Question

我想创建一个包含图标和字符串的自定义微调器，但是从资源数组中获取值问题是当我运行应用程序时它不会启动。但是当我在活动中声明数组时，这并没有发生通过声明我的意思是：String[] vcode = {"d1","d2","d3","d4","d5"};
我已将这些变量移至oncreate，但该图标未显示在我的应用程序中。为什么呢？

以下是我迄今为止所做的并且失败了。请告诉我哪里出错了

RES /值/ array.xml：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <integer-array name="d_icon">
        <item>@drawable/d1</item>
        <item>@drawable/d2</item>
        <item>@drawable/d3</item>
        <item>@drawable/d4</item>
        <item>@drawable/d5</item>
    </integer-array>
    <string-array name="d_code">
        <item>d1</item>
        <item>d2</item>
        <item>d3</item>
        <item>d4</item>
        <item>d5</item>
    </string-array>
    <string-array name="d_condition">
        <item>1</item>
        <item>1</item>
        <item>1</item>
        <item>0</item>
        <item>1</item>
    </string-array>
</resources>

activity_main.xml中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/Hello"
        />
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

custom_spinner_items.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:padding="5dp"
        android:src="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:padding="@dimen/activity_horizontal_margin"
        android:text="Demo"
        android:textColor="#000" />
</LinearLayout>

MainActivity.java：

package com.training.androidcustomspinner;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Spinner;

public class MainActivity extends Activity {

    //String[] vcode = {"d1","d2","d3","d4","d5"};
    //int vicon[] = {R.drawable.d1, R.drawable.d2, R.drawable.d3, R.drawable.d4, R.drawable.d5};
    String[] vcode = getResources().getStringArray(R.array.d_code);
    int vicon[] = getResources().getIntArray(R.array.d_icon);

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Spinner mySpinner = (Spinner)findViewById(R.id.spinner);

        CustomAdapter customAdapter=new CustomAdapter(getApplicationContext(),vicon,vcode);
        mySpinner.setAdapter(customAdapter);
    }
}

CustomAdapter.java

package com.training.androidcustomspinner;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomAdapter extends BaseAdapter {
    Context context;
    int vicon[];
    String[] vcode;
    LayoutInflater inflter;

    public CustomAdapter(Context applicationContext, int[] vicon, String[] vcode) {
        this.context = applicationContext;
        this.vicon = vicon;
        this.vcode = vcode;
        inflter = (LayoutInflater.from(applicationContext));
    }

    @Override
    public int getCount() {
        return vicon.length;
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        view = inflter.inflate(R.layout.custom_spinner_items, null);
        ImageView icon = (ImageView) view.findViewById(R.id.imageView);
        TextView names = (TextView) view.findViewById(R.id.textView);
        icon.setImageResource(vicon[i]);
        names.setText(vcode[i]);
        return view;
    }
}

Answer 1

我的适配器扩展了ArrayAdapter并实现了getDropDownView，它适用于我。喜欢关注

cumsum

自定义微调器包含drawable和string

1 个答案: