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // set a minimum of left and right padding so that the texts are not too // close to the side screen // this.setPadding(10, 0, 10, 0); } public TextViewEx(Context context, AttributeSet attrs) { super(context, attrs); // this.setPadding(10, 0, 10, 0); } public TextViewEx(Context context) { super(context); // this.setPadding(10, 0, 10, 0); } @Override public void setPadding(int left, int top, int right, int bottom) { // TODO Auto-generated method stub super.setPadding(left + 10, top, right + 10, bottom); } @Override public void setDrawingCacheEnabled(boolean cacheEnabled) { this.cacheEnabled = cacheEnabled; } public void setText(String st, boolean wrap) { wrapEnabled = wrap; super.setText(st); } public void setTextAlign(Align align) { _align = align; } @SuppressLint("NewApi") @Override protected void onDraw(Canvas canvas) { // If wrap is disabled then, // request original onDraw if (!wrapEnabled) { super.onDraw(canvas); return; } // Active canas needs to be set // based on cacheEnabled Canvas activeCanvas = null; // Set the active canvas based on // whether cache is enabled if (cacheEnabled) { if (cache != null) { // Draw to the OS provided canvas // if the cache is not empty canvas.drawBitmap(cache, 0, 0, paint); return; } else { // Create a bitmap and set the activeCanvas // to the one derived from the bitmap cache = Bitmap.createBitmap(getWidth(), getHeight(), Config.ARGB_4444); activeCanvas = new Canvas(cache); } } else { // Active canvas is the OS // provided canvas activeCanvas = canvas; } // Pull widget properties paint.setColor(getCurrentTextColor()); paint.setTypeface(getTypeface()); paint.setTextSize(getTextSize()); paint.setTextAlign(_align); paint.setFlags(Paint.ANTI_ALIAS_FLAG); // minus out the paddings pixel dirtyRegionWidth = getWidth() - getPaddingLeft() - getPaddingRight(); int maxLines = Integer.MAX_VALUE; int currentapiVersion = android.os.Build.VERSION.SDK_INT; if (currentapiVersion >= android.os.Build.VERSION_CODES.JELLY_BEAN) { maxLines = getMaxLines(); } int lines = 1; blocks = getText().toString().split("((?<=\n)|(?=\n))"); verticalOffset = horizontalFontOffset = getLineHeight() - 0.5f; // Temp // fix spaceOffset = paint.measureText(" "); for (int i = 0; i < blocks.length && lines <= maxLines; i++) { block = blocks[i]; horizontalOffset = 0; if (block.length() == 0) { continue; } else if (block.equals("\n")) { verticalOffset += horizontalFontOffset; continue; } block = block.trim(); if (block.length() == 0) { continue; } wrappedObj = TextJustifyUtils.createWrappedLine(block, paint, spaceOffset, dirtyRegionWidth); wrappedLine = ((String) wrappedObj[0]); wrappedEdgeSpace = (Float) wrappedObj[1]; lineAsWords = wrappedLine.split(" "); strecthOffset = wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace / (lineAsWords.length - 1) : 0; for (int j = 0; j < lineAsWords.length; j++) { String word = lineAsWords[j]; if (lines == maxLines && j == lineAsWords.length - 1) { activeCanvas.drawText("...", horizontalOffset, verticalOffset, paint); } else if (j == 0) { // if it is the first word of the line, text will be drawn // starting from right edge of textview if (_align == Align.RIGHT) { activeCanvas.drawText(word, getWidth() - (getPaddingRight()), verticalOffset, paint); // add in the paddings to the horizontalOffset horizontalOffset += getWidth() - (getPaddingRight()); } else { activeCanvas.drawText(word, getPaddingLeft(), verticalOffset, paint); horizontalOffset += getPaddingLeft(); } } else { activeCanvas.drawText(word, horizontalOffset, verticalOffset, paint); } if (_align == Align.RIGHT) horizontalOffset -= paint.measureText(word) + spaceOffset + strecthOffset; else horizontalOffset += paint.measureText(word) + spaceOffset + strecthOffset; } lines++; if (blocks[i].length() > 0) { blocks[i] = blocks[i].substring(wrappedLine.length()); verticalOffset += blocks[i].length() > 0 ? horizontalFontOffset : 0; i--; } } if (cacheEnabled) { // Draw the cache onto the OS provided // canvas. canvas.drawBitmap(cache, 0, 0, paint); } } }

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package androindin.learnandroid;   /** * Created by Raj on 6/16/2016. */     import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Paint.Align; import android.graphics.Canvas; import android.graphics.Paint; import android.widget.TextView; import android.util.AttributeSet;     public class TextViewEx extends TextView {     private Paint paint = new Paint();       private String[] blocks;     private float spaceOffset = 0;     private float horizontalOffset = 0;     private float verticalOffset = 0;     private float horizontalFontOffset = 0;     private float dirtyRegionWidth = 0;     private boolean wrapEnabled = false;     int left, top, right, bottom = 0;     private Align _align = Align.LEFT;     private float strecthOffset;     private float wrappedEdgeSpace;     private String block;     private String wrappedLine;     private String[] lineAsWords;     private Object[] wrappedObj;       private Bitmap cache = null;     private boolean cacheEnabled = false;       public TextViewEx(Context context, AttributeSet attrs, int defStyle) {         super(context, attrs, defStyle);         // set a minimum of left and right padding so that the texts are not too         // close to the side screen         // this.setPadding(10, 0, 10, 0);     }       public TextViewEx(Context context, AttributeSet attrs) {         super(context, attrs);         // this.setPadding(10, 0, 10, 0);     }       public TextViewEx(Context context) {         super(context);         // this.setPadding(10, 0, 10, 0);     }       @Override     public void setPadding(int left, int top, int right, int bottom) {         // TODO Auto-generated method stub         super.setPadding(left + 10, top, right + 10, bottom);     }       @Override     public void setDrawingCacheEnabled(boolean cacheEnabled) {         this.cacheEnabled = cacheEnabled;     }       public void setText(String st, boolean wrap) {         wrapEnabled = wrap;         super.setText(st);     }       public void setTextAlign(Align align) {         _align = align;     }       @SuppressLint("NewApi")     @Override     protected void onDraw(Canvas canvas) {         // If wrap is disabled then,         // request original onDraw         if (!wrapEnabled) {             super.onDraw(canvas);             return;         }           // Active canas needs to be set         // based on cacheEnabled         Canvas activeCanvas = null;           // Set the active canvas based on         // whether cache is enabled         if (cacheEnabled) {               if (cache != null) {                 // Draw to the OS provided canvas                 // if the cache is not empty                 canvas.drawBitmap(cache, 0, 0, paint);                 return;             } else {                 // Create a bitmap and set the activeCanvas                 // to the one derived from the bitmap                 cache = Bitmap.createBitmap(getWidth(), getHeight(),                         Config.ARGB_4444);                 activeCanvas = new Canvas(cache);             }         } else {             // Active canvas is the OS             // provided canvas             activeCanvas = canvas;         }           // Pull widget properties         paint.setColor(getCurrentTextColor());         paint.setTypeface(getTypeface());         paint.setTextSize(getTextSize());         paint.setTextAlign(_align);         paint.setFlags(Paint.ANTI_ALIAS_FLAG);           // minus out the paddings pixel         dirtyRegionWidth = getWidth() - getPaddingLeft() - getPaddingRight();         int maxLines = Integer.MAX_VALUE;         int currentapiVersion = android.os.Build.VERSION.SDK_INT;         if (currentapiVersion >= android.os.Build.VERSION_CODES.JELLY_BEAN) {             maxLines = getMaxLines();         }         int lines = 1;         blocks = getText().toString().split("((?<=\n)|(?=\n))");         verticalOffset = horizontalFontOffset = getLineHeight() - 0.5f; // Temp         // fix         spaceOffset = paint.measureText(" ");           for (int i = 0; i < blocks.length && lines <= maxLines; i++) {             block = blocks[i];             horizontalOffset = 0;               if (block.length() == 0) {                 continue;             } else if (block.equals("\n")) {                 verticalOffset += horizontalFontOffset;                 continue;             }               block = block.trim();               if (block.length() == 0) {                 continue;             }               wrappedObj = TextJustifyUtils.createWrappedLine(block, paint,                     spaceOffset, dirtyRegionWidth);               wrappedLine = ((String) wrappedObj[0]);             wrappedEdgeSpace = (Float) wrappedObj[1];             lineAsWords = wrappedLine.split(" ");             strecthOffset = wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace                     / (lineAsWords.length - 1)                     : 0;               for (int j = 0; j < lineAsWords.length; j++) {                 String word = lineAsWords[j];                 if (lines == maxLines && j == lineAsWords.length - 1) {                     activeCanvas.drawText("...", horizontalOffset,                             verticalOffset, paint);                   } else if (j == 0) {                     // if it is the first word of the line, text will be drawn                     // starting from right edge of textview                     if (_align == Align.RIGHT) {                         activeCanvas.drawText(word, getWidth()                                 - (getPaddingRight()), verticalOffset, paint);                         // add in the paddings to the horizontalOffset                         horizontalOffset += getWidth() - (getPaddingRight());                     } else {                         activeCanvas.drawText(word, getPaddingLeft(),                                 verticalOffset, paint);                         horizontalOffset += getPaddingLeft();                     }                   } else {                     activeCanvas.drawText(word, horizontalOffset,                             verticalOffset, paint);                 }                 if (_align == Align.RIGHT)                     horizontalOffset -= paint.measureText(word) + spaceOffset                             + strecthOffset;                 else                     horizontalOffset += paint.measureText(word) + spaceOffset                             + strecthOffset;             }               lines++;               if (blocks[i].length() > 0) {                 blocks[i] = blocks[i].substring(wrappedLine.length());                 verticalOffset += blocks[i].length() > 0 ? horizontalFontOffset                         : 0;                 i--;             }         }           if (cacheEnabled) {             // Draw the cache onto the OS provided             // canvas.             canvas.drawBitmap(cache, 0, 0, paint);         }     } }

After that need add textview in xml like below

Java

<androindin.learnandroid.TextViewEx android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/serv" android:textColor="@color/title" android:textSize="14sp" android:paddingTop="5dp" android:breakStrategy="balanced" android:visibility="gone" />

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<androindin.learnandroid.TextViewEx         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:id="@+id/serv"         android:textColor="@color/title"         android:textSize="14sp"         android:paddingTop="5dp"         android:breakStrategy="balanced"         android:visibility="gone"         />

And in Java file add like below

TextViewEx acttext; acttext=(TextViewEx)findViewById(R.id.activ); acttext.setText(getResources().getString(R.string.activity),true);

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TextViewEx acttext;            acttext=(TextViewEx)findViewById(R.id.activ); acttext.setText(getResources().getString(R.string.activity),true);

 

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