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我正在开发一个应用程序，我必须通过单击第一个 ListView 从一个 ListView 移动到另一个 ListView。第二个活动 ListView 是一个自定义 ListView，带有一个是图标图像和一个 TextView。图像图标在启动时不可见，单击列表项后相应的图像将变为可见。第二个 ListView 是单击列表视图。！[在此处输入图像描述][1] 当我单击后退按钮并再次单击第一个ListView，第二个ListView的Clicked item变得不可见..

我是 android 新手，不知道如何管理列表项单击的状态。请帮助...我必须从第一个屏幕移动到第二个屏幕并在重新单击第一个列表视图项时保持列表视图项的状态。

第二个列表视图活动

SharedPreferences pref;
 private static String names[] = {"SV3","SV4","SV6","LV1"};  
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.selectibx);
    lv=(ListView)findViewById(R.id.listView1);
    adapter = new LvCustomAdapter(this, names); 
    lv.setAdapter(adapter);
   LoadSelections();
    ImageView img=(ImageView) lv.findViewById(R.id.image);
  if(img!=null)
    {
        img.setImageResource(R.drawable.black_arrow);
        img.setVisibility(View.VISIBLE);
        }
 lv.setOnItemClickListener(this); 
    back=(ImageView)findViewById(R.id.imageback);
    back.setOnClickListener(new View.OnClickListener() {
    public void onClick(View arg0) {
Intent = new Intent(getApplicationContext(),MainActivity.class);
Bundle b=new Bundle();
b.putString("state", "clicked");
   intent.putExtras(b);
setResult(RESULT_OK, intent);
startActivity(intent);  
finish();
}

    });
}

public void onItemClick(AdapterView<?> lvv, View view, int position, long id) {



    if (current != -1) {
        View last = lvv.getChildAt(current); // the last one clicked
        last.findViewById(R.id.image).setVisibility(View.GONE);
     }
    view.findViewById(R.id.image).setVisibility(View.VISIBLE);
    current = position; // remember the new clicked position

    System.out.println("Selected State is: "+current);

    SaveSelections(view);

}

private void SaveSelections(View v) {
    // TODO Auto-generated method stub
     SharedPreferences settings = getSharedPreferences( PREFS_NAME,0 );
        SharedPreferences.Editor editor = settings.edit();

        editor.putInt("Raman", current);
        editor.commit();
}

private void LoadSelections() {


        pref = this.getApplicationContext().getSharedPreferences(PREFS_NAME, MODE_WORLD_READABLE);
        int xy=pref.getInt("Raman",1);
        adapter = new LvCustomAdapter(this, names);   
        lv.setAdapter(adapter);
          lv.setSelection(xy);

          System.out.println(lv.getSelectedItemPosition()+"****"+xy);

         View v=lv.getChildAt(xy);

    }

}

自定义适配器类：

public class LvCustomAdapter extends BaseAdapter  {
 protected ListView mListView;
   public String title[];  
   //public String designations[];
   public Activity context;  
    public LayoutInflater inflater; 
    int current=-1;
    public LvCustomAdapter(Activity context,String[] title) {  
        super();  

        this.context = context;  
        this.title = title;  
        this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
    }  

    public int getCount() {  
        // TODO Auto-generated method stub  
        return title.length;  
    }  

    public Object getItem(int position) {  
        // TODO Auto-generated method stub  
        return null;  
    }  

    public long getItemId(int position) {  
        // TODO Auto-generated method stub  
        return 0;  
    }  

    public static class ViewHolder  
    {  
        ImageView imgarrow;  
        TextView txtViewName;  


    }  

    public View getView(int position, View convertView, ViewGroup parent) {  
        // TODO Auto-generated method stub  

        ViewHolder holder;  
        if(convertView==null)  
        {  
            holder = new ViewHolder();  
            convertView = inflater.inflate(R.layout.commonlist, null);  

            holder.txtViewName = (TextView) convertView.findViewById(R.id.tvItem);  


            holder.imgarrow = (ImageView) convertView.findViewById(R.id.image);  


           /* holder.email.setOnClickListener(emailClickListener);
            holder.mobile.setOnClickListener(mobileClickListener);
            holder.phone.setOnClickListener(phoneClickListener);
            convertView.setTag(holder);  */
            //int a=convertView.getSelectedItemPosition();
            int a=position;



            convertView.setTag(holder); 
        }  
        else  
            holder=(ViewHolder)convertView.getTag();  
   holder.txtViewName.setText(title[position]); 
    holder.imgarrow.setImageResource(R.drawable.black_arrow);
holder.imgarrow.setVisibility(View.INVISIBLE);

        return convertView;  
    }   
}

谢谢....

4

1 回答 1

1

为了保持您可以使用的状态..

Shared Preferences
Save your desired values in onPause() and get them again in onResume()

希望它对你有用。

于 2012-09-21T11:23:07.507 回答