Codigo Main Activity
Código:
Codigo Lienzo:import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageButton;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
ImageButton negro,blanco,rojo,verde,azul;
public static Lienzo lienzo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
negro = (ImageButton) findViewById(R.id.Negro);
blanco = (ImageButton) findViewById(R.id.Blanco);
rojo = (ImageButton) findViewById(R.id.Rojo);
verde = (ImageButton) findViewById(R.id.Verde);
azul = (ImageButton) findViewById(R.id.Azul);
negro.setOnClickListener(this);
blanco.setOnClickListener(this);
rojo.setOnClickListener(this);
verde.setOnClickListener(this);
azul.setOnClickListener(this);
lienzo = (Lienzo) findViewById(R.id.lienzo);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View view) {
String color=null;
switch (view.getId()){
case (R.id.Negro):
color= view.getTag().toString();
lienzo.setColor(color);
break;
case (R.id.Blanco):
color= view.getTag().toString();
lienzo.setColor(color);
break;
case (R.id.Rojo):
color= view.getTag().toString();
lienzo.setColor(color);
break;
case (R.id.Verde):
color= view.getTag().toString();
lienzo.setColor(color);
break;
case (R.id.Azul):
color= view.getTag().toString();
lienzo.setColor(color);
break;
default:
break;
}
}
}
Código:
Codigo Layout:import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class Lienzo extends View{
//Path que utilizara para pintar las lineas
private Path drawPath;
//Paint de dibujar y paint de canvas
private Paint drawPaint,canvasPaint;
//Color inicial
private int paintColor = 0xFFFF0000;
//Canvas
private Canvas drawCanvas;
//Canvas para guardar
private Bitmap canvasBitmap;
public Lienzo(Context context, AttributeSet attrs) {
super(context, attrs);
setupDrawing();
}
private void setupDrawing(){
//Configuracion del area sobre la que va a pintar
drawPath = new Path();
drawPaint = new Paint();
drawPaint.setColor(paintColor);
drawPaint.setAntiAlias(true);
drawPaint.setStrokeWidth(20);
drawPaint.setStyle(Paint.Style.STROKE);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
canvasPaint = new Paint(Paint.DITHER_FLAG);
}
//Tamaño asignado a la vista cuando crea el objeto
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh){
super.onSizeChanged(w,h,oldw,oldh);
canvasBitmap = Bitmap.createBitmap(w,h,Bitmap.Config.ARGB_8888);
drawCanvas = new Canvas(canvasBitmap);
}
//Pinta la vista. Sera llamado desde el onTouch
@Override
protected void onDraw(Canvas canvas){
canvas.drawBitmap(canvasBitmap,0,0,canvasPaint);
canvas.drawPath(drawPath,drawPaint);
}
//Registra los Touch del usuario
@Override
public boolean onTouchEvent(MotionEvent event){
float touchX = event.getX();
float touchY = event.getY();
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
drawPath.moveTo(touchX,touchY);
break;
case MotionEvent.ACTION_MOVE:
drawPath.lineTo(touchX,touchY);
break;
case MotionEvent.ACTION_UP:
drawPath.lineTo(touchX,touchY);
drawCanvas.drawPath(drawPath,drawPaint);
drawPath.reset();
break;
default:
return false;
}
//Repintar
invalidate();
return true;
}
//Actualiza color
public void setColor (String newColor){
invalidate();
paintColor = Color.parseColor(newColor);
drawPaint.setColor(paintColor);
}
}
Código:
Desde ya gracias <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.nicolas.paint.MainActivity"
tools:showIn="@layout/activity_main">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:orientation="horizontal">
<ImageButton
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ic_stat_name" />
<ImageButton
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/trazo" />
<ImageButton
android:id="@+id/button3"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/borrar" />
<ImageButton
android:id="@+id/button4"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/guardar" />
</LinearLayout>
<view
class="com.example.nicolas.paint.Lienzo"
id="@+id/lienzo"
layout_height="0dp"
layout_weight="1"
layout_width="match_parent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="12"
android:background="#FFFFFFFF" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal">
<ImageButton
android:id="@+id/Negro"
android:layout_width="0dp"
android:layout_height="@dimen/alturacolor"
android:layout_weight="1"
android:background="#FF000000"
android:tag="#FF000000" />
<ImageButton
android:id="@+id/Blanco"
android:layout_width="0dp"
android:layout_height="@dimen/alturacolor"
android:layout_weight="1"
android:background="#FFFFFFFF"
android:tag="#FFFFFFFF" />
<ImageButton
android:id="@+id/Azul"
android:layout_width="0dp"
android:layout_height="@dimen/alturacolor"
android:layout_weight="1"
android:background="#FF0000FF"
android:tag="#FF0000FF" />
<ImageButton
android:id="@+id/Rojo"
android:layout_width="0dp"
android:layout_height="@dimen/alturacolor"
android:layout_weight="1"
android:background="#FFFF0000"
android:tag="#FFFF0000" />
<ImageButton
android:id="@+id/Verde"
android:layout_width="0dp"
android:layout_height="@dimen/alturacolor"
android:layout_weight="1"
android:background="#FF00FF00"
android:tag="#FF00FF00" />
</LinearLayout>
</LinearLayout>
