Question

我搜索了stackoverflow但无法找到答案（确定有一个地方）但我正在尝试为每个listview输入添加一个活动。我可以用一个意图来管理它，但是我如何为每个listview输入分配一个单独的活动。所以要清楚，我想让每个项目都有一个血清活动。

目前使用此代码发起活动，但希望每个项目都有单独的活动。

public class ListviewActivityActivity extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // storing string resources into Array
    String[] adobe_products = getResources().getStringArray(R.array.list_products);

    // Binding resources Array to ListAdapter
    this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, adobe_products));

    ListView lv = getListView();

    // listening to single list item on click
    lv.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {

          // selected item
          String product = ((TextView) view).getText().toString();

          // Launching new Activity on selecting single List Item
          Intent i = new Intent(getApplicationContext(), BMICalculatorActivity.class);
          startActivity(i);


      }
    });
}

尝试添加此功能但无法正常工作

private static final int ACTIVITY_0 = 0;
          private static final int ACTIVITY_1 = 1;
          private static final int ACTIVITY_2 = 2;


          protected void onListItemClick(ListView l, View v, int position, long id)
          {
              super.onListItemClick(l, v, position, id);
              final Intent intent = new Intent();
              // Set up different intents based on the item clicked: 
              switch (position)
              {
                  case ACTIVITY_0:
                      intent.setClass(this, listview.activty.BMICalculatorActivity.class);
                      break;
                  case ACTIVITY_1:
                      intent.setClass(this, listview.activty.BodyLog.class);
                      break;

我知道它的排序很简单，所以任何帮助都会很棒。感谢

Answer 1

尝试这样的事情：

// listening to single list item on click
    lv.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {

          Intent i;

          // selected item
          String product = (String) lv.getItem(position);
          if(product.equals("photoshop"))
                        i = new Intent(ListviewActivity.this, Photoshop.class);
          else if (product.equals("final cut pro"))
                        i = new Intent(ListviewActivity.this, FinalCutPro.class);
          else
                        i = new Intent(ListviewActivity.this, Generic.class);

          startActivity(i);


      }
    });

另一种选择是创建一个POJO，其中包含listview条目的名称和要调用的类。并添加一个数组而不是一个字符串数组。这将需要使用某种ArrayAdapter。然后，当你得到项目时，你只需致电startActivity(new Intent(listviewActivity.this, myPojo.classToCall);你应该能够在某个地方找到一个很好的例子......

Answer 2

我想你想要这样的东西：

     Intent i = null;
     switch (position)
          {
              case ACTIVITY_0:
                  i = new Intent(getApplicationContext(), BMICalculatorActivity.class);
                  break;
              case ACTIVITY_1:
                  i = new Intent(getApplicationContext(), BodyLog.class);
                  break;
          }

      if(i != null)
      {
         startActivity(i);
      }

将多个事件添加到listview

2 个答案: