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POMultiple instances of a view object within an android activity
 

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  1. POMultiple instances of a view object within an android activity
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    <p>I have two custom view objects that are created within an activity like so.</p> <pre><code>public class Statistics extends Activity { GraphWindow graph1; GraphWindow graph2; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.statistics); graph1 = (GraphWindow) findViewById(R.id.graph1); graph2 = (GraphWindow) findViewById(R.id.graph2); ... } </code></pre> <p>However they seem to be acting as one instance, so a public method to graph1 will also be executed on graph 2. Do I need to initiate each graph view as a new instance somehow? Where would I do this? </p> <p><strong>EDIT</strong></p> <p>Here is the (condensed) GraphWindow Class:</p> <pre><code>public class GraphWindow extends View { //draw data public ArrayList&lt;DataPoint&gt; data = new ArrayList&lt;DataPoint&gt;(); //set height public int graphHeight = 0; public int indexStart = 0; public int indexFinish = 0; public boolean isTouched = false; public boolean isDraggable = false; public GraphWindow(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public GraphWindow(Context context, AttributeSet attrs) { super(context, attrs); } public GraphWindow(Context context) { super(context); } public void setGraphHeight(int graphHeight) { this.graphHeight = graphHeight; } public void isDraggable(boolean isDraggable) { this.isDraggable = isDraggable; } public void panBox(MotionEvent event) { rectX = (int)event.getX(); rectW = this.getWidth()/5 + rectX; this.postInvalidate(); } public void clearData() { this.data.clear(); } @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); ... } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { ... } } </code></pre> <p>In particular the clear data method will operate on both graph1 and graph2.</p>
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    1. USAlex
    1. USAlex
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    1. COI think you may need to edit the code above a little. graph1 and graph2 are never initialized and "window" and "graph" are never properly declared? Is this a typo?
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      1. USGraham Smith
    2. COAlso, where is the GraphWindow class coming from? I doesn't seem to be standard Android
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      1. POMultiple instances of a view object within an android activity
      1. USdstricks
    3. COI am new to java/android so no doubt I have made some rookie mistakes. I was unsure whether to initiate graph1 & graph2 in the field or in the onCreate and ended up doing neither and they still seem to be visible... GraphWindow is my own class that extends view. I will add this to the question
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      1. POMultiple instances of a view object within an android activity
      1. USAlex
 

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