定义的ListView的Andr​​oid更新的TextView

定义的ListView的Andr​​oid更新的TextView

本文介绍了从项目在自定义的ListView的Andr​​oid更新的TextView的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个TextView,EDITTEXT一个自定义的ListView和上一排按钮。 ListView控件与适配器创建的。结果
我想更新与EDITTEXT输入的值TextView的时候我preSS的按钮。
我想这样做,而无需刷新整个列表。结果
任何IDEEA我怎样才能从列表中只更新一行?结果
谢谢!

要更清楚,我会提供code:

私有静态类EfficientAdapter延伸BaseAdapter {
        私人LayoutInflater mInflater;
        上下文myContext;

 公共EfficientAdapter(上下文的背景下){
        mInflater = LayoutInflater.from(上下文);
        myContext =背景;
    }    公众诠释的getCount(){
        返回nameList.length;
    }    公共对象的getItem(INT位置){
        返回的位置;
    }    众长getItemId(INT位置){
        返回的位置;
    }    公共查看getView(最终诠释的立场,观点convertView,
            父母的ViewGroup){
        最后ViewHolder持有人;
        如果(convertView == NULL){
            convertView = mInflater.inflate(R.layout.travelpassengers_item,
                    空值);
            持有人=新ViewHolder();
            holder.ratingTv =(TextView中)convertView
                    .findViewById(R.id.tvTPRating);            holder.rateBtn =(按钮)convertView
                    .findViewById(R.id.btnTPRate);
            holder.plusBtn =(按钮)convertView
                    .findViewById(R.id.btnPlus);
            holder.minusBtn =(按钮)convertView
                    .findViewById(R.id.btnMinus);
            holder.rateEt =(EditText上)convertView
                    .findViewById(R.id.etTPRating);
        }其他{
            支架=(ViewHolder)convertView.getTag();
        }        holder.ratingTv.setText(等级[位置] +/ 10);        holder.callBtn.setTag(PHONELIST [位置]);        holder.ratingBtn.setTag(IDS [位置]);
        holder.ratingDisableBtn.setTag(numberRates [位置]);
        holder.ratingTv.setTag(等级[位置]);
        holder.rateEt.setTag(位置);        holder.rateBtn.setOnClickListener(新View.OnClickListener(){            公共无效的onClick(视图v){
                // TODO自动生成方法存根
                        。字符串ID = holder.ratingBtn.getTag()的toString();
                        INT位置=的Integer.parseInt(holder.rateEt
                                。.getTag()的toString());
                        双oldRate =双
                                .parseDouble(等级[位置]);
                        INT数= numberRates [位置]
                        双newRate = Double.parseDouble(holder.rateEt
                                。.getText()的toString());                        DecimalFormat的oneDigit =新的DecimalFormat(
                                #,## 0.0);
                        数++;
                        双平均=(oldRate + newRate)/号码;
                        newRate = Double.valueOf(oneDigit.format(AVG));
                    //我想把从newRate值在合适的位置上holder.ratingTv而不更新整个ListView控件。                }
            }
        });        holder.plusBtn.setOnClickListener(新View.OnClickListener(){            公共无效的onClick(视图v){
                // TODO自动生成方法存根
                INT率=的Integer.parseInt(holder.rateEt.getText()
                        的ToString());
                如果(速度小于10){
                    率++;
            holder.rateEt.setText(Integer.toString(率));
                }
            }
        });        holder.minusBtn.setOnClickListener(新View.OnClickListener(){            公共无效的onClick(视图v){
                // TODO自动生成方法存根
                INT率=的Integer.parseInt(holder.rateEt.getText()
                        的ToString());
                如果(速度大于0){
                    率 - ;
        holder.rateEt.setText(Integer.toString(率));
                }
            }
        });        返回convertView;
    }    静态类ViewHolder {
        公众的TextView ratingTv;
        公共按钮minusBtn,plusBtn;
        公众的EditText rateEt;
        公共按钮rateBtn;
    }
}


解决方案

  TextView的电视=(TextView中)getViewById(R.id.myTextView);
等的EditText =(EditText上)getViewById(R.id.myEditText);
按钮B =(按钮)getViewById(R.id.myButton);
b.setOnClickListener(新OnClickListener(){
    公共无效的onClick(视图v){
        tv.setText(et.getText());
    }
});

这可能需要一些调整,因为我还没有测试出来(如为CharSequence为String铸)。

I have a custom listView with a textView, editText and a Button on a row. The listView is created with an adapter.
I want to update the textView with the value entered in editText when I press the button.I want to do this without refreshing the entire list.
Any ideea how can I update only one row from the list?
Thanks!

To be more clear I'll provide the code:

private static class EfficientAdapter extends BaseAdapter { private LayoutInflater mInflater; Context myContext;

    public EfficientAdapter(Context context) {
        mInflater = LayoutInflater.from(context);
        myContext = context;
    }

    public int getCount() {
        return nameList.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View convertView,
            ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.travelpassengers_item,
                    null);
            holder = new ViewHolder();
            holder.ratingTv = (TextView) convertView
                    .findViewById(R.id.tvTPRating);

            holder.rateBtn = (Button) convertView
                    .findViewById(R.id.btnTPRate);
            holder.plusBtn = (Button) convertView
                    .findViewById(R.id.btnPlus);
            holder.minusBtn = (Button) convertView
                    .findViewById(R.id.btnMinus);
            holder.rateEt = (EditText) convertView
                    .findViewById(R.id.etTPRating);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.ratingTv.setText(rating[position] + "/10");

        holder.callBtn.setTag(phoneList[position]);

        holder.ratingBtn.setTag(ids[position]);
        holder.ratingDisableBtn.setTag(numberRates[position]);
        holder.ratingTv.setTag(rating[position]);
        holder.rateEt.setTag(position);

        holder.rateBtn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                        String id = holder.ratingBtn.getTag().toString();
                        int position = Integer.parseInt(holder.rateEt
                                .getTag().toString());
                        double oldRate = Double
                                .parseDouble(rating[position]);
                        int number = numberRates[position];
                        double newRate = Double.parseDouble(holder.rateEt
                                .getText().toString());

                        DecimalFormat oneDigit = new DecimalFormat(
                                "#,##0.0");
                        number++;
                        double avg = (oldRate + newRate) / number;
                        newRate = Double.valueOf(oneDigit.format(avg));
                    // I want to put the value from newRate in the holder.ratingTv on right position without updating entire listView.

                }
            }
        });

        holder.plusBtn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                int rate = Integer.parseInt(holder.rateEt.getText()
                        .toString());
                if (rate < 10) {
                    rate++;
            holder.rateEt.setText(Integer.toString(rate));
                }
            }
        });

        holder.minusBtn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                int rate = Integer.parseInt(holder.rateEt.getText()
                        .toString());
                if (rate > 0) {
                    rate--;
        holder.rateEt.setText(Integer.toString(rate));
                }
            }
        });

        return convertView;
    }

    static class ViewHolder {
        public TextView  ratingTv;
        public Button minusBtn, plusBtn;
        public EditText rateEt;
        public Button rateBtn;
    }
}
解决方案
TextView tv = (TextView) getViewById(R.id.myTextView);
EditText et = (EditText) getViewById(R.id.myEditText);
Button b = (Button) getViewById(R.id.myButton);
b.setOnClickListener(new OnClickListener(){
    public void onClick(View v) {
        tv.setText(et.getText());
    }
});

This may require some tweaking, as I haven't tested it out (such as a cast from CharSequence to String).

这篇关于从项目在自定义的ListView的Andr​​oid更新的TextView的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-01 16:22