Hab hier meinen Code, einmal die Main Activity und das andere Mal meine View Klasse. Ich übergebe den Wert "counter" vom View an meine Activity, dies kein Problem. "count" ändert sich ständig im View, in meiner Main Activity wird aber nur der Anfangswert den "count" bei der ersten Übergabe hatte übernommen, in diesem Falle 1. Meine Frage ist nun warum es diesen Wert nicht aktualisiert, denn nach jeder Touch-Berührung wird count um 1 grösser, also sollte auch der übergebene Wert um 1 grösser werden..
MainActivity:
Java
package com.example.drawproject;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.os.Build;
public class MainActivity extends Activity {
Button b1; //Gelb
Button b2; //Blau
Button b3; //Grün
Integer Pcount2 = DrawArea.getCountValue(); //get the count value
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawlayout);
DrawArea da = new DrawArea(this, null);
if(Pcount2 % 2 ==0){ //use it -> it's always the same number, instead of the increased
Intent nextScreen = new Intent(this, ChangeArea.class);
startActivity(nextScreen);
}
else{
Pcount2++;
}
}
}View Klasse
Java
package com.example.drawproject;
import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.view.MotionEvent;
import android.view.View;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class DrawArea extends View {
private List<Stroke> _allStrokes; //all strokes that need to be drawn
private SparseArray<Stroke> _activeStrokes; //use to retrieve the currently drawn strokes
private Random _rdmColor = new Random();
static int count = 1; // count ist 1
public DrawArea(Context context, AttributeSet attrs) {
super(context, attrs);
_allStrokes = new ArrayList<Stroke>();
_activeStrokes = new SparseArray<Stroke>();
setFocusable(true);
setFocusableInTouchMode(true);
}
public void onDraw(Canvas canvas) {
if (_allStrokes != null) {
for (Stroke stroke: _allStrokes) {
if (stroke != null) {
Path path = stroke.getPath();
Paint painter = stroke.getPaint();
if ((path != null) && (painter != null)) {
if(count%2 != 0){
canvas.drawPath(path, painter);
}
}
}
}
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
final int action = event.getActionMasked();
final int pointerCount = event.getPointerCount();
switch (action) {
case MotionEvent.ACTION_DOWN: {
count++; // count wird um 1 erhöht
if(count%2 != 1)
{pointDown((int)event.getX(), (int)event.getY(), event.getPointerId(0));
break;
}
if (count%2 != 0){
for (int pc = 0; pc < pointerCount; pc++) {
pointDown((int)event.getX(pc), (int)event.getY(pc), event.getPointerId(pc));
}
}
}
case MotionEvent.ACTION_MOVE: {
break;
}
case MotionEvent.ACTION_UP: {
break;
}
}
invalidate();
return true;
}
public static int getCountValue(){
int count2 = count; //count wird zur übergabe vorbereitet...
return count2;
}
private void pointDown(int x, int y, int id) {
Integer value = ChangeArea.getColorValue();
if(count%2 !=1){
//create a paint with random color
Paint paint = new Paint();
paint.setStyle(Paint.Style.STROKE);
if (value == 1){
paint.setStrokeWidth(15);
}else
if (value == 2){
paint.setStrokeWidth(20);
}else
if (value == 3){
paint.setStrokeWidth(5);
}
else{
paint.setStrokeWidth(10);
}
if (value == 1){
paint.setColor(Color.YELLOW);
}else
if (value == 2){
paint.setColor(Color.BLUE);
}else
if (value == 3){
paint.setColor(Color.GREEN);
}
else{
paint.setColor(_rdmColor.nextInt()); //Here should the values be added!
}
//create the Stroke
Point pt = new Point(x, y);
Stroke stroke = new Stroke(paint);
stroke.addPoint(pt);
_activeStrokes.put(id, stroke);
_allStrokes.add(stroke);
}
if (count%2 != 0){
//retrieve the stroke and add new point to its path
Stroke stroke = _activeStrokes.get(id);
if (stroke != null) {
Point pt = new Point(x, y);
stroke.addPoint(pt);
}
}
}
}