Set Background image, if the Custom Listview item is pressed

问题

I am using custom list view using base adapter

<ListView
        android:id="@+id/lstHome"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:drawSelectorOnTop="false"
        android:cacheColorHint="#3d4241"
        android:clickable="true"
        android:listSelector="@drawable/listbackground">
    </ListView>

and listbackground.xml

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

<item android:drawable="@android:color/transparent" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/list_background" android:state_pressed="true"/>
<item android:drawable="@drawable/list_background" android:state_pressed="false" android:state_selected="true"/>
</selector>

when i click on item the image background is just flashing but i want it should be activated and show the background. i used android:attr/activatedBackgroundIndicator in custom listview but it does not work for api below level 11.

回答1:

You will use this custom adapter in you listview

public class CustomAdapter extends ArrayAdapter<Sample> {

public ArrayList<Sample> mlist;
public Context context;
public LayoutInflater inflater;
public int[] i ;
public int start=0;
private LinearLayout layout;
private View view;
private View mLastView;

public CustomAdapter(Context context, int resource, ArrayList<Sample> mlist) {
    super(context, resource);
    this.mlist = mlist;
    start=0;
    this.context = context;
    i = new int[this.mlist.size()];
    inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public int getPosition(Sample item) {
    return super.getPosition(item);
}

@Override
public Sample getItem(int position) {
    return mlist.get(position);
}

@Override
public int getCount() {
    return mlist.size();
}

@Override
public long getItemId(int position) {
    return super.getItemId(position);
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
     view = inflater.inflate(R.layout.listitem, null);
    layout = (LinearLayout)view.findViewById(R.id.linearlayoutSample);;
    TextView text1 = (TextView) view.findViewById(R.id.item1);
    TextView text2 = (TextView) view.findViewById(R.id.item2);
    layout.setBackgroundColor(Color.BLACK);
    text1.setText(mlist.get(position).getListitem1());
    text2.setText(mlist.get(position).getListitem2());      
    layout.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {   
            if(start==0)
            {
                mLastView = v;
                start++;
            }

            if(start>0)
            {
                mLastView.setBackgroundColor(Color.BLACK);
                mLastView = v;
            }

            v.setBackgroundColor(Color.GRAY);               
        }
    });
    return view;
}

}

回答2:

Instead of listselector, you can try this:

Create bg_key.xml:

<?xml version="1.0" encoding="utf-8" ?>
  <selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_selected="true"
        android:drawable="@color/pressed_color"/>
    <item
       android:drawable="@color/default_color" />
  </selector>

Then include this background to your listview:

android:background="@drawable/bg_key"

And then, in your activity, create an onclick listner for your listview:

  listView.setOnItemClickListener(new OnItemClickListener() {

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position,long arg3) {
      view.setSelected(true);

  }
}

The color code in bg_key, is up to you..

回答3:

you could try this with the previous version of your code:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:color/transparent" android:state_pressed="false" 
          android:state_selected="false"/>
     <item android:drawable="@drawable/list_background" android:state_pressed="true"/>
     <item android:drawable="@drawable/list_background" android:state_selected="true"/>
     <item android:drawable="@drawable/list_background" android:state_active="true"/>
</selector>

Then in the onClick of the view, get the relativeLayout or the LinearLayout inflating the row, and set its activated and also selected property to true, and that way i think you will get a background that remains.

Hope that helps.

来源：https://stackoverflow.com/questions/22728444/set-background-image-if-the-custom-listview-item-is-pressed

标签

android

android-listview