Bar Alphabet étendu LinearLayout problème

Question

J'essaie d'obtenir une barre de positionnement Alphabet Android pour travailler suivant un vieil exemple fourni par Josh Guilfoyle:

AlphabetBarListView< - projet original et la capture d'écran peuvent être trouvés ici

j'ai pu déboguer le code pour obtenir la barre de l'alphabet lui-même pour afficher en utilisant

setContentView(new AlphabetBar(this)); 

, mais je ne peux pas comprendre comment afficher le alphabe t barre sur une liste sous Android 2.1 comme indiqué sur la photo. J'ai créé un très petit projet pour essayer de le faire fonctionner, mais je fais évidemment quelque chose de mal. Merci les gars! J'apprécie vraiment l'aide.

HelloWorld.java

package com.demo.helloworld; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.ListView; 

public class HelloWorld extends Activity { 
    /** Called when the activity is first created. */ 

    public AlphabetBar mAlphabetBar; 
    public ListView listView; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     setContentView(new AlphabetBar(this)); 

     listView = (ListView)findViewById(R.id.mylist); 

     mAlphabetBar = (AlphabetBar)findViewById(R.id.alphabet_bar); 
    } 
} 

AlphabetBar.java

package com.demo.helloworld; 

import java.util.Map; 

import android.content.Context; 
import android.text.Layout.Alignment; 
import android.util.AttributeSet; 
import android.util.Log; 
import android.view.Gravity; 
import android.view.View; 
import android.widget.LinearLayout; 
import android.widget.TextView; 


public class AlphabetBar extends LinearLayout 
{ 
    private static final String TAG = "AlphabetBar"; 

    public AlphabetBar(Context context) 
    { 
     super(context); 
     init(); 
    } 

    public AlphabetBar(Context context, AttributeSet attrs, Map inflateParams) 
    { 
     super(context, attrs); 
     init(); 
    } 

    public void init() 
    { 
     setLayoutParams(new LinearLayout.LayoutParams(
      LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT)); 

     /* Not strictly necessary since we override onLayout and onMeasure with 
     * our custom logic, but it seems like good form to do this just to 
     * show how we're arranging the children. */ 
     setOrientation(VERTICAL); 

     char[] labels = 
     { 
      '#', 
      'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 
      'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 
     }; 

     for (int i = 0; i < labels.length; i++) 
     { 
      TextView label = new TextView(getContext()); 
      label.setText(String.valueOf(labels[i])); 
//   label.setAlignment(Alignment.ALIGN_CENTER); 
      label.setGravity(Gravity.CENTER_VERTICAL); 

      label.setClickable(true); 
      label.setFocusable(true); 
      label.setOnClickListener(mLabelClicked); 

      addView(label, new LinearLayout.LayoutParams(
       LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); 
     } 
    } 

    private OnClickListener mLabelClicked = new OnClickListener() 
    { 
     public void onClick(View v) 
     { 
      if (mClickCallback != null) 
       mClickCallback.onClick(v); 
     } 
    }; 

    private OnClickListener mClickCallback = null; 

    /** 
    * Set the click listener for alphabet labels. 
    * 
    * @param listener 
    * Click listener, or null to unset. 
    */ 
    public void setLabelClickListener(OnClickListener listener) 
    { 
     mClickCallback = listener; 
    } 

    @Override 
    protected void onLayout(boolean changed, int l, int t, int r, int b) 
    { 
     super.onLayout(changed, l, t, r, b); 
    } 

    private void useDefaultBackground() 
    { 
     setBackgroundResource(R.drawable.alphabet_bar_bg); 
    } 

    @Override 
    protected void onMeasure(int wSpec, int hSpec) 
    { 
     Log.d(TAG, "onMeasure(" + wSpec + ", " + hSpec + ")"); 

     if (getBackground() == null) 
      useDefaultBackground(); 

     int count = getChildCount(); 

     int hMode = MeasureSpec.getMode(hSpec); 
     int hSize = MeasureSpec.getSize(hSpec); 

     assert hMode == MeasureSpec.EXACTLY; 

     int maxWidth = 0; 

     int hSizeAdj = hSize - getPaddingTop() - getPaddingBottom(); 
     float childHeight = hSizeAdj/count; 

     /* Calculate how many extra 1-pixel spaces we'll need in order to make 
     * childHeight align to integer heights. */ 
     int variance = hSizeAdj - ((int)childHeight * count); 

     int paddingWidth = getPaddingLeft() + getPaddingRight(); 

     for (int i = 0; i < count; i++) 
     { 
      TextView label = (TextView)getChildAt(i); 

      label.setTextSize(childHeight * 0.9F); 

      int thisHeight = (int)childHeight; 

      if (variance > 0) 
      { 
       thisHeight++; 
       variance--; 
      } 

      label.measure 
       (MeasureSpec.makeMeasureSpec(13, MeasureSpec.EXACTLY), 
       MeasureSpec.makeMeasureSpec(thisHeight, MeasureSpec.EXACTLY)); 

      maxWidth = Math.max(maxWidth, label.getMeasuredWidth()); 
     } 

     maxWidth += paddingWidth; 

     setMeasuredDimension(resolveSize(maxWidth, wSpec), hSize); 
    } 
} 

alphabet_bar_bg.xml (sous dossier étirable)

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
    type="rectangle"> 
    <solid android:color="#20777777" /> 
    <corners android:radius="8dip" /> 
</shape> 

mail.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    > 
    <ListView 
     android:id="@+id/mylist" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     /> 

    <com.demo.helloworld.AlphabetBar 
     android:id="@+id/alphabet_bar" 
     android:layout_width="wrap_content" 
     android:layout_height="fill_parent" 
     android:layout_alignParentRight="true" 
     android:layout_marginRight="6dip" 
     android:layout_marginTop="14dip" 
     android:layout_marginBottom="14dip" 
     android:paddingTop="2dip" 
     android:paddingBottom="2dip" 
     android:paddingLeft="4dip" 
     android:paddingRight="4dip" 
     /> 
</LinearLayout> 

Answer 1

D'accord, je compris cela.

(1) Changer la mise en page de LinearLayout à RelativeLayout.

(2) Supprimer Carte inflateParams du constructeur AlphabetBar.

Et Viola !! Ça marche! LOL