Hi,
HereI am posting code for Digital Signature.
Create Android project in that
Create MainAct.Class
package com.example.digitalsignatre;
/**
* Rahul Baradia
*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
public Canvas mCanvas;
private MyView signature;
private Button saveButton;
private Button clearButton;
// onCreate Activity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFF003F87);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
// content view
signature = new MyView(this);
// Dynamically created button on bitmap & canvas
RelativeLayout myLayout = new RelativeLayout(this);
myLayout.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
myLayout.setBackgroundColor(Color.WHITE);
// For Save Button
saveButton = new Button(this);
saveButton.setText("Save");
saveButton.setOnClickListener(this);
// For Clear Button
clearButton = new Button(this);
clearButton.setText("Clear");
clearButton.setOnClickListener(this);
myLayout.addView(signature);
myLayout.addView(saveButton);
myLayout.addView(clearButton);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100, LayoutParams.WRAP_CONTENT);
//Alignments
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
saveButton.setLayoutParams(params);
//Alignments
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(100, LayoutParams.WRAP_CONTENT);
params2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params2.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
clearButton.setLayoutParams(params2);
saveButton.bringToFront();
clearButton.bringToFront();
this.setContentView(myLayout);
new Thread(new RefreshRunner()).start();
// onclick listner for CLEAR button
clearButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//Activity for Clearing the Screen
startActivity(new Intent(MainActivity.this, MainActivity.class));
finish();
}
});
}
public Paint mPaint;
public Bitmap mBitmap;
public View view;
public Bitmap b;
public int w;
public int h;
public int Wid;
public int Ht;
public void colorChanged(int color) {
mPaint.setColor(color);
}
// Bitmap MyView
public class MyView extends View implements OnClickListener
{
public int height;
public int width;
private Bitmap mBitmap;
private Path mPath;
private Paint mBitmapPaint;
public MyView(Context c)
{
super(c);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
Wid = w;
Ht = h;
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(final Canvas canvas)
{ try{
//canvas BG color
canvas.drawColor(Color.WHITE);
canvas.drawPath(mPath, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, null);
// onclick listner for SAVE button
saveButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//capture the image
try {
//background color of Bitmap
Bitmap newBitmap = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), mBitmap.getConfig());
Canvas canvas = new Canvas(newBitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(mBitmap, 0, 0, null);
newBitmap = Bitmap.createScaledBitmap(newBitmap, 200, 150, true);
// Saving the Image
saveAsJpg(newBitmap);
} catch (IOException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
});
}catch (Exception e) {Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y)
{
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
System.out.println("---- " +mX);
}
private void touch_move(float x, float y)
{
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up()
{
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
break;
}
return true;
}
public void onClick(View v)
{
//In myView
}
}
public void onClick(View v)
{
//onCreate
}
public static final String DIRECTORY = "/sdcard";
public static String signatureImagePath = DIRECTORY+"/signature.png";
// saveAsJpg Method
public void saveAsJpg(Bitmap b) throws IOException
{
File f= new File(DIRECTORY);
if(! f.exists())
{
f.mkdir();
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream(signatureImagePath);
if(fos != null)
{
b.compress(Bitmap.CompressFormat.PNG, 100, fos );
Toast.makeText(getApplicationContext(), "Saved to External Memory", Toast.LENGTH_SHORT).show();
fos.close();
}
}catch( NullPointerException e )
{
Log.e("testSaveView", "Exception: " + e.toString() );
}
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.digitalsignatre"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
// give permission for external storage
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here is the app image
HereI am posting code for Digital Signature.
Create Android project in that
Create MainAct.Class
package com.example.digitalsignatre;
/**
* Rahul Baradia
*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
public Canvas mCanvas;
private MyView signature;
private Button saveButton;
private Button clearButton;
// onCreate Activity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFF003F87);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
// content view
signature = new MyView(this);
// Dynamically created button on bitmap & canvas
RelativeLayout myLayout = new RelativeLayout(this);
myLayout.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
myLayout.setBackgroundColor(Color.WHITE);
// For Save Button
saveButton = new Button(this);
saveButton.setText("Save");
saveButton.setOnClickListener(this);
// For Clear Button
clearButton = new Button(this);
clearButton.setText("Clear");
clearButton.setOnClickListener(this);
myLayout.addView(signature);
myLayout.addView(saveButton);
myLayout.addView(clearButton);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100, LayoutParams.WRAP_CONTENT);
//Alignments
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
saveButton.setLayoutParams(params);
//Alignments
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(100, LayoutParams.WRAP_CONTENT);
params2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params2.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
clearButton.setLayoutParams(params2);
saveButton.bringToFront();
clearButton.bringToFront();
this.setContentView(myLayout);
new Thread(new RefreshRunner()).start();
// onclick listner for CLEAR button
clearButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//Activity for Clearing the Screen
startActivity(new Intent(MainActivity.this, MainActivity.class));
finish();
}
});
}
public Paint mPaint;
public Bitmap mBitmap;
public View view;
public Bitmap b;
public int w;
public int h;
public int Wid;
public int Ht;
public void colorChanged(int color) {
mPaint.setColor(color);
}
// Bitmap MyView
public class MyView extends View implements OnClickListener
{
public int height;
public int width;
private Bitmap mBitmap;
private Path mPath;
private Paint mBitmapPaint;
public MyView(Context c)
{
super(c);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
Wid = w;
Ht = h;
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(final Canvas canvas)
{ try{
//canvas BG color
canvas.drawColor(Color.WHITE);
canvas.drawPath(mPath, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, null);
// onclick listner for SAVE button
saveButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//capture the image
try {
//background color of Bitmap
Bitmap newBitmap = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), mBitmap.getConfig());
Canvas canvas = new Canvas(newBitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(mBitmap, 0, 0, null);
newBitmap = Bitmap.createScaledBitmap(newBitmap, 200, 150, true);
// Saving the Image
saveAsJpg(newBitmap);
} catch (IOException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
});
}catch (Exception e) {Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y)
{
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
System.out.println("---- " +mX);
}
private void touch_move(float x, float y)
{
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up()
{
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
break;
}
return true;
}
public void onClick(View v)
{
//In myView
}
}
public void onClick(View v)
{
//onCreate
}
public static final String DIRECTORY = "/sdcard";
public static String signatureImagePath = DIRECTORY+"/signature.png";
// saveAsJpg Method
public void saveAsJpg(Bitmap b) throws IOException
{
File f= new File(DIRECTORY);
if(! f.exists())
{
f.mkdir();
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream(signatureImagePath);
if(fos != null)
{
b.compress(Bitmap.CompressFormat.PNG, 100, fos );
Toast.makeText(getApplicationContext(), "Saved to External Memory", Toast.LENGTH_SHORT).show();
fos.close();
}
}catch( NullPointerException e )
{
Log.e("testSaveView", "Exception: " + e.toString() );
}
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.digitalsignatre"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
// give permission for external storage
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here is the app image
