Using LayoutInflater : Layout « UI « Android

1. Android
2. UI
3. Layout

Using LayoutInflater

    
/***
  Copyright (c) 2008-2009 CommonsWare, LLC
  
  Licensed under the Apache License, Version 2.0 (the "License"); you may
  not use this file except in compliance with the License. You may obtain
  a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

package com.commonsware.android.fancylists.six;

import android.app.Activity;
import android.os.Bundle;
import android.app.ListActivity;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.RatingBar;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;

public class RateListDemo extends ListActivity {
  String[] items={"lorem", "ipsum", "dolor", "sit", "amet",
          "consectetuer", "adipiscing", "elit", "morbi", "vel",
          "ligula", "vitae", "arcu", "aliquet", "mollis",
          "etiam", "vel", "erat", "placerat", "ante",
          "porttitor", "sodales", "pellentesque", "augue",
          "purus"};
  
  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    
    ArrayList<RowModel> list=new ArrayList<RowModel>();
    
    for (String s : items) {
      list.add(new RowModel(s));
    }
    
    setListAdapter(new RatingAdapter(list));
  }
  
  private RowModel getModel(int position) {
    return(((RatingAdapter)getListAdapter()).getItem(position));
  }
  
  class RatingAdapter extends ArrayAdapter<RowModel> {
    RatingAdapter(ArrayList<RowModel> list) {
      super(RateListDemo.this, R.layout.row, list);
    }
    
    public View getView(int position, View convertView,
                        ViewGroup parent) {
      View row=convertView;
      ViewWrapper wrapper;
      RatingBar rate;                  
                          
      if (row==null) {    
        LayoutInflater inflater=getLayoutInflater();
        
        row=inflater.inflate(R.layout.row, parent, false);
        wrapper=new ViewWrapper(row);
        row.setTag(wrapper);
        rate=wrapper.getRatingBar();
        
        RatingBar.OnRatingBarChangeListener l=
                    new RatingBar.OnRatingBarChangeListener() {
          public void onRatingChanged(RatingBar ratingBar,
                                        float rating,
                                        boolean fromTouch)  {
            Integer myPosition=(Integer)ratingBar.getTag();
            RowModel model=getModel(myPosition);
            
            model.rating=rating;
          
            LinearLayout parent=(LinearLayout)ratingBar.getParent();
            TextView label=(TextView)parent.findViewById(R.id.label);
        
            label.setText(model.toString());
          }
        };
        
        rate.setOnRatingBarChangeListener(l);
      }
      else {
        wrapper=(ViewWrapper)row.getTag();
        rate=wrapper.getRatingBar();
      }

      RowModel model=getModel(position);
      
      wrapper.getLabel().setText(model.toString());
      rate.setTag(new Integer(position));
      rate.setRating(model.rating);
      
      return(row);
    }
  }
  
  class RowModel {
    String label;
    float rating=2.0f;
    
    RowModel(String label) {
      this.label=label;
    }
    
    public String toString() {
      if (rating>=3.0) {
        return(label.toUpperCase());
      }
      
      return(label);
    }
  }
}

/***
  Copyright (c) 2008-2009 CommonsWare, LLC
  
  Licensed under the Apache License, Version 2.0 (the "License"); you may
  not use this file except in compliance with the License. You may obtain
  a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

package com.commonsware.android.fancylists.six;

import android.view.View;
import android.widget.RatingBar;
import android.widget.TextView;

class ViewWrapper {
  View base;
  RatingBar rate=null;
  TextView label=null;
  
  ViewWrapper(View base) {
    this.base=base;
  }
  
  RatingBar getRatingBar() {
    if (rate==null) {
      rate=(RatingBar)base.findViewById(R.id.rate);
    }
    
    return(rate);
  }
  
  TextView getLabel() {
    if (label==null) {
      label=(TextView)base.findViewById(R.id.label);
    }
    
    return(label);
  }
}


//res\layout\row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:orientation="horizontal"
>
  <RatingBar
    android:id="@+id/rate"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:numStars="3"
    android:stepSize="1"
    android:rating="2" />
  <TextView
    android:id="@+id/label"
    android:paddingLeft="2px"
    android:paddingRight="2px"
    android:paddingTop="2px"
    android:textSize="40sp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
</LinearLayout>

   
    
    
    
  

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