Android的ListView和背景顏色

Question

喜我使用下面的XML作爲我customlistview背景

是單擊某個項目時，它會突出，但它不會持續下去，它只能創建一個可點擊的效果，我想突出顯示特定項目在列表視圖中點擊時

<?xml version="1.0" encoding="utf-8"?> 

<selector 
xmlns:android="http://schemas.android.com/apk/res/android"> 

<!--ON FOCUS --> 

<item 
android:state_focused="true" 
android:state_pressed="false" 
android:drawable="@@drawable/appcategoryselectedimg" /> 

<!--ON CLICK--> 

<item 
android:state_focused="true" 
android:state_pressed="true" 
android:drawable="@@drawable/appcategoryselectedimg" /> 

<!--long touch and simple touch and release--> 
<item 
android:state_focused="false" 
android:state_pressed="true" 
android:drawable="@@drawable/appcategoryselectedimg" /> 

<!--Default --> 
<item 
android:drawable="@color/transperent" /> 
</selector> 

Answer 1

因爲你做了一個簡單的點擊。你需要的是當用戶點擊一個物品時爲state_selected和setSelected(true)定義drawable。

Answer 2

請參閱下面的代碼用於樣品活性ListViewGeneralSampleProjectActivity.java

public class ListViewGeneralSampleProjectActivity extends Activity { 
    private ListView sampleListView; 
    private static int save = -1; 
    int pos = 0; 
    MySimpleArrayAdapter adapter; 
    /** Called when the activity is first created. */ 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     String[] values = new String[] { "Android", "iPhone", "WindowsMobile", 
       "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X", 
       "Linux", "OS/2","hai","Android", "iPhone", "WindowsMobile", 
       "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X", 
       "Linux", "OS/2","hai","OS/2","hai", "Ubuntu", "Windows7", "Max OS X", 
       "Linux", "OS/2","hai","OS/2","hai" }; 
     sampleListView=(ListView) findViewById(R.id.listView1); 
     adapter = new MySimpleArrayAdapter(this, values); 

     sampleListView.setAdapter(adapter); 
     sampleListView.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       // When clicked, show a toast with the TextView text 
       Toast.makeText(getApplicationContext(),position+" Pressed", Toast.LENGTH_SHORT).show(); 
       adapter.setCurrent(position); 
       adapter.notifyDataSetChanged(); 

      } 
     }); 

    } 

} 


MySimpleArrayAdapter.java 

public class MySimpleArrayAdapter extends ArrayAdapter<String> { 
    private final Context context; 
    private final String[] values; 
    private int selected=0; 

    public MySimpleArrayAdapter(Context context, String[] values) { 
     super(context, R.layout.rowlayout, values); 
     this.context = context; 
     this.values = values; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View rowView = inflater.inflate(R.layout.rowlayout, parent, false); 
     TextView textView = (TextView) rowView.findViewById(R.id.textView1); 

     textView.setText(values[position]); 
     if(position==selected) 
     { 
      rowView.setBackgroundColor(Color.RED); 
     } 

     return rowView; 
    } 

    public void setCurrent(int position) { 
     // TODO Auto-generated method stub 
     this.selected=position; 
    } 
} 

main.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="fill_parent" 
    android:orientation="vertical" > 

    <ListView 
     android:id="@+id/listView1" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" > 
    </ListView> 

</LinearLayout> 

rowlayout.xml 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <TextView 
     android:id="@+id/textView1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Large Text" 
     android:textAppearance="?android:attr/textAppearanceLarge" /> 

</LinearLayout>