Question

我正在尝试更改列表视图项目的图像，如果用户选择该项目，其图像会永久更改。但是当我的代码只有单个项目在用户点击其他项目时更改以前更改的项目获取更改为默认值并且新选择的项目会更改等等。如何永久更改此项... ??

MainActivity

List<RowItem> rowItems;
    private BaseClass adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Singleton.populate = new ArrayList<Singleton.ProfileBean>();
        setContentView(R.layout.fragment_main);

        lay1 = (LinearLayout) findViewById(R.id.lay1);
        lay2 = (LinearLayout) findViewById(R.id.lay2);

        lay2.setVisibility(View.VISIBLE);
        img = R.drawable.praying_hands_normal;

        rowItems = new ArrayList<RowItem>();
        for (int i = 0; i < 50; i++) {
            RowItem item = new RowItem(Dias[i], Prayers[i], img);
            rowItems.add(item);
        }



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

        adapter = new BaseClass(this, rowItems);
        listView.setAdapter(adapter);


        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub

                pos = position;

                Intent i = new Intent(MainActivity.this, OpenActivity.class);
                startActivity(i);

            }
        });

    }

BaseClass的

public class BaseClass extends BaseAdapter {
        Context context;
        List<RowItem> rowItems;

        /* private view holder class */
        public class ViewHolder {
            public ImageView imageView;
            public TextView txtDias;
            public TextView txtPrayers;

        }

        public BaseClass( Context context,List<RowItem> rowItems) {
            // TODO Auto-generated constructor stub
            this.context = context;
            this.rowItems = rowItems;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;

            LayoutInflater mInflater = (LayoutInflater) context
                    .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.list, null);
                holder = new ViewHolder();

                holder.txtDias = (TextView) convertView.findViewById(R.id.dias);
                holder.txtPrayers = (TextView) convertView
                        .findViewById(R.id.prayers);
                holder.imageView = (ImageView) convertView
                        .findViewById(R.id.symbol);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            RowItem rowItem = (RowItem) getItem(position);

            holder.txtPrayers.setText(rowItem.getDesc());
            holder.txtDias.setText(rowItem.getTitle());
            holder.imageView.setImageResource(R.drawable.praying_hands_normal);
          if(pos == position && OpenActivity.a + OpenActivity.b +
                  OpenActivity.c == 1 || OpenActivity.a + OpenActivity.b +
                  OpenActivity.c == 2)
          {
              holder.imageView.setImageResource(R.drawable.praying_hands_bookmark);

          } 

          else if(pos == position && OpenActivity.a + OpenActivity.b +
                  OpenActivity.c == 3 )
          {
              holder.imageView.setImageResource(R.drawable.praying_hands_selected);
          }


          return convertView;

        }

OpenActivity

public class OpenActivity extends Activity implements OnClickListener {
    Button btn1, btn2, btn3;
    public static int a= 0,b=0,c=0;
OpenActivity Instance;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.openactivity);

        btn1 = (Button) findViewById(R.id.button1);
        btn2 = (Button) findViewById(R.id.button2);
        btn3 = (Button) findViewById(R.id.button3);
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);




    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        if (v == btn1) {
            Intent i = new Intent(this, DFamily.class);
            startActivity(i);
            a =1;

            Toast.makeText(getApplication(), "BTN", Toast.LENGTH_SHORT).show();

        } else if (v == btn2) {
            Intent a = new Intent(this, DIndividual.class);
            startActivity(a);
            b =1;
            Toast.makeText(getApplication(), String.valueOf(b), Toast.LENGTH_SHORT).show();
    } else if (v == btn3) {
            Intent x = new Intent(this, DGroup.class);
            startActivity(x);
            c =1;
            Toast.makeText(getApplication(), "BTN2", Toast.LENGTH_SHORT).show();
        }

    }

Answer 1

我认为你需要一个新的适配器。来自源的项目，您可以使用setimage（）方法设置项目图像。这样它不是listviewitem更新其项目本身。你明白了吗？

永久更改listivew项目的图像

1 个答案: