Question

我是android的新手并且在具有图像和文本的自定义微调器中搜索如何添加提示（无法选择）。虽然我发现它用于简单的微调器，但我无法实现它自定义微调器。我的代码：

    package com.example.hp.login_stratup_labs;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;
import android.widget.TextView;

public class RegistrationActivity extends Activity {

    String[] codes = {"Select Country", "India  -  +91", "United States of America  -  +1"};
    // Declaring the Integer Array with resourse Id's of Images for the Spinners
    int[] flags = {0, R.drawable.f094, R.drawable.f222};
    Spinner country;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_registration);
        Spinner countrycode=(Spinner)findViewById(R.id.registerCountryCode);
        countrycode.setAdapter(new MyAdapter(RegistrationActivity.this, R.layout.custom, codes));

    }

    public class MyAdapter extends ArrayAdapter<String>{

        public MyAdapter(Context context, int textViewResourceId,   String[] objects) {
            super(context, textViewResourceId, objects);
        }

        @Override
        public View getDropDownView(int position, View convertView,ViewGroup parent) {
            return getCustomView(position, convertView, parent);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            return getCustomView(position, convertView, parent);
        }

        public View getCustomView(int position, View convertView, ViewGroup parent) {

            LayoutInflater inflater=getLayoutInflater();
            View row=inflater.inflate(R.layout.custom, parent, false);
            TextView label=(TextView)row.findViewById(R.id.txt);
            label.setText(codes[position]);

            ImageView flag_image=(ImageView)row.findViewById(R.id.img);
            flag_image.setImageResource(flags[position]);

            return row;
        }
    }
}

Answer 1

你可以这样做

主要活动中的

String[] codes = {"India  -  +91", "United States of America  -  +1","Select Country"};

MyAdapter adapter = new MyAdapter(RegistrationActivity.this, R.layout.custom, codes);
Spinner countrycode=(Spinner)findViewById(R.id.registerCountryCode);
        countrycode.setAdapter(adapter);

countrycode.setSelection(adapter.getCount());

将此方法添加到

@Override
    public int getCount() {
        return codes.length()-1;
    }

在android中为自定义微调器添加提示

1 个答案: