在ListView的多行中为多个TextView设置onClickListener

时间：2014-12-11 00:38:13

标签： android listview textview onclicklistener

我已根据ListView调用的数据数据设置了ArrayList<ArrayList<String>> 

data = {{"cat1","cat2","cat3","cat4"},
                      {"dog1","dog2","dog3"},
                      {"lion1"},
                      {"monkey1","monkey2"}};

我已经这样设置了：

public static final String[] weekdayStringArray = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
         ArrayList<String> stringArrayList = data.get(position);
         String dayString = weekdayStringArray[dayNumber];

         switch(stringArrayList.size()){
            case 4:
                convertView = mLayoutInflater.inflate(R.layout.four_meal_item_view, parent, false);
                TextView mealOne_Four = (TextView) convertView.findViewById(R.id.firstMealTextView);
                TextView mealTwo_Four = (TextView) convertView.findViewById(R.id.secondMealTextView);
                TextView mealThree_Four = (TextView) convertView.findViewById(R.id.thirdMealTextView);
                TextView mealFour_Four = (TextView) convertView.findViewById(R.id.fourthMealTextView);
                TextView dayText_Four = (TextView) convertView.findViewById(R.id.dayTextView);
                dayText_Four.setText(dayString);
                mealOne_Four.setText(stringArrayList.get(0).substring(0,1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
                mealTwo_Four.setText(stringArrayList.get(1).substring(0,1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
                mealThree_Four.setText(stringArrayList.get(2).substring(0,1).toUpperCase() + stringArrayList.get(2).substring(1).toLowerCase());
                mealFour_Four.setText(stringArrayList.get(3).substring(0,1).toUpperCase() + stringArrayList.get(3).substring(1).toLowerCase());
                break;
            case 3:
                convertView = mLayoutInflater.inflate(R.layout.three_meal_item_view, parent, false);
                TextView mealOne_Three = (TextView) convertView.findViewById(R.id.firstMealTextView_Three);
                TextView mealTwo_Three = (TextView) convertView.findViewById(R.id.secondMealTextView_Three);
                TextView mealThree_Three = (TextView) convertView.findViewById(R.id.thirdMealTextView_Three);
                TextView dayText_Three = (TextView) convertView.findViewById(R.id.dayTextView_Three);
                dayText_Three.setText(dayString);
                mealOne_Three.setText(stringArrayList.get(0).substring(0,1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
                mealTwo_Three.setText(stringArrayList.get(1).substring(0,1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
                mealThree_Three.setText(stringArrayList.get(2).substring(0,1).toUpperCase() + stringArrayList.get(2).substring(1).toLowerCase());
                break;
            case 2:
                convertView = mLayoutInflater.inflate(R.layout.two_meal_item_view, parent, false);
                TextView mealOne_Two = (TextView) convertView.findViewById(R.id.firstMealTextView_Two);
                TextView mealTwo_Two = (TextView) convertView.findViewById(R.id.secondMealTextView_Two);
                TextView dayText_Two = (TextView) convertView.findViewById(R.id.dayTextView_Two);
                dayText_Two.setText(dayString);
                mealOne_Two.setText(stringArrayList.get(0).substring(0,1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
                mealTwo_Two.setText(stringArrayList.get(1).substring(0,1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
                break;
            case 1:
                convertView = mLayoutInflater.inflate(R.layout.one_meal_item_view, parent, false);
                TextView mealOne_One = (TextView) convertView.findViewById(R.id.firstMealTextView_One);
                TextView dayText_One = (TextView) convertView.findViewById(R.id.dayTextView_One);
                dayText_One.setText(dayString);
                mealOne_One.setText(stringArrayList.get(0).substring(0,1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
                break;
            case 0:
                convertView = mLayoutInflater.inflate(R.layout.zero_meal_item_view, parent, false);
                TextView dayText_Zero = (TextView) convertView.findViewById(R.id.dayTextView_Zero);
                dayText_Zero.setText(dayString + "(Closed)");
                break;
         }
return convertView;

现在我要添加onClickListener，以便我可以连续点击TextView。单击此TextView后，我将移至新Activity，传递所点击的TextView文本以及与{{1}位于同一行的dayTextView文本点击了。

现在我不想为每个TextView设置一堆onClickListners，那么对所有TextView执行此操作的高效方式是什么？在我TextView的行中？

5 个答案:

答案 0 :(得分：1)

选项1：

在每个textView的xml中，将onClick设置为相同的方法

android:onClick= "itemtapped"

然后在您的活动中点击调用项目，让它获取textview名称和位置编号，以便您知道哪一个被点击。

选项2：

在活动中制作自定义功能，该功能会获取已点击的项目

像这样的东西

       public void setOnClickListener(TextView... arrayOfView, int position){

     TextView[] ]textViewArray = textViewArray;

    for(int i = 0 ; i < textViewArray.length ; ++i){

        int index = i; 
        textViewArray[i].setOnClickListener(new OnClickListener(){

                @Override
                public void onClick(View v){
                     Intent intent = new Intent(MainActivity.this, YourTargetActivity.class);
                     startActivity(intent);
                     int textViewNumber = position;

                }
        });
    }

然后传递位置，以便你知道它是什么以及该行中的textview

快乐编码：）

答案 1 :(得分：0)

您可以在convertView中查找TextView实例的任何子项。此方法使用广度优先搜索算法搜索TextView实例。 

private void setOnClickListenerOnTextViews(View contentViev, OnClickListener listener) {
            ArrayList<View> unvisited = new ArrayList<View>();
            unvisited.add(contentView);
            while (!unvisited.isEmpty()) {
                View child = unvisited.remove(0);
                if(child instanceof TextView) {
                    child.setOnClickListener(listener);
                    continue;
                }
                if (!(child instanceof ViewGroup)){
                    continue;
                }
                ViewGroup group = (ViewGroup) child;
                final int childCount = group.getChildCount();
                for (int i=0; i< childCount; i++){
                    unvisited.add(group.getChildAt(i));
                }
            }
           }
}

在getView（）方法中调用此方法：

public View getView(.....){
//...
setOnClickListenerOnTextViews(convertView,mClickListener)
return convertView;
}

编辑：为了复制和粘贴解决方案，mClickListener是代码中某处的侦听器实例：

private View.OnClickListener mClickListener = new View.OnclickListerner(){
 @Override
 public void onClick(View v){
   //do your thing here.
 }
};

答案 2 :(得分：0)

最有效的方法是为每个TextView手动设置点击监听器。为什么？因为你已经找到它们(findViewById)所以再次遍历视图树真是个坏主意(Breadth First Search)。所以你所能做的就是创建一个函数，然后将TextViews传递给它。你可以做一些重构来获得干净的代码。

       public void addClickListenerToTextView(TextView... textViewArray){

        final TextView[] finalTextViewArray = textViewArray;

        for(int i = 0 ; i < finalTextViewArray.length-1 ; ++i){

            final int index = i; 
            textViewArray[i].setOnClickListener(new OnClickListener(){

                    @Override
                    public void onClick(View v){
                         Intent intent = new Intent(MainActivity.this, YourTargetActivity.class);
                         intent.putExtra("meal" + index ,finalTextViewArray[index].getText().toString());
                         intent.putExtra("dayText" , finalTextViewArray[finalTextViewArray.length-1].getText().toString());
                         startActivity(intent);

                    }
            });
        }
    }

然后你可以像这样调用这个函数：

 addClickListenerToTextView(mealOne_Three,mealTwo_Three,mealThree_Three,dayText_Three);

因此，在每次休息之前，请使用该行的所有textview调用上述函数。请注意，您必须始终将day textview作为最后一个textview。

答案 3 :(得分：0)

您可以执行类似通用OnClickListener的内容，其中包含新Activity所需的所有信息：

public static final String[] weekdayStringArray = DateFormatSymbols.getInstance().getWeekdays();

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ArrayList<String> stringArrayList = getItem(position);
    String dayString = weekdayStringArray[dayNumber];

    MyClickListener myClicker = new MyClickListener(dayString);

    switch (stringArrayList.size()) {
    case 4:
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.four_meal_item_view, parent, false);
        TextView mealOne_Four = (TextView) convertView.findViewById(R.id.firstMealTextView);
        TextView mealTwo_Four = (TextView) convertView.findViewById(R.id.secondMealTextView);
        TextView mealThree_Four = (TextView) convertView.findViewById(R.id.thirdMealTextView);
        TextView mealFour_Four = (TextView) convertView.findViewById(R.id.fourthMealTextView);
        TextView dayText_Four = (TextView) convertView.findViewById(R.id.dayTextView);
        dayText_Four.setText(dayString);
        mealOne_Four.setText(stringArrayList.get(0).substring(0, 1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
        mealTwo_Four.setText(stringArrayList.get(1).substring(0, 1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
        mealThree_Four
                .setText(stringArrayList.get(2).substring(0, 1).toUpperCase() + stringArrayList.get(2).substring(1).toLowerCase());
        mealFour_Four.setText(stringArrayList.get(3).substring(0, 1).toUpperCase() + stringArrayList.get(3).substring(1).toLowerCase());
        applyClickListeners(myClicker, mealOne_Four, mealTwo_Four, mealThree_Four, mealFour_Four, dayText_Four);
        break;
    case 3:
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.three_meal_item_view, parent, false);
        TextView mealOne_Three = (TextView) convertView.findViewById(R.id.firstMealTextView_Three);
        TextView mealTwo_Three = (TextView) convertView.findViewById(R.id.secondMealTextView_Three);
        TextView mealThree_Three = (TextView) convertView.findViewById(R.id.thirdMealTextView_Three);
        TextView dayText_Three = (TextView) convertView.findViewById(R.id.dayTextView_Three);
        dayText_Three.setText(dayString);
        mealOne_Three.setText(stringArrayList.get(0).substring(0, 1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
        mealTwo_Three.setText(stringArrayList.get(1).substring(0, 1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
        mealThree_Three.setText(stringArrayList.get(2).substring(0, 1).toUpperCase()
                + stringArrayList.get(2).substring(1).toLowerCase());
        applyClickListeners(myClicker, mealOne_Three, mealTwo_Three, mealThree_Three, dayText_Three);
        break;
    case 2:
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.two_meal_item_view, parent, false);
        TextView mealOne_Two = (TextView) convertView.findViewById(R.id.firstMealTextView_Two);
        TextView mealTwo_Two = (TextView) convertView.findViewById(R.id.secondMealTextView_Two);
        TextView dayText_Two = (TextView) convertView.findViewById(R.id.dayTextView_Two);
        dayText_Two.setText(dayString);
        mealOne_Two.setText(stringArrayList.get(0).substring(0, 1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
        mealTwo_Two.setText(stringArrayList.get(1).substring(0, 1).toUpperCase() + stringArrayList.get(1).substring(1).toLowerCase());
        applyClickListeners(myClicker, mealOne_Two, mealTwo_Two, dayText_Two);
        break;
    case 1:
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.one_meal_item_view, parent, false);
        TextView mealOne_One = (TextView) convertView.findViewById(R.id.firstMealTextView_One);
        TextView dayText_One = (TextView) convertView.findViewById(R.id.dayTextView_One);
        dayText_One.setText(dayString);
        mealOne_One.setText(stringArrayList.get(0).substring(0, 1).toUpperCase() + stringArrayList.get(0).substring(1).toLowerCase());
        applyClickListeners(myClicker, mealOne_One, dayText_One);
        break;
    case 0:
        convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.zero_meal_item_view, parent, false);
        TextView dayText_Zero = (TextView) convertView.findViewById(R.id.dayTextView_Zero);
        dayText_Zero.setText(dayString + "(Closed)");
        applyClickListeners(myClicker, dayText_Zero);
        break;
    }
    return convertView;
}

private void applyClickListeners(MyClickListener clicker, View... toApply) {
    for (View view : toApply) {
        view.setOnClickListener(clicker);
    }
}

class MyClickListener implements View.OnClickListener {

    private String dayText;

    public MyClickListener(String dayText) {
        this.dayText = dayText;
    }

    @Override
    public void onClick(View v) {
        // do your thing
    }

}

答案 4 :(得分：0)

在Activity上实现Listener，然后将活动作为侦听器传递给每个可单击的项目。这样你只需要创建一个监听器，它不会泄漏内存，如果你必须改变项目的显示方式，你就不必改变每一个监听器。

  1. 在适配器中创建SoftReference以安全地存储活动
  2. 将活动传递给每个textview作为侦听器
  3. 在活动
    4. 中实现View.OnClickListener
  4. 投放您已传回TextView的视图
  5. 创建新意图
  6. 获取文字，将其附加到意图
  7. 开始新活动
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