android črta

Kaj pa ti napiše v "LogCat"?

Ali ti to sploh prav prevede? Ker meni se zdi da je napaka v konstrukturju "Drawing" razreda...

[2012-08-31 19:45:29 - pii] Installation error: INSTALL_FAILED_INSUFFICIENT_STORAGE
[2012-08-31 19:45:29 - pii] Please check logcat output for more details.
[2012-08-31 19:45:29 - pii] Launch canceled!

Končno dobil sori k ste me čakal :((

Kodo sem spremenil...pa po moje je zaradi gumbeka k sem ga dodal..

package com.example.pii;


import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class DrawView extends View implements OnTouchListener {
    private static final String TAG = "DrawView";

    List<Point> points = new ArrayList<Point>();
    Paint paint = new Paint();

    public DrawView(Context context) {
        super(context);
        setFocusable(true);
        setFocusableInTouchMode(true);

        this.setOnTouchListener(this);

        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }

    @Override
    public void onDraw(Canvas canvas) {
        for (Point point : points) {
            canvas.drawCircle(point.x, point.y, 5, paint);
            // Log.d(TAG, "Painting: "+point);
        }
    }

    public boolean onTouch(View view, MotionEvent event) {
        // if(event.getAction() != MotionEvent.ACTION_DOWN)
        // return super.onTouchEvent(event);
        Point point = new Point();
        point.x = event.getX();
        point.y = event.getY();
        points.add(point);
        invalidate();
        Log.d(TAG, "point: " + point);
        return true;
    }
}

class Point {
    float x, y;

    @Override
    public String toString() {
        return x + ", " + y;
    }
}

package com.example.pii;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;

public class Draw extends Activity {
    DrawView drawView;
    Button knof;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set full screen view
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                         WindowManager.LayoutParams.FLAG_FULLSCREEN);
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        drawView = new DrawView(this);
        setContentView(drawView);
        drawView.requestFocus();
        knof=(Button)findViewById(R.id.button1);
        knof.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				
			}
		});
        
    }
}

Sicer sem resil problem ampak imam pa vprašanje, kako naredim da bom lahko risal pike sem :

setContentView(R.layout.activity_main); 

in ne

setContentView(drawview);

tukaj rišem..

Če uporabljaš custom view v xml-ju, moraš v tem view-u implemenitrat pravilen konstruktor (najbolje da kar vse). Če pogledaš ostale View-e (subclasse) vidiš, da imajo vsi konstruktor, ki dobi not še parameter attrs, tako da dodaj še ta konstrukotr:

public DrawView(Context context) {
        super(context);
        setFocusable(true);
        setFocusableInTouchMode(true);
 
        this.setOnTouchListener(this);
 
        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }

public DrawView(Context context, AttributeSet attrs) {
        super(context);
        setFocusable(true);
        setFocusableInTouchMode(true);
 
        this.setOnTouchListener(this);
 
        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }

Ekola takole sem spremenil pa mi se crasha aplikacija..

   drawView = new DrawView(this, null, 0);
    setContentView(drawView);
    drawView.requestFocus();

   public DrawView(Context context, AttributeSet attrs, int defStyle) {

sej sem ga..takole:
sem prekopiral sam zgleda je ena napaka tam :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/crna"
   >
    <com.package.DrawView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="@string/shrani" />

</RelativeLayout>

com.package.DrawView - to spremen glede na to kje maš ti DrawView shranjen v projektu, pa dodaj še id, tko k maš za knof

Pa nism zihr če lahko to nardiš z RelativeLayout, najbrž bo treba zamenjat s FrameLayout. Sprobej pa povej.

Edit: narobe kličeš super(), poklicat ga morš s parametri:

super(context, attrs, defStyle);

A si ti že kdaj prej delal v Androidu, al s tem šele začenjaš? Ker mislim da moraš najprej pokapirat osnove... Poglej si tole knjigo: Hello, Android

Bo pa treba logcat pogledat za napako. Možn da ne pusti met dvakrat

xmlns:android1="http://schemas.android.com/apk/res/android"

Edit: nekje sred ti piše: Caused by: java.lang.NoSuchMethodException: DrawView(Context,AttributeSet)

A maš vse 3 konstruktorje?

Ja sicer sem vse na nul nastavu,ker ne vem zakj smo dodali spremenljivke,.. :

drawView = new DrawView(this, null, 0);
   setContentView(R.layout.main_action);
   drawView.requestFocus();

public class DrawView extends View implements OnTouchListener {
    private static final String TAG = "DrawView";

    List<Point> points = new ArrayList<Point>();
    Paint paint = new Paint();

    public DrawView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setFocusable(true);
        setFocusableInTouchMode(true);

        this.setOnTouchListener(this);

        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }

    @Override
    public void onDraw(Canvas canvas) {
        for (Point point : points) {
            canvas.drawCircle(point.x, point.y, 5, paint);
            // Log.d(TAG, "Painting: "+point);
        }
    }

    public boolean onTouch(View view, MotionEvent event) {
        // if(event.getAction() != MotionEvent.ACTION_DOWN)
        // return super.onTouchEvent(event);
        Point point = new Point();
        point.x = event.getX();
        point.y = event.getY();
        points.add(point);
        invalidate();
        Log.d(TAG, "point: " + point);
        return true;
    }
}

class Point {
    float x, y;

    @Override
    public String toString() {
        return x + ", " + y;
    }
}

Ah dej no, a nč ne bereš :)
Rabš 3 konstruktorje. Ti maš samo enga. Dodej:

public DrawView(Context context) {
        super(context);
        setFocusable(true);
        setFocusableInTouchMode(true);
 
        this.setOnTouchListener(this);
 
        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }
 
public DrawView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setFocusable(true);
        setFocusableInTouchMode(true);
        this.setOnTouchListener(this);
        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
    }

Sicer pa bo najbolš da pogledaš kaj ti je predlagu Marat.

Sem sprobal to kodo in mi deluje brez problema, si res dodal vse 3 konstruktorje? ker v kodi zgoraj imaš samo enega, moraš pa dodat vse!

public class DrawView extends View implements OnTouchListener {
	private static final String TAG = "DrawView";

	List<Point> points = new ArrayList<Point>();
	Paint paint = new Paint();

	public DrawView(Context context) {
		this(context, null, 0);
	}

	public DrawView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public DrawView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		setFocusable(true);
		setFocusableInTouchMode(true);

		this.setOnTouchListener(this);

		paint.setColor(Color.RED);
		paint.setAntiAlias(true);
	}

	@Override
	public void onDraw(Canvas canvas) {
		for (Point point : points) {
			canvas.drawCircle(point.x, point.y, 5, paint);
			// Log.d(TAG, "Painting: "+point);
		}
	}

	public boolean onTouch(View view, MotionEvent event) {
		// if(event.getAction() != MotionEvent.ACTION_DOWN)
		// return super.onTouchEvent(event);
		Point point = new Point();
		point.x = event.getX();
		point.y = event.getY();
		points.add(point);
		invalidate();
		Log.d(TAG, "point: " + point);
		return true;
	}
}

class Point {
	float x, y;

	@Override
	public String toString() {
		return x + ", " + y;
	}
}

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android1="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000" >

    <com.example.pii.DrawView
        android:id="@+id/DrawView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="shrani" />

</FrameLayout>

tud kle deluje setContentView na oba načina:

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        
//        DrawView drawing= new DrawView(this);
//        setContentView(drawing);
        
        setContentView(R.layout.activity_main);
        
    }
    
}

mal prepozno sm postal :D

3 konstruktorje rabiš, če uporabljaš DrawView v xml-ju, v tem primeru android sam naredi novo instanco DrawViewa in uporabi tisti konstruktor, ki ustreza argumentom v xmlju, ponavadi tistega z dvemi ali tremi argumenti, zato rabiš vse 3.

this je referenca classa samega nase, v konstuktorju se ga ponavadi uporabi, da kličeš drug konstruktor z drugimi parametri, da ti ni treba v vsakem podvajati kode. Drugače pa upam da veš za kaj vse se uporablja this in super, če ne, si preberi, ker to je osnova jave :)

Ekola takole sem sedaj naredil, pa me zanima, kako se da shranjevati slike..

Sicer ali naj naredim tako da se sporotno shranjuje ali pa vse na koncu naenkkrat, kot sem gledal kodo bo moj knof za okras ker sem ga deklariral pri oncreate vendar imam class za risanje na novi strani..

a potem mi ni potrebno shranjevati, tako kot mi je illion priporočal.

Je počasno valda, ker za vsako piko rišeš v file! nared drugo funckijo recimo saveImage in tam notr shran sliko, poleg tega ni nujno da imajo vsi androidi kartico mountano na /mnt/sdcard, zato uporab Environment.getExternalStorageDirectory();

public void saveImage(Canvas c) {
       File file= Environment.getExternalStorageDirectory() + "/arun.jpg";
       

      try {
          getDrawingCache().compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(dir));
      } catch (Exception e) {
          Log.e("Error--------->", e.toString());
      }
  }

potem pa na save button click kliči saveImage();

Mal se potrud, pa poglej dokumentacijo.
Glede polne črte: med prejšnjo točko in novo črto nariš daljico.
Glede kvadratov itd maš vse tuki: klik

Hvala sicer sem pa jaz zelo napredoval imam pa spet problem, tako kot je ze standard pri programiranju :PPP
Odločil sem se da ne bom več risal po p objektu in da bom risal R.layout.prvi:Vendar me vedno razbije apliakcija:
Nalimal sem le izvlečke iz kode, če kdo potrebuje kaj mi naj pove :P

09-06 18:20:23.613: D/dalvikvm(328): GC freed 588 objects / 49456 bytes in 598ms
09-06 18:20:23.653: D/AndroidRuntime(328): Shutting down VM
09-06 18:20:23.663: W/dalvikvm(328): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
09-06 18:20:23.663: E/AndroidRuntime(328): Uncaught handler: thread main exiting due to uncaught exception
09-06 18:20:23.683: E/AndroidRuntime(328): java.lang.RuntimeException: Unable to start activity ComponentInfo{somitsolutions.training.android.androidpaint/somitsolutions.training.android.androidpaint.AndroidPaint}: android.view.InflateException: Binary XML file line #7: Error inflating class somitsolutions.training.android.androidpaint.AndroidPaint
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.os.Handler.dispatchMessage(Handler.java:99)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.os.Looper.loop(Looper.java:123)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread.main(ActivityThread.java:4363)
09-06 18:20:23.683: E/AndroidRuntime(328): at java.lang.reflect.Method.invokeNative(Native Method)
09-06 18:20:23.683: E/AndroidRuntime(328): at java.lang.reflect.Method.invoke(Method.java:521)
09-06 18:20:23.683: E/AndroidRuntime(328): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
09-06 18:20:23.683: E/AndroidRuntime(328): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
09-06 18:20:23.683: E/AndroidRuntime(328): at dalvik.system.NativeStart.main(Native Method)
09-06 18:20:23.683: E/AndroidRuntime(328): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class somitsolutions.training.android.androidpaint.AndroidPaint
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.createView(LayoutInflater.java:503)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
09-06 18:20:23.683: E/AndroidRuntime(328): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.Activity.setContentView(Activity.java:1622)
09-06 18:20:23.683: E/AndroidRuntime(328): at somitsolutions.training.android.androidpaint.AndroidPaint.onStart(AndroidPaint.java:179)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.Activity.performStart(Activity.java:3723)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)
09-06 18:20:23.683: E/AndroidRuntime(328): ... 11 more
09-06 18:20:23.683: E/AndroidRuntime(328): Caused by: java.lang.NoSuchMethodException: AndroidPaint(Context,AttributeSet)
09-06 18:20:23.683: E/AndroidRuntime(328): at java.lang.Class.getMatchingConstructor(Class.java:674)
09-06 18:20:23.683: E/AndroidRuntime(328): at java.lang.Class.getConstructor(Class.java:486)
09-06 18:20:23.683: E/AndroidRuntime(328): at android.view.LayoutInflater.createView(LayoutInflater.java:475)
09-06 18:20:23.683: E/AndroidRuntime(328): ... 22 more
09-06 18:20:23.723: I/dalvikvm(328): threadid=7: reacting to signal 3
09-06 18:20:23.723: E/dalvikvm(328): Unable to open stack trace file '/data/anr/traces.txt': Permission denied


koda

package somitsolutions.training.android.androidpaint;
public class AndroidPaint extends Activity {
    public void onStart(){
    	super.onStart();
    	//p.surfaceCreated(p.getHolder());
    	p = new Panel(this);
      //  setContentView(p/*new Panel(this)*/);
        setContentView(R.layout.prva);
       p=(Panel)findViewById(R.id.DrawView);
        		// mView =(TesterView) findViewById (R.id.DrawView);
        
    	//setContentView(p); <-- deluje odlično 
    
         }*/
        /* int n = graphicobjects.size();
         if (getLastNonConfigurationInstance() != null)
         {
         	//GraphicObject = (Shape)getLastNonConfigurationInstance();
         	//graphicobjects.set(number_of_graphicObjects-1, (Shape)getLastNonConfigurationInstance());
         	//graphicobjects.addAll((Shape)getLastNonConfigurationInstance());
        	 Object[] temp = getLastNonConfigurationInstance();
         	for(int i = 0; i<n; i++){
         		graphicobjects.set(i,(Shape)getLastNonConfigurationInstance());
         	}
         }*/
    }
}
    
public class Panel extends SurfaceView implements SurfaceHolder.Callback {
}

xml koda

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

   <somitsolutions.training.android.androidpaint.AndroidPaint
             android:id="@+id/DrawView"
             android:layout_width="fill_parent"
            android:layout_height="fill_parent"
             />
       
  

</RelativeLayout>

emm ja če misliš clasa panel in androidpaint sta skupaj v 1 androidpain.java.