Java 如何在Android中从ListView和Adapter中获取所选文本？

我花了几个小时试图解决这个问题，虽然我已经接近，但我没有得到我需要的结果。我有一个消息传递应用程序，它有一个自定义适配器和一个包含大约5个文本视图的listview。我的问题是当用户长按消息时检索文本。在尝试了各种方法之后，我最接近的方法是：

        mListView.setOnItemLongClickListener( new AdapterView.OnItemLongClickListener
            (){


    public boolean onItemLongClick(AdapterView<?> av, View v, int pos, long id) {

        final String test = ((TextView)v).getText().toString();
        Log.i(TAG, "Received: " + test);


        return true;

        }
            }); 

奇怪的是，我在最初几次成功地获得了正确的消息字符串，然后它就不想工作了。在查找错误之后，我尝试了多次清理项目，删除R.java文件，关闭Eclipse，但是没有任何效果

我也尝试过使用消息的位置号。当获取消息的位置号时，应用程序从未强制关闭，但是我无法获取附加到该位置消息的字符串。错误与尝试从整数转换为字符串有关：

String test = ((EditText)av.getItemAtPosition(pos)).getText().toString();

我的xml文件包括：

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

<LinearLayout
    android:id="@+id/left"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_margin="20dip"
    android:background="@drawable/bubble_yellow"
    android:gravity="left"
    android:orientation="vertical"
    android:visibility="invisible" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:paddingBottom="1dip"
        android:paddingLeft="15dip"
        android:paddingRight="20dip"
        android:paddingTop="1dip"
        android:singleLine="false"
        android:text="Large Text"
        android:longClickable="true"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:gravity="right"
        android:paddingRight="20dip"
        android:longClickable="true"
        android:text="TextView" />
</LinearLayout>

<LinearLayout
    android:id="@+id/right"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_margin="20dip"
    android:background="@drawable/bubble_green"
    android:orientation="vertical"
    android:visibility="invisible" >

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingBottom="1dip"
        android:paddingLeft="15dip"
        android:paddingRight="20dip"
        android:paddingTop="1dip"
        android:singleLine="false"
        android:longClickable="true"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:gravity="right"
        android:longClickable="true"
        android:paddingRight="20dip"
        android:text="TextView" />
   </LinearLayout>

 </RelativeLayout>

更新3：我尽了最大努力遵循@MDragon00的建议，不幸的是，我的应用程序在长时间按下时仍然崩溃。我现在有：

        mListView.setOnItemLongClickListener( new AdapterView.OnItemLongClickListener
            (){


    public boolean onItemLongClick(AdapterView<?> av, View v, int pos, long id) {


        TextView textView1 = (TextView) v.findViewById(R.id.textView1);
        TextView textView2 = (TextView) v.findViewById(R.id.textView2);
        TextView textView3 = (TextView) v.findViewById(R.id.textView3);
        TextView textView4 = (TextView) v.findViewById(R.id.textView4);

        View.OnLongClickListener listener = new View.OnLongClickListener() {

            @Override
            public boolean onLongClick(View v) {

                TextView textView = (TextView) v;
                String text = textView.getText().toString();
                Log.i(TAG, "Text Selected = " + text);
                return false;
            }
        };

        textView1.setOnLongClickListener(listener);
        textView2.setOnLongClickListener(listener);
        textView3.setOnLongClickListener(listener);
        textView4.setOnLongClickListener(listener);

        return true;

        }
            }); 



}

mListView.setOnItemLongClickListener（新的AdapterView.OnItemLongClickListener
(){
长点击（AdapterView av、View v、int pos、long id）{
TextView textView1=（TextView）v.findViewById（R.id.textView1）；
TextView textView2=（TextView）v.findViewById（R.id.textView2）；
TextView textView3=（TextView）v.findViewById（R.id.textView3）；
TextView textView4=（TextView）v.findViewById（R.id.textView4）；
View.OnLongClickListener=新建视图。OnLongClickListener（）{
@凌驾
仅长按公共布尔值（视图v）{
TextView TextView=（TextView）v；
String text=textView.getText（）.toString（）；
Log.i（标记，“选择的文本=”+文本）；
返回false；
}
};
textView1.setOnLongClickListener（listener）；
textView2.setOnLongClickListener（listener）；
textView3.setOnLongClickListener（listener）；
textView4.setOnLongClickListener（listener）；
返回true；
}
}); 
}

每个参数在单击时的作用说明：

这里的问题是，

av

是整个列表视图，而

v

是整个行。您的行不只是由TextView组成，因此无法将其强制转换为TextView。换句话说,

final String test = ((TextView)v).getText().toString();

这不是一个好主意，因为父视图是相对的。更好的解决方案是执行以下操作：

        ViewHolder viewHolder;
 MessageModel array = data.get(position);
    if (convertView == null) {
        viewHolder = new ViewHolder();
        convertView = inflater.inflate(R.layout.message_item, null);
        viewHolder.left =(LinearLayout)convertView.findViewById(R.id.left);
        viewHolder.right =(LinearLayout)convertView.findViewById(R.id.right);
        viewHolder.txt1 = (TextView) convertView
                .findViewById(R.id.textView1);
        viewHolder.txt3 = (TextView) convertView
                .findViewById(R.id.textView3);
        viewHolder.txt2 = (TextView) convertView
                .findViewById(R.id.textView2);
        viewHolder.txt4 = (TextView) convertView
                .findViewById(R.id.textView4);

        convertView.setTag(viewHolder);

TextView textView = (TextView) v.findViewById(R.id.idOfTextView);
String text = textView.getText().toString();

作为一个小建议，听起来您只需单击该项目，而不是长时间单击它。如果适合您的需要，请使用OnItemClickListener而不是OnItemLongClickListener

编辑： 根据您的评论，用户将单击/点击某个抽象行中多个文本视图中的某个文本视图，您希望获得这四个文本视图中的一个

为此，您需要在每个TextView上安装一个新的侦听器。如果没有看到适配器，我无法给出准确的答案，但是当您在适配器中膨胀/获取要提供给ListView的行视图时，请将OnClickListener设置为TextView。例如，使用一些伪代码：

// Get the textViews, to assign a listener to them
TextView textView1 = (TextView) v.findViewById(R.id.textView1);
TextView textView2 = (Textview) v.findViewById(R.id.textView2);
..... // Etc and so on

// Create this listener anywhere, including via making the adapter/class
    // implement the listener and passing it in instead
View.OnClickListener listener = new View.OnClickListener(
    @Override
    public void onClick(View v) {
        // Get the view as a TextView, as this will only be used
            // with TextViews, so the only view to be passed
            // will be Textviews
        TextView textView = (TextView) v;

        // Do whatever with that text, or however you want to use the view
        String text = textView.getText().toString();
        someFunction(text);
    }
);

textView1.setOnClickListener(listener);
textView2.setOnClickListener(listener);
..... // Etc and so on

现在，如果您需要单击的精确行和精确文本视图中的文本，那么您需要使用两个侦听器（即，ListView上的一个和TextView上的一个）来获取适当的数据

编辑最终版本：

public class TestAdapter extends BaseAdapter {
    Context mContext;

    public TestAdapter (Context context, Data someData) {
        this.mContext = context;

        // Set up the data for your listView however
    }
    @Override
    public int getCount() {
        return howManyRows;
    }

    @Override
    public Object getItem(int position) {
        return objectAtPosition;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    } // Unnecessary, unless using databases

    // The listener for the textViews, feel free to use different listeners
    View.OnClickListener TextViewListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Get the view as a TextView, as this will only be used
            // with TextViews, so the only view to be passed
            // will be Textviews
            TextView textView = (TextView) v;

            // Do whatever with that text, or however you want to use the view
            String text = textView.getText().toString();
            someFunction(text);
        }
    };

    // Using the efficient pattern for recycling the views rather than using
    // findViewById repeatedly
    public static class ViewHolder{
        public TextView textView1;
        public TextView textView2;
        public TextView textView3;
        public TextView textView4;

        // And any other view that's part of the row view that you need
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = null;
        ViewHolder holder;

        if(convertView == null) {
            // Then gotta set up this row for the first time
            LayoutInflater inflater =
                    (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.row_layout.xml, parent, false);

            // Create a ViewHolder to save all the different parts of the row
            holder = new ViewHolder();
            holder.textView1 = (TextView) row.findViewById(R.id.textView1);
            holder.textView2 = (TextView) row.findViewById(R.id.textView2);
            holder.textView3 = (TextView) row.findViewById(R.id.textView3);
            holder.textView4 = (TextView) row.findViewById(R.id.textView4);

            // Make the row reuse the ViewHolder
            row.setTag(holder);
        }
        else { // Otherwise, use the recycled view
            row = convertView;
            holder = (ViewHolder) row.getTag();
        }

        // Set the current row's Textview onClickListeners
            // Note: You MAY be able to only set these once- feel free to set that
        holder.textView1.setOnClickListener(TextViewListener);
        holder.textView2.setOnClickListener(TextViewListener);
        holder.textView3.setOnClickListener(TextViewListener);
        holder.textView4.setOnClickListener(TextViewListener);

        // Set up the rest of the views however you need
            /*.....
              ......
             */

        return row;
    }
}

---

每个参数在单击时的作用说明：

这里的问题是，

av

是整个列表视图，而

v

是整个行。您的行不只是由TextView组成，因此无法将其强制转换为TextView。换句话说,

final String test = ((TextView)v).getText().toString();

这不是一个好主意，因为父视图是相对的。更好的解决方案是执行以下操作：

        ViewHolder viewHolder;
 MessageModel array = data.get(position);
    if (convertView == null) {
        viewHolder = new ViewHolder();
        convertView = inflater.inflate(R.layout.message_item, null);
        viewHolder.left =(LinearLayout)convertView.findViewById(R.id.left);
        viewHolder.right =(LinearLayout)convertView.findViewById(R.id.right);
        viewHolder.txt1 = (TextView) convertView
                .findViewById(R.id.textView1);
        viewHolder.txt3 = (TextView) convertView
                .findViewById(R.id.textView3);
        viewHolder.txt2 = (TextView) convertView
                .findViewById(R.id.textView2);
        viewHolder.txt4 = (TextView) convertView
                .findViewById(R.id.textView4);

        convertView.setTag(viewHolder);

TextView textView = (TextView) v.findViewById(R.id.idOfTextView);
String text = textView.getText().toString();

作为一个小建议，听起来您只需单击该项目，而不是长时间单击它。如果适合您的需要，请使用OnItemClickListener而不是OnItemLongClickListener

编辑： 根据您的评论，用户将单击/点击某个抽象行中多个文本视图中的某个文本视图，您希望获得这四个文本视图中的一个

为此，您需要在每个TextView上安装一个新的侦听器。如果没有看到适配器，我无法给出准确的答案，但是当您在适配器中膨胀/获取要提供给ListView的行视图时，请将OnClickListener设置为TextView。例如，使用一些伪代码：

// Get the textViews, to assign a listener to them
TextView textView1 = (TextView) v.findViewById(R.id.textView1);
TextView textView2 = (Textview) v.findViewById(R.id.textView2);
..... // Etc and so on

// Create this listener anywhere, including via making the adapter/class
    // implement the listener and passing it in instead
View.OnClickListener listener = new View.OnClickListener(
    @Override
    public void onClick(View v) {
        // Get the view as a TextView, as this will only be used
            // with TextViews, so the only view to be passed
            // will be Textviews
        TextView textView = (TextView) v;

        // Do whatever with that text, or however you want to use the view
        String text = textView.getText().toString();
        someFunction(text);
    }
);

textView1.setOnClickListener(listener);
textView2.setOnClickListener(listener);
..... // Etc and so on

现在，如果您需要单击的精确行和精确文本视图中的文本，那么您需要使用两个侦听器（即，ListView上的一个和TextView上的一个）来获取适当的数据

编辑最终版本：

public class TestAdapter extends BaseAdapter {
    Context mContext;

    public TestAdapter (Context context, Data someData) {
        this.mContext = context;

        // Set up the data for your listView however
    }
    @Override
    public int getCount() {
        return howManyRows;
    }

    @Override
    public Object getItem(int position) {
        return objectAtPosition;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    } // Unnecessary, unless using databases

    // The listener for the textViews, feel free to use different listeners
    View.OnClickListener TextViewListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Get the view as a TextView, as this will only be used
            // with TextViews, so the only view to be passed
            // will be Textviews
            TextView textView = (TextView) v;

            // Do whatever with that text, or however you want to use the view
            String text = textView.getText().toString();
            someFunction(text);
        }
    };

    // Using the efficient pattern for recycling the views rather than using
    // findViewById repeatedly
    public static class ViewHolder{
        public TextView textView1;
        public TextView textView2;
        public TextView textView3;
        public TextView textView4;

        // And any other view that's part of the row view that you need
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = null;
        ViewHolder holder;

        if(convertView == null) {
            // Then gotta set up this row for the first time
            LayoutInflater inflater =
                    (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.row_layout.xml, parent, false);

            // Create a ViewHolder to save all the different parts of the row
            holder = new ViewHolder();
            holder.textView1 = (TextView) row.findViewById(R.id.textView1);
            holder.textView2 = (TextView) row.findViewById(R.id.textView2);
            holder.textView3 = (TextView) row.findViewById(R.id.textView3);
            holder.textView4 = (TextView) row.findViewById(R.id.textView4);

            // Make the row reuse the ViewHolder
            row.setTag(holder);
        }
        else { // Otherwise, use the recycled view
            row = convertView;
            holder = (ViewHolder) row.getTag();
        }

        // Set the current row's Textview onClickListeners
            // Note: You MAY be able to only set these once- feel free to set that
        holder.textView1.setOnClickListener(TextViewListener);
        holder.textView2.setOnClickListener(TextViewListener);
        holder.textView3.setOnClickListener(TextViewListener);
        holder.textView4.setOnClickListener(TextViewListener);

        // Set up the rest of the views however you need
            /*.....
              ......
             */

        return row;
    }
}

---

每个参数在单击时的作用说明：

这里的问题是，

av

是整个列表视图，而

v

是整个行。您的行不只是由TextView组成，因此无法将其强制转换为TextView。换句话说,

final String test = ((TextView)v).getText().toString();

这不是一个好主意，因为父视图是相对的。更好的解决方案是执行以下操作：

        ViewHolder viewHolder;
 MessageModel array = data.get(position);
    if (convertView == null) {
        viewHolder = new ViewHolder();
        convertView = inflater.inflate(R.layout.message_item, null);
        viewHolder.left =(LinearLayout)convertView.findViewById(R.id.left);
        viewHolder.right =(LinearLayout)convertView.findViewById(R.id.right);
        viewHolder.txt1 = (TextView) convertView
                .findViewById(R.id.textView1);
        viewHolder.txt3 = (TextView) convertView
                .findViewById(R.id.textView3);
        viewHolder.txt2 = (TextView) convertView
                .findViewById(R.id.textView2);
        viewHolder.txt4 = (TextView) convertView
                .findViewById(R.id.textView4);

        convertView.setTag(viewHolder);

TextView textView = (TextView) v.findViewById(R.id.idOfTextView);
String text = textView.getText().toString();

作为一个小建议，听起来您只需单击该项目，而不是长时间单击它。如果适合您的需要，请使用OnItemClickListener而不是OnItemLongClickListener

编辑： 根据您的评论，用户将单击/点击某个抽象行中多个文本视图中的某个文本视图，您希望获得这四个文本视图中的一个

为此，您需要在每个TextView上安装一个新的侦听器。如果没有看到您的适配器，我无法给出确切的答案，但是当您