单击ListView项目不起作用，我每个ListView项目中都有三个textview和一个按钮

Question

I am writing an app in which i am trying to open an activity and update item detail using Tap on Item in a ListView

Problem:

whenever i do click on item in a ListView, not able to start that activity and i also want to know how to update item detail...

I have three textviews and a button in my each ListView Item

By using below code in CartActivity, i am not able to open ProductInformationActivity

    ListView mLstView1 = (ListView) findViewById(R.id.listView1);
    CartAdapter mViewCartAdpt = new CartAdapter(CartActivity.this);
mLstView1.setAdapter(mViewCartAdpt);
    mLstView1.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {

            Intent intent = new Intent(CartActivity.this, com.ProductInformationActivity.class);
            startActivity(intent);
        }
    });

CartAdapter.java:

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

    HashMap<String, String> item = new HashMap<String, String>();
    item = Constants.mItem_Detail.get(position);

    // Setting all values in listview

    title.setText(item.get(com.ProductInformationActivity.KEY_TITLE));
    qty.setText(item.get(com.ProductInformationActivity.KEY_QTY));
    cost.setText(item.get(com.ProductInformationActivity.KEY_COST));
    total.setText(item.get(com.ProductInformationActivity.KEY_TOTAL));

    return vi;

}   

Answer 1

Have you added your Ativity to your manifest File? You need to add your activity in the application tag:

<activity android:name="com.erachnida.restaurant.versionoct.menu.ProductInformationActivity" />

Answer 2

I think that your problem is that you are assigned OnItemClickListener for whole ListView and then for ImageView. Also about ImageView, look:

Intent mInViewCartRefresh = new Intent(activity, CartActivity.class);
activity.startActivity(mInViewCartRefresh);
activity.finish();

Here you are probably trying to "refresh" ListView but this is wrong. If you want to update your ListView all what you need is to use

adapter.notifyDataSetChanged();

that indicates that: "I changed datasource, i want from your refresh yourself."

So my suggestion is to remove your "inner" listener, remove your snippet of code mentioned above and leave only your listener for ListView.

Intent intent = new Intent(CartActivity.this, ProductInformationActivity.class);
startActivity(intent);

Then if you click on ListView, from int position parameter you can get particular item for collection and you can do whatever you want with it. After "action" you need to call notifyDataSetChanged() that refresh your ListView.

Answer 3

Asper our conversation you have check this link . so, in itemClickListener put this lines:

Intent intent = new Intent(CartActivity.this, ProductInformationActivity.class);
                startActivity(intent);

just like below:

public OnClickListener mOnTitleClickListener3 = new OnClickListener() {
            public void onClick(View v) {
                final int position = list_v
                        .getPositionForView((View) v.getParent());

                Log.d("you are click on Ratings","you are click on Ratings");
                Intent intent = new Intent(CartActivity.this, ProductInformationActivity.class);
                startActivity(intent);

            }
        };