ListView套用EditText完美解决方案

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EditText是安卓的标准输入控件，也是最长用的控件，被认为是很简单的，但是当这个最简单、易用的控件碰上ListView列表控件的时候，坑爹的情况就出现了，焦点获取问题，输入的内容混乱问题、无法正常输入问题等等，总之就是简单的控件让开发变得头疼不已。究其原因，ListView的自条目会复用控件，导致edittext数据混乱，焦点的获取出现问题。遇到过问题的，都明白是怎么回事，这里不再截图展示问题，只是把解决方案和代码共享出来。废话少说，直接上代码：

package com.hongzhen.demo.activity;import android.app.Activity;import android.os.Bundle;import android.support.annotation.Nullable;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.Toast;import com.hongzhen.demo.R;import com.hongzhen.demo.adapter.EdittextAdapter;import com.hongzhen.demo.bean.ItemBean;import java.util.ArrayList;import java.util.List;/** * Created by hongzhen on 2017/9/4. */public class EditTextListViewActivity extends Activity {    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_edittext_listview);        ListView listView = (ListView) findViewById(R.id.list_view);        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Toast.makeText(EditTextListViewActivity.this, "toast: " + position, Toast.LENGTH_SHORT).show();            }        });        List<ItemBean> list = new ArrayList<>();        for (int i = 0; i < 50; i++) {            ItemBean itemTest = new ItemBean();            itemTest.setText("第"+i + "项");            list.add(itemTest);        }        EdittextAdapter adapter = new EdittextAdapter( list,this);        listView.setAdapter(adapter);    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="match_parent"              android:layout_height="match_parent">    <ListView        android:layout_margin="5dp"        android:id="@+id/list_view"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:dividerHeight="5dp" /></LinearLayout>

package com.hongzhen.demo.adapter;import android.content.Context;import android.text.TextWatcher;import android.util.Log;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.EditText;import android.widget.Toast;import com.hongzhen.demo.R;import com.hongzhen.demo.bean.ItemBean;import com.hongzhen.demo.watcher.MyTextWatcher;import java.util.List;/** * Created by hongzhen on 2017/9/4. */public class EdittextAdapter extends BaseAdapter implements View.OnClickListener, View.OnTouchListener, View.OnFocusChangeListener, View.OnLongClickListener {    private int selectedEditTextPosition = -1;    private List<ItemBean> mList;    private Context mContext;    public EdittextAdapter(List<ItemBean> mList,Context mContext) {        this.mContext=mContext;        this.mList = mList;    }    @Override    public int getCount() {        return mList.size();    }    @Override    public Object getItem(int position) {        return mList.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup viewGroup) {        ViewHolder vh;        if (convertView == null) {            convertView = LayoutInflater.from(mContext).inflate(R.layout.item_edittext_listview, null);            vh = new ViewHolder(convertView);            convertView.setTag(vh);        } else {            vh = (ViewHolder) convertView.getTag();        }        vh.editText.setOnTouchListener(this); // 正确写法        vh.editText.setOnFocusChangeListener(this);        vh.editText.setTag(position);        if (selectedEditTextPosition != -1 && position == selectedEditTextPosition) { // 保证每个时刻只有一个EditText能获取到焦点            vh.editText.requestFocus();        } else {            vh.editText.clearFocus();        }        String text = mList.get(position).getText();        vh.editText.setText(text);        vh.editText.setSelection(vh.editText.length());        convertView.setTag(R.id.item_root, position); // 应该在这里让convertView绑定position        convertView.setOnClickListener(this);        convertView.setOnLongClickListener(this);        return convertView;    }    private TextWatcher mTextWatcher = new MyTextWatcher() {        @Override        public void onTextChanged(CharSequence s, int start, int before, int count) {            if (selectedEditTextPosition != -1) {                Log.w("MyEditAdapter", "onTextPosiotion " + selectedEditTextPosition);                ItemBean itemTest = (ItemBean) getItem(selectedEditTextPosition);                itemTest.setText(s.toString());            }        }    };    @Override    public boolean onTouch(View v, MotionEvent event) {        if (event.getAction() == MotionEvent.ACTION_UP) {            EditText editText = (EditText) v;            selectedEditTextPosition = (int) editText.getTag();        }        return false;    }    @Override    public void onFocusChange(View v, boolean hasFocus) {        EditText editText = (EditText) v;        if (hasFocus) {            editText.addTextChangedListener(mTextWatcher);        } else {            editText.removeTextChangedListener(mTextWatcher);        }    }    @Override    public void onClick(View view) {        if (view.getId() == R.id.item_root) {            int position = (int) view.getTag(R.id.item_root);            Toast.makeText(mContext, "点击第 " + position + " 个item", Toast.LENGTH_SHORT).show();        }    }    @Override    public boolean onLongClick(View view) {        if (view.getId() == R.id.item_root) {            int position = (int) view.getTag(R.id.item_root);            Toast.makeText(mContext, "长按第 " + position + " 个item", Toast.LENGTH_SHORT).show();        }        return true;    }    public class ViewHolder {        EditText editText;        public ViewHolder(View convertView) {            editText = (EditText) convertView.findViewById(R.id.et_test);        }    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/item_root"    android:layout_width="match_parent"    android:layout_height="50dp"    android:background="#aaa"    android:gravity="center"    android:orientation="vertical">    <EditText        android:textColor="#fff"        android:id="@+id/et_test"        android:layout_width="200dp"        android:layout_height="50dp"        android:layout_gravity="left"        android:gravity="center"        android:singleLine="true"        android:textSize="20dp" /></LinearLayout>

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