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POhow can i change the color of my paint brush on button click from the color palette android
 

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  1. POhow can i change the color of my paint brush on button click from the color palette android
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    <p>I am working on a basic paint app which has a color palette. Whenever i select a color the brush color should change. Currently the issue with my program is that on changing the color, my existing drawing color also changes to the present color. Thus, I cannot make a drawing with different colors. I finally get an image with the last color selected. I have given my code below.</p> <p>Drawing.java</p> <pre><code>public class Drawing extends Activity { Paint fgPaintSel; public int height,width,i=0,counter=0; boolean flag=true; String image; Button bClear,bErase,bSave,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10; //int check=0; Canvas c; TextView tvAlpha; LinearLayout draw; //private DrawingManager mDrawingManager=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.drawing); LinearLayout ll = (LinearLayout)findViewById(R.id.draw); final DrawPanel drawingPanel = new DrawPanel(getApplicationContext()); ll.addView(drawingPanel); bClear=(Button) findViewById(R.id.bCLear1); bErase=(Button) findViewById(R.id.bErase); bSave=(Button) findViewById(R.id.bSave); b1=(Button) findViewById(R.id.b1); b2=(Button) findViewById(R.id.b2); b3=(Button) findViewById(R.id.b3); b4=(Button) findViewById(R.id.b4); b5=(Button) findViewById(R.id.b5); b6=(Button) findViewById(R.id.b6); b7=(Button) findViewById(R.id.b7); b8=(Button) findViewById(R.id.b8); b9=(Button) findViewById(R.id.b9); b10=(Button) findViewById(R.id.b10); b1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.BLACK); } }); b2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(51,181,229)); } }); b3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(153,51,204)); } }); b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { drawingPanel.paint.setColor(Color.rgb(204, 255, 0 )); } }); b5.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(255, 68, 68 )); } }); b6.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(204, 0, 0)); } }); b7.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(153, 204, 0)); } }); b8.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(253, 238, 0)); } }); b9.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb(255, 145, 175 )); } }); b10.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.rgb( 139, 0, 139)); } }); bErase.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub drawingPanel.paint.setColor(Color.WHITE); } }); } public class DrawPanel extends View { public DrawPanel(Context context) { super(context); points = new ArrayList(); strokes = new ArrayList(); paint = createPaint(Color.BLACK, 8); } @Override public void onDraw(Canvas c){ super.onDraw(c); this.setBackgroundColor(Color.WHITE); for(Object obj: strokes){ drawStroke((ArrayList)obj, c); } drawStroke(points, c); //c.drawLine((width/2),height,(width/2),0,fgPaintSel); } @Override public boolean onTouchEvent(MotionEvent event){ if(event.getActionMasked() == MotionEvent.ACTION_MOVE){ points.add(new Point((int)event.getX(), (int)event.getY())); invalidate(); } if(event.getActionMasked() == MotionEvent.ACTION_UP){ this.strokes.add(points); points = new ArrayList(); } return true; } private void drawStroke(ArrayList stroke, Canvas c){ /**/ if (stroke.size() &gt; 0) { Point p0 = (Point)stroke.get(0); for (int i = 1; i &lt; stroke.size(); i++) { Point p1 = (Point)stroke.get(i); c.drawLine(p0.x, p0.y, p1.x, p1.y, paint); p0 = p1; } } } private Paint createPaint(int color, float width){ Paint temp = new Paint(); temp.setStyle(Paint.Style.STROKE); temp.setAntiAlias(true); temp.setColor(color); temp.setStrokeWidth(width); temp.setStrokeCap(Cap.ROUND); return temp; } private Paint paint; private ArrayList points; private ArrayList strokes; } } </code></pre> <p>drawing.xml</p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/drawPanel1"&gt;" &lt;LinearLayout android:layout_width="fill_parent" android:layout_height="30sp" android:orientation="horizontal" android:weightSum="100"&gt; &lt;Button android:id="@+id/b1" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#000000" /&gt; &lt;Button android:id="@+id/b2" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#33B5E5" /&gt; &lt;Button android:id="@+id/b3" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#9933CC" /&gt; &lt;Button android:id="@+id/b4" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#CCFF00" /&gt; &lt;Button android:id="@+id/b5" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#FF4444" /&gt; &lt;Button android:id="@+id/b6" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#CC0000" /&gt; &lt;Button android:id="@+id/b7" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#99CC00" /&gt; &lt;Button android:id="@+id/b8" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#FDEE00" /&gt; &lt;Button android:id="@+id/b9" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#FF91AF" /&gt; &lt;Button android:id="@+id/b10" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="10" android:background="#8B008B" /&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:layout_width="fill_parent" android:layout_height="35sp" android:orientation="horizontal" android:weightSum="100" &gt; &lt;Button android:id="@+id/bErase" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="33" android:text="ERASE" android:layout_gravity="center" android:gravity="center" android:textSize="10sp" /&gt; &lt;Button android:id="@+id/bCLear1" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="33" android:text="CLEAR" android:layout_gravity="center" android:gravity="center" android:textSize="10sp" /&gt; &lt;Button android:id="@+id/bSave" android:layout_width="fill_parent" android:layout_height="30sp" android:layout_weight="33" android:text="SAVE" android:layout_gravity="center" android:gravity="center" android:textSize="10sp" android:layout_marginRight="10sp" /&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" android:id="@+id/draw"&gt;&lt;/LinearLayout&gt; &lt;/LinearLayout&gt; </code></pre>
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