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POHow to increment Canvas Text in Android App?
 

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  1. POHow to increment Canvas Text in Android App?
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    <p>How's it going guys. What I'm trying to do right now is increment this canvas text I have on the screen right now. I have a bitmap on the canvas that should will increment the number every time it is clicked. I printed the variable to the logcat and it is indeed incrementing but it's not being drawn on the screen. </p> <p>Here's a picture of what I have now for better idea:</p> <p><img src="https://i.stack.imgur.com/mvUs1.png" alt="enter image description here"></p> <p>Here's my drawing class:</p> <pre><code>package com.example.touchperson; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.util.Log; import android.view.View; public class Drawing extends View { Bitmap robot; Rect rec; Paint text; static int touchCount = 0; public Drawing(Context context) { super(context); robot = BitmapFactory.decodeResource(getResources(), R.drawable.character); Log.i("Robot coord", Integer.toString(robot.getHeight()));; rec = new Rect(0, 0, 200 , 200); text = new Paint(); text.setColor(Color.CYAN); text.setTextSize(100); } public boolean contains(int x, int y){ if(rec.contains(x, y)){ return true; } else{ return false; } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawColor(Color.WHITE); canvas.drawBitmap(robot, rec, rec, null); canvas.drawText(Integer.toString(touchCount) ,(int) (canvas.getWidth()/2) , (int) (canvas.getHeight()/2), text); } } </code></pre> <p>Here's my main activity class:</p> <pre><code>package com.example.touchperson; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; public class MainActivity extends Activity implements OnTouchListener { Drawing view; Drawing count; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); view = new Drawing(this); view.setOnTouchListener(this); setContentView(view); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } @Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub switch(event.getAction()){ case MotionEvent.ACTION_DOWN: if(view.contains((int) event.getX(), (int) event.getY())){ Drawing.touchCount++; count = new Drawing(this); Log.i("touched", Integer.toString(Drawing.touchCount)); } break; } return false; } } </code></pre> <p>Any help would be much appreciated.</p>
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    1. USrecheej
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    1. COYou've used your `view` instance of `Drawing` with `setContentView(...)` but in the `onTouch(...)` listener you use `count = new Drawing(this);`. What makes you think that would update the screen?
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      1. POHow to increment Canvas Text in Android App?
      1. USSquonk
    2. COGood point. I was just trying any thing I could. Have any suggestions on how to update the view?
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      1. POHow to increment Canvas Text in Android App?
      1. USrecheej
 

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