android – 使用SimpleAdapter更改ListView中项目的颜色

我正在使用SimpleAdapter填充ListView

ArrayList<Recipe> ciboList = null;

    ArrayList<HashMap<String,Object>> data = new ArrayList<HashMap<String,Object>>();

    for(int i=0;i<ciboList.size();i++){
        // Recipe is my own class defined in another java
        Recipe r = (Recipe) ciboList.get(i);

        HashMap<String,Object> ricettaMap = new HashMap<String, Object>();

        // Informations loaded from Recipe.java
        ricettaMap.put("tipo", r.getTipo());
        ricettaMap.put("titolo", r.getTitolo());
        ricettaMap.put("difficolta", r.getDifficolta());
        ricettaMap.put("tempo", r.getTempo());
        ricettaMap.put("persone", r.getPersone());
        ricettaMap.put("ingredienti", r.getIngredienti());
        ricettaMap.put("vino", r.getVino());
        ricettaMap.put("consigli", r.getConsigli());
        ricettaMap.put("preparazione", r.getPreparazione());            

        }        
    }

    String[] from = {"tipo", "titolo", "difficolta", "tempo", "ingredienti", "vino", "consigli", "preparazione", "persone"};
    int[] to = {R.id.ricettaTipo, R.id.ricettaTitolo, R.id.ricettaDifficolta, R.id.ricettaTempo, R.id.ricettaIngredienti, R.id.ricettaVino, R.id.ricettaConsigli, R.id.ricettaPrep, R.id.ricettaPersone};

    SimpleAdapter adapter = new SimpleAdapter(
            this,
            data,
            R.layout.list_cibo,
            from,
            to);

R.layout.list_cibo的XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:padding="5dip"
android:gravity="right">
<TextView
    android:text="Titolo Ricetta"
    android:singleLine="true"       
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_marginLeft="5dip"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:scrollHorizontally="false"
    android:id="@+id/ricettaTitolo">
</TextView>
<TextView
    android:text="Difficoltà"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:textColor="#FF0000"
    android:layout_marginLeft="5dip"
    android:layout_alignParentBottom="true"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/ricettaDifficolta"
    android:singleLine="true"
    android:scrollHorizontally="false">
</TextView>
<TextView
    android:text="Tempo"
    android:layout_toRightOf="@+id/ricettaDifficolta"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:textColor="#FF3300" 
    android:layout_marginLeft="20dip"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/ricettaDifficolta"
    android:gravity="right"
    android:id="@+id/ricettaTempo"
    android:layout_width="fill_parent">
</TextView>
<TextView
    android:id="@+id/ricettaTipo"
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
</TextView>
<TextView
    android:id="@+id/ricettaPersone"
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
</TextView>
<TextView
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" android:id="@+id/ricettaIngredienti">
</TextView>
<TextView
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" android:id="@+id/ricettaVino">
</TextView>
<TextView
    android:id="@+id/ricettaConsigli"
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
</TextView>
<TextView
    android:id="@+id/ricettaPrep"
    android:visibility="gone"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
</TextView>
  </RelativeLayout>

我使用三个不同的SimpleAdapter创建三个不同的列表,基于三种不同的颜色;我想做的是根据参数创建一个列表,用三种颜色中的一种颜色中的每个项目着色.

我尝试使用.setColor修改TextViews,但它不起作用.

解决方法:

SimpleAdapter中有一个方法.它叫做ViewBinder.尝试在以下情况后立即包含以下代码：
 SimpleAdapter adapter = new SimpleAdapter(this,data,R.layout.list_cibo,from,to);“and”setListAdapter(adapter);.

SimpleAdapter.ViewBinder binder = new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object object, String value) {
System.out.println("view= "+view);
    System.out.println("view.toString()= "+ view.toString());
    System.out.println("view.getId()= "+ view.getId());
    System.out.println("view.getVisibility()= "+ view.getVisibility());
    System.out.println("view.equals((TextView) view.findViewById(R.id. ricettaTipo))= "+ view.equals((TextView) view.findViewById(R.id. ricettaTipo)));
    if (view.equals((TextView) view.findViewById(R.id.ricettaTipo)))
            {
                TextView ricetta = (TextView) view.findViewById(R.id.ricettaTipo);
                    //Change color/answer/etc for ricettaTipo
            }

//OR
          if (view instanceof TextView) {
                    //Do stuff
                    return true;
                }

                return false;
            }
            };
adapter.setViewBinder(binder);

setListAdapter(adapter);    

将为每个R.id.ricettaTipo,R.id.ricettaTitolo,R.id.ricettaDifficolta,R.id.ricettaTempo,R.id.ricettaIngredienti,R.id.ricettaVino,R.id.ricettaConsigli,R调用setViewValue方法.id.ricettaPrep,R.id.ricettaPersone.每次View /每次正在绘制上述R.id之一时,都会调用setViewValue方法.

标签：simpleadapter,android,listview
来源： https://codeday.me/bug/20190929/1832708.html