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POOnly one view is displayed in Android
 

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  1. POOnly one view is displayed in Android
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    <p>I am new to Android. When i run this code, only one circle is displayed. If i remove view1, then view2 is displayed. but they are never displayed together!!! why is that? Any help would be appreciated.</p> <p>thanks</p> <pre><code>package com.dots; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class Dots1Activity extends Activity { private static final String TAG = "DotsActivity"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout ll = new LinearLayout(this); ll.setOrientation(LinearLayout.HORIZONTAL); TextView label = new TextView(this); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); label.setText("Click the circle!"); CustomDrawableView view1 = new CustomDrawableView(this, 100, 100, 50, Color.RED); CustomDrawableView view2 = new CustomDrawableView(this, 200, 200, 25, Color.GREEN); CustomDrawableView view3 = new CustomDrawableView(this, 300, 300, 10, Color.WHITE); ll.addView(label, layoutParams); ll.addView(view1, layoutParams); ll.addView(view2, layoutParams); ll.addView(view3, layoutParams); setContentView(ll); } } class CustomDrawableView extends View implements OnClickListener{ private Context context; private int x, y, radius, color; public CustomDrawableView(Context context, int x, int y, int radius, int color) { super(context); this.context = context; this.x = x; this.y =y; this.radius = radius; this.color = color; setOnClickListener(this); } protected void onDraw(Canvas canvas) { super.onDraw(canvas); this.setBackgroundColor(Color.LTGRAY); Paint paint = new Paint (Paint.ANTI_ALIAS_FLAG); paint.setColor(color); canvas.drawCircle(x, y, radius, paint); } public void onClick(View v) { Toast.makeText(this.context, x+"-"+y+"-"+radius, Toast.LENGTH_SHORT).show(); } } </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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