How to align a text in Android Programatically?

This is a simple demo on aligning a text in Android. You can check out for more details at the developers site.
This code explains how to write a String or text on a canvas and how to give it a custom font or inbuilt font programatically, change the color of the text or canvas or change the size of the text etc.
Check out this example. You don’t need a layout for this since the view is created in the java code itself.
Now go on and copy the code into your project and you are done.

 package pack.coderzheaven;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Path;

import android.graphics.Typeface;

import android.os.Bundle;

import android.view.View;

public class TextAlignDemo extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(new SampleView(this));

}

private static class SampleView extends View {

private Paint   mPaint;

private float   mX;

private float[] mPos;

private Path    mPath;

private Paint   mPathPaint;

private static final int DY = 30;

private static final String TEXT_L = "Left";

private static final String TEXT_C = "Center";

private static final String TEXT_R = "Right";

private static final String POSTEXT = "Positioned";

private static final String TEXTONPATH = "Along a path";

private static void makePath(Path p) {

p.moveTo(10, 0);

p.cubicTo(100, -50, 200, 50, 300, 0);

}

private float[] buildTextPositions(String text, float y, Paint paint) {

float[] widths = new float1;

// initially get the widths for each char

int n = paint.getTextWidths(text, widths);

// now popuplate the array, interleaving spaces for the Y values

float[] pos = new float[n * 2];

float accumulatedX = 0;

for (int i = 0; i < n; i++) {

pos[i*2 + 0] = accumulatedX;

pos[i*2 + 1] = y;

accumulatedX += widths[i];

}

return pos;

}

public SampleView(Context context) {

super(context);

setFocusable(true);

mPaint = new Paint();

mPaint.setAntiAlias(true);

mPaint.setTextSize(30);

mPaint.setTypeface(Typeface.SERIF);

mPos = buildTextPositions(POSTEXT, 0, mPaint);

mPath = new Path();

makePath(mPath);

mPathPaint = new Paint();

mPathPaint.setAntiAlias(true);

mPathPaint.setColor(0x800000FF);

mPathPaint.setStyle(Paint.Style.STROKE);

}

@Override protected void onDraw(Canvas canvas) {

canvas.drawColor(Color.WHITE);

Paint p = mPaint;

float x = mX;

float y = 0;

float[] pos = mPos;

// draw the normal strings

p.setColor(0x80FF0000);

canvas.drawLine(x, y, x, y+DY*3, p);

p.setColor(Color.BLACK);

canvas.translate(0, DY);

p.setTextAlign(Paint.Align.LEFT);

canvas.drawText(TEXT_L, x, y, p);

canvas.translate(0, DY);

p.setTextAlign(Paint.Align.CENTER);

canvas.drawText(TEXT_C, x, y, p);

canvas.translate(0, DY);

p.setTextAlign(Paint.Align.RIGHT);

canvas.drawText(TEXT_R, x, y, p);

canvas.translate(100, DY*2);

// now draw the positioned strings

p.setColor(0xBB00FF00);

for (int i = 0; i < pos.length/2; i++) {

canvas.drawLine(pos[i*2+0], pos[i*2+1]-DY,

pos[i*2+0], pos[i*2+1]+DY*2, p);

}

p.setColor(Color.BLACK);

p.setTextAlign(Paint.Align.LEFT);

canvas.drawPosText(POSTEXT, pos, p);

canvas.translate(0, DY);

p.setTextAlign(Paint.Align.CENTER);

canvas.drawPosText(POSTEXT, pos, p);

canvas.translate(0, DY);

p.setTextAlign(Paint.Align.RIGHT);

canvas.drawPosText(POSTEXT, pos, p);

// now draw the text on path

canvas.translate(-100, DY*2);

canvas.drawPath(mPath, mPathPaint);

p.setTextAlign(Paint.Align.LEFT);

canvas.drawTextOnPath(TEXTONPATH, mPath, 0, 0, p);

canvas.translate(0, DY*1.5f);

canvas.drawPath(mPath, mPathPaint);

p.setTextAlign(Paint.Align.CENTER);

canvas.drawTextOnPath(TEXTONPATH, mPath, 0, 0, p);

canvas.translate(0, DY*1.5f);

canvas.drawPath(mPath, mPathPaint);

p.setTextAlign(Paint.Align.RIGHT);

canvas.drawTextOnPath(TEXTONPATH, mPath, 0, 0, p);

}

@Override

protected void onSizeChanged(int w, int h, int ow, int oh) {

super.onSizeChanged(w, h, ow, oh);

mX = w * 0.5f;  // remember the center of the screen

}

}

}

TextAlign Demo