java - 更改 ListView 项的颜色

Question

我有一个 ListView ，其中包含有关我的客户的信息。它基本上是已预订工作的用户列表。 ListView 使用 firebase 数据库作为其来源。它连接到一个名为 Bookings 的节点。然后它将用户 ID 作为其 key 。

{
  "Bookings": {
    "User-Id appears here": {
      "Fullname": "Name Appears here",
      "Date": "",
      "Valet Type": "",
      "Car Model": "",
      "CustomerID": "",
      "Approved": ""
    }
  }
}

Approved 节点可以是“Not Approved”、“Approved”、“Canceled”这三个值之一 根据批准的值，我想更改包含数据的 ListView 项的颜色。我已经设法让 ListView 在单击该项目时更改颜色，但我希望它保持该颜色，除非“已批准”节点另有说明。

这是我目前拥有的代码，当点击该项目时它会发生变化。

bookingsref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull final DataSnapshot dataSnapshot) {
            for (final DataSnapshot snapshot : dataSnapshot.getChildren()) {

                date = snapshot.child("Date").getValue().toString();
                name = snapshot.child("Fullname").getValue().toString();
                valet = snapshot.child("ValetType").getValue().toString();
                model = snapshot.child("VehicleModel").getValue().toString();
                customerid = snapshot.child("UserId").getValue().toString();

                confirm = snapshot.child("Approved").getValue().toString();
                ApproveArray.add(confirm);
                bookingID.add(customerid);

booking_info_minor.add(date + "\n" + "Name: "+ name + "\n"+"Valet Type: "+valet + "\n" +"Model: " + model + "\n"+"Customer ID: "+ customerid );

                adapter =new ArrayAdapter<String>(Bookings .this,android.R.layout.simple_list_item_1,booking_info_minor);
                lv.setAdapter(adapter);

                lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                        String c = bookingID.get(position).toString();
                        confirm = ApproveArray.get(position);


                        Intent intent=new Intent(getBaseContext(),Booking_details.class);
                        Bundle bundle = new Bundle();
                        bundle.putString( "UserId",c);
                        intent.putExtras(bundle);
                        startActivity(intent);
                        listColour(position,confirm);


                    }
                });

            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });
}

private void listColour(int pos,String confirm){
    Log.i("Conf",confirm);
    if (confirm.equals("Approved")){
        lv = findViewById(R.id.templist);
        lv.getChildAt(pos).setBackgroundResource(R.color.approved);
    }
    if (confirm.equals("Not Approved")) {
        lv = findViewById(R.id.templist);
        lv.getChildAt(pos).setBackgroundResource(R.color.not_approved);
    }

    if (confirm.equals("Canceled")) {
        lv = findViewById(R.id.templist);
        lv.getChildAt(pos).setBackgroundResource(R.color.canceled);
    }

Answer 1

只需覆盖 ArrayAdapter 的getView 并进行如下适当的更改:

adapter = new ArrayAdapter<String>(Bookings.this, android.R.layout.simple_list_item_1, booking_info_minor) {
    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        View view = super.getView(position, convertView, parent);

        String confirm = ApproveArray.get(position);

        switch (confirm) {
            case "Approved":
                view.setBackgroundResource(R.color.approved);
                break;
            case "Not Approved":
                view.setBackgroundResource(R.color.not_approved);
                break;
            case "Canceled":
                view.setBackgroundResource(R.color.canceled);
                break;
        }

        return view;
    }
};