title: android: LayoutParams for TextView makes the view disappear, programmatically
body: <p>I've hit this from various different angles.  Basically the gist is this:</p>
  
  <p>I've layed out a template in XML for an interface which NEEDS to be run programmatically, so it's going to be populated dynamically during the run.</p>
  
  <p>The problem here, is that the XML TextView has quite a few layout tweaks (which work) and are necessary.  But if I actually set them in code, the TextView doesn't even show up.</p>
  
  <p>(The TextView, by the way, is nested inside a TableRow, thus the call to weight.) 
  The XML template I designed first, to use as reference for the code is this, and it works just fine:</p>
  
  <pre><code>&lt;TextView
    android:id="@+id/txtviewWhiteBox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="1.0"
    android:background="@drawable/textview_9patch_white"
    android:gravity="center"
    android:text="75"
    android:textColor="@android:color/black"
    android:layout_margin="20dp"
    android:padding="20dp"
    android:textSize="40dp" /&gt;
  </code></pre>
  
  <p>Like I said, that lays out perfectly.
  When I run the same layout in code though, and apply LayoutParams, the TextView disappears.</p>
  
  <p>Here's the relevant snippet:</p>
  
  <pre><code>int textViewExampleID = 9001;
  
  private TextView txtviewExample = new TextView(this);
  
  private void buildTextView(){   
      LayoutParams paramsExample = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,1.0f);
      txtviewExample.setId(textViewExampleID);
      txtviewExample.setBackgroundResource(R.drawable.textview_9patch_white);
      txtviewExample.setGravity(Gravity.CENTER);
      txtviewExample.setTextColor(getResources().getColor(android.R.color.black));
      paramsExample.setMargins(20, 20, 20, 20);
      txtviewExample.setPadding(20, 20, 20, 20);
      txtviewExample.setTextSize(40); 
      txtviewExample.setText("customExample");
  
      //if I comment out the following line, this TextView displays.
      //if I leave it in, it doesn't display.
      txtviewExample.setLayoutParams(paramsExample);
  }
  </code></pre>
  
  <p>I realize there's all sorts of available classes for LayoutParams, and I've been playing with them all
  LinearLayout.LayoutParams, TableView.LayoutParams, RelativeLayout.LayoutParams, LayoutParams just by itself... 
  No matter which one I try, any attempt at calling "setLayoutParams" renders the entire TextView gone.
  I've scoured the forums here, and haven't quite found the answer.  This can't be THAT uncommon.  </p>