Question

我有一个名为ArrayAdapter的{{1}}，其SpinnerAdapter作为其布局。此外，它还需要android.R.layout.simple_spinner_item ArrayList个ContactInfo个对象才能显示。

然后我有一个名为Spinner的{{1}}，当选择＆＃34;＆＃34;是;它从前面提到的selectionWheel中提取ContactInfo个对象，并将其添加到新的ArrayList。

现在我第二次提起ArrayList;我想检查两个Spinner之间的匹配项，如果匹配则通过更改其背景颜色突出显示ArrayLists中的相应项目。

以下是我的尝试：

Spinner

然而，这并没有达到我所描述的预期结果，而且我不确定从这里去哪里......

Answer 1

这就是我所做的

package com.example.click;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends Activity{
    Spinner mySpinner;
    ArrayList<String> check = new ArrayList<String>();
    String[] myArray={"1","2","3","4","5"};
    String[] newArray={};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mySpinner = (Spinner)findViewById(R.id.spinner1);

        mySpinner.setAdapter(new MyAdapter(this,android.R.layout.simple_spinner_item, myArray));

        mySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                // TODO Auto-generated method stub
                if(check.contains(myArray[arg2])){
                    check.remove(myArray[arg2]);
                }
                else{
                    check.add(myArray[arg2]);
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub

            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


    public class MyAdapter extends ArrayAdapter<String>{

        public MyAdapter(Context context, int textViewResourceId,
                String[] objects) {
            super(context, textViewResourceId, objects);
            // TODO Auto-generated constructor stub
        }

        @Override
        public View getDropDownView(int position, View cnvtView, ViewGroup prnt){
            LayoutInflater inflater = getLayoutInflater();
            View spinnerItem = inflater.inflate(android.R.layout.simple_spinner_item, null);

            TextView mytext= (TextView)spinnerItem.findViewById(android.R.id.text1);
            mytext.setText(myArray[position]);

            if(check.contains(myArray[position])){
                spinnerItem.setBackgroundColor(Color.GREEN);
            }

            return spinnerItem;
        }

    }


}

在项目选择中更改Android中单个微调器项的背景颜色

1 个答案: