Android Code World: how can you Drawing on lyout

package com.myandroid.kidsapp
Activity Name : Drawing.java
Target set :2.1

in this application have two java file and on xml that paint.xml

no need to take any permission into manifest.xml file
//////////////////////////////////////////////////////////////////
1. Drawing .java (main activity )

public class Drawing extends Activity implements OnTouchListener {

SignaturePad paint_llayout;
LinearLayout initpad1 ;
Button Btsave,btreset ,btSave;
ImageButton tvSeeting;
private int pos;

EditText inputFileName;

final String[] items = {
"Red", "Green",
"Blue","Black"
};

String fileName;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.paint);
initpad1=(LinearLayout)findViewById(R.id.linearLayout2_paint_paint);
btreset=(Button)findViewById(R.id.btReset_paint);
btreset.setOnTouchListener(this);

btSave=(Button)findViewById(R.id.btSave_paint);
btSave.setOnTouchListener(this);

tvSeeting=(ImageButton)findViewById(R.id.img_setting_paint);
tvSeeting.setOnTouchListener(this);

// set canvas ///

setSignatureCanvas();

/////////////////

}

public boolean onTouch(View v, MotionEvent event)
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN :
switch(v.getId())
{
case R.id.btReset_paint:

break;
case R.id.btSave_paint:

break;
}
break;
case MotionEvent.ACTION_UP :
switch(v.getId())
{
case R.id.btReset_paint :
paint_llayout.discard();

break;

case R.id.img_setting_paint :

// alert Dialog for pic color Name //

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setIcon(R.drawable.piccolor_sml);
builder.setTitle("Pick a color");

builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int item)
{
pos=item;
SignaturePad.mPaint.setColor(0xFF000000);
Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
}}).setPositiveButton("Ok", new OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {

//* set color value as per select * //

if(items[pos].equalsIgnoreCase("Red"))
{

SignaturePad.mPaint.setColor(0xFFaa0000);
}
else if(items[pos].equalsIgnoreCase("Green"))
{
SignaturePad.mPaint.setColor(0xFF00aa00);
}
else if(items[pos].equalsIgnoreCase("Blue"))
{
SignaturePad.mPaint.setColor(0xFF0000aa);
}
else if(items[pos].equalsIgnoreCase("Black"))
{
SignaturePad.mPaint.setColor(0xFF000000);
}
else
{
SignaturePad.mPaint.setColor(0xFF000000);
}

}
}).setNegativeButton("Cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.show();

break;

case R.id.btSave_paint:

AlertDialog.Builder alert1 = new AlertDialog.Builder(this);
alert1.setTitle(" Save ");
alert1.setMessage("Put file name ");
alert1.setIcon(R.drawable.save_sml);

// Set an EditText view to get user input

inputFileName= new EditText(this);

alert1.setView(inputFileName);

alert1.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

fileName=inputFileName.getText().toString();

if(fileName==null)
{
paint_llayout.save("default.PNG");
Toast.makeText(Drawing.this, "you must provied file name ? ", Toast.LENGTH_LONG).show();
}
else
{
paint_llayout.save(fileName+".PNG");
Toast.makeText(Drawing.this, " file "+fileName, Toast.LENGTH_LONG).show();
}

}
});

alert1.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

}
});

alert1.show();

break;
}
break;

}

return false;

}

private void setSignatureCanvas() {

paint_llayout = new SignaturePad(Drawing.this);
initpad1.addView(paint_llayout.getSignaturePad());

}

////////////////////////////////////////////////////////////////
2.SignaturePad.java

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

public class SignaturePad extends View {

Context _context;
public static Paint mPaint;
@SuppressWarnings("unused")
private MaskFilter mEmboss;
@SuppressWarnings("unused")
private MaskFilter mBlur;
private String filename;

private View v1;
MyView v;
private String storagePath = Environment.getExternalStorageDirectory().toString();

public SignaturePad(Context context) {
super(context);
_context = context;
v = new MyView(context);
v1 = v.getRootView();

mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xFF000000);

// mPaint.setColor(0xFFaa0000);

mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(12);
mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
0.4f, 6, 3.5f);
mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);

}

public View getSignaturePad()
{
//filename=filename1;
return v;
}

public void colorChanged(int color) {
mPaint.setColor(color);
}
public void discard(){
//mPaint.setARGB(0xff,125,125,125);
//v.mCanvas.drawPaint(mPaint);
v.mBitmap.eraseColor(0xFFAAAAAA);
v.invalidate();
}

public class MyView extends View {

@SuppressWarnings("unused")
private static final float MINP = 0.25f;
@SuppressWarnings("unused")
private static final float MAXP = 0.75f;

private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;

public MyView(Context c,int col) {
super(c);

mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}

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);
if(w > 0 && h > 0){
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
}

@Override
protected void onDraw(Canvas canvas) {
// set backround color//
canvas.drawColor(0xFFAAAAAA);

canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);

canvas.drawPath(mPath, mPaint);
}

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;
}
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 save(String fName){

filename=fName;

System.out.println("Root View : "+v1);
v1.setDrawingCacheEnabled(true);
Bitmap bm = v1.getDrawingCache();
System.out.println("Bitmap : "+bm);
// String filename = "sign.png";
try {
OutputStream fOut = null;
File file = new File(storagePath, filename);
fOut = new FileOutputStream(file);
if(bm != null)
bm.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();
MediaStore.Images.Media.insertImage(_context.getContentResolver(), file
.getAbsolutePath(), file.getName(), file.getName());
} catch (FileNotFoundException e) {
Toast.makeText(_context,
"Exception at save: File not found" + e.getMessage(),
Toast.LENGTH_SHORT).show();
} catch (IOException e) {
Toast.makeText(_context,
"Exception at save: IO stream error" + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
//Toast.makeText(_context, "Saved to: " + storagePath + "/" + filename,
//Toast.LENGTH_SHORT).show();

}

}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
And main.xml file is :
in this case it is paint.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="79dp"
android:orientation="horizontal" >

<Button
android:id="@+id/btReset_paint"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.02"
android:text="Reset"
android:visibility="visible" />

<ImageButton
android:id="@+id/img_setting_paint"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.02"
android:background="#000000"
android:text="Setting"
android:visibility="visible" android:src="@drawable/piccolor"/>

<Button
android:id="@+id/btSave_paint"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.03"
android:text="Save"/>

</LinearLayout>

<LinearLayout
android:id="@+id/linearLayout2_paint_paint"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.08"
android:background="#ffffff"
android:orientation="vertical" >

</LinearLayout>

</LinearLayout>

/////////////////////////////////////////////////////////////////////////////////////////////////////////

now you can run the aaplication .................

Android Code World

how can you Drawing on lyout

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