列表视图中的按钮在滚动和按钮单击时产生问题
我在列表视图中的一些列表项中有三个按钮，单击该按钮我想更改该列表项的布局，但我面临的问题列在下面。
1）。单击按钮，另一个列表项布局将更改。 2）。在列表视图的滚动中，另一个列表项目布局被更改为我没有单击的人。
这是适配器类的代码。
import java.util.ArrayList;
import com.xsinfosol.DOT.R;
import com.xsinfosol.DOT.ImageLoading.ImageLoader;
import com.xsinfosol.DOT.LibraryClasses.RippleView;
import com.xsinfosol.DOT.model.DOT_Common_Model;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.v7.internal.widget.ButtonBarLayout;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.WindowManager.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class Agenda_Adapter extends BaseAdapter {
Context context;
ArrayList<DOT_Common_Model> arrayList;
ViewHolder viewHolder;
public Agenda_Adapter(Context context , ArrayList<DOT_Common_Model> arrayList) {
// TODO Auto-generated constructor stub
this.context = context;
this.arrayList = arrayList;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return arrayList.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return arrayList.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(convertView==null)
{
viewHolder = new ViewHolder();
convertView = LayoutInflater.from
(context).inflate(R.layout.agenda_event_list_item, null);
viewHolder.linearLayout = (LinearLayout)convertView.findViewById(R.id.agenda_button_layout);
viewHolder.linearLayout.setVisibility(View.GONE);
viewHolder.checkBox = (CheckBox)convertView.findViewById(R.id.agenda_event_checkbox);
viewHolder.eventName = (TextView)convertView.findViewById(R.id.agenda_event_name);
viewHolder.imageView = (ImageView)convertView.findViewById(R.id.agenda_event_imae);
viewHolder.place = (TextView)convertView.findViewById(R.id.agenda_event_place);
viewHolder.time = (TextView)convertView.findViewById(R.id.agenda_event_date_time);
viewHolder.going = (RippleView)convertView.findViewById(R.id.agenda_rippleview_going);
viewHolder.notGoing = (RippleView)convertView.findViewById(R.id.agenda_rippleview_not_going);
viewHolder.mayBe = (RippleView)convertView.findViewById(R.id.agenda_rippleview_maybe);
viewHolder.going.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable tick = context.getResources().getDrawable(R.drawable.ic_action_tick);
tick.setBounds(0,0, 30, 30);
Button going = new Button(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
params.setMargins(10,0, 10, 4);
going.setLayoutParams(params);
going.setBackgroundColor(context.getResources().getColor(android.R.color.holo_green_dark));
going.setText("Going");
going.setTextSize(15);
going.setTextColor(R.color.white);
going.setCompoundDrawables(null, null, tick, null);
going.setCompoundDrawablePadding(5);
going.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(going);
}
});
viewHolder.notGoing.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable cross = context.getResources().getDrawable(R.drawable.ic_action_cancel);
cross.setBounds(0,0, 30, 30);
Button button = new Button(context);
LinearLayout.LayoutParams paramsCross = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
paramsCross.setMargins(10,0, 10, 4);
button.setLayoutParams(paramsCross);
button.setBackgroundColor(context.getResources().getColor(R.color.red));
button.setText("Not Going");
button.setTextSize(15);
button.setTextColor(R.color.white);
button.setCompoundDrawables(null, null, cross, null);
button.setCompoundDrawablePadding(5);
button.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(button);
}
});
viewHolder.mayBe.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable mayBe = context.getResources().getDrawable(R.drawable.ic_action_emo_err);
mayBe.setBounds(0,0, 30, 30);
Button maybe = new Button(context);
LinearLayout.LayoutParams paramsMaybe = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
paramsMaybe.setMargins(10,0, 10, 4);
maybe.setLayoutParams(paramsMaybe);
maybe.setBackgroundColor(context.getResources().getColor(R.color.yellow));
maybe.setText("May Be");
maybe.setTextSize(15);
maybe.setTextColor(R.color.white);
maybe.setCompoundDrawables(null, null, mayBe, null);
maybe.setCompoundDrawablePadding(5);
maybe.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(maybe);
}
});
viewHolder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
int getPosition = (Integer)buttonView.getTag();
arrayList.get(getPosition).setChecked(buttonView.isChecked());
}
});
convertView.setTag(viewHolder);
convertView.setTag(R.id.agenda_event_checkbox, viewHolder.checkBox);
convertView.setTag(R.id.agenda_event_imae, viewHolder.imageView);
convertView.setTag(R.id.agenda_event_name, viewHolder.eventName);
convertView.setTag(R.id.agenda_event_place, viewHolder.place);
convertView.setTag(R.id.agenda_event_date_time, viewHolder.time);
convertView.setTag(R.id.agenda_button_layout, viewHolder.linearLayout);
convertView.setTag(R.id.agenda_rippleview_going, viewHolder.going);
convertView.setTag(R.id.agenda_rippleview_not_going, viewHolder.notGoing);
convertView.setTag(R.id.agenda_rippleview_maybe, viewHolder.mayBe);
}else
viewHolder = (ViewHolder)convertView.getTag();
viewHolder.checkBox.setTag(position);
viewHolder.going.setTag(position);
viewHolder.notGoing.setTag(position);
viewHolder.mayBe.setTag(position);
ImageLoader imageLoader = new ImageLoader(context);
ImageView imageView = viewHolder.imageView;
imageLoader.DisplayImage(arrayList.get(position).getImage(), imageView);
viewHolder.checkBox.setChecked(arrayList.get(position).ischecked());
switch (arrayList.get(position).getFlag()) {
case "0":
// hasn's seleted any option
if(viewHolder.linearLayout.getVisibility()==View.GONE)
viewHolder.linearLayout.setVisibility(View.VISIBLE);
if(viewHolder.going.getVisibility()==View.GONE)
viewHolder.going.setVisibility(View.VISIBLE);
if(viewHolder.mayBe.getVisibility()==View.GONE)
viewHolder.mayBe.setVisibility(View.VISIBLE);
if(viewHolder.notGoing.getVisibility()==View.GONE)
viewHolder.notGoing.setVisibility(View.VISIBLE);
break;
case "1":
// selected going
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable tick = context.getResources().getDrawable(R.drawable.ic_action_tick);
tick.setBounds(0,0, 30, 30);
Button going = new Button(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
params.setMargins(10,0, 10, 4);
going.setLayoutParams(params);
going.setBackgroundColor(context.getResources().getColor(android.R.color.holo_green_dark));
going.setText("Going");
going.setTextSize(15);
going.setTextColor(context.getResources().getColor(R.color.white));
going.setCompoundDrawables(null, null, tick, null);
going.setCompoundDrawablePadding(5);
going.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(going);
break;
case "2":
// select not going
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable cross = context.getResources().getDrawable(R.drawable.ic_action_cancel);
cross.setBounds(0,0, 30, 30);
Button button = new Button(context);
LinearLayout.LayoutParams paramsCross = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
paramsCross.setMargins(10,0, 10, 4);
button.setLayoutParams(paramsCross);
button.setBackgroundColor(context.getResources().getColor(R.color.red));
button.setText("Not Going");
button.setTextSize(15);
button.setTextColor(context.getResources().getColor(R.color.white));
button.setCompoundDrawables(null, null, cross, null);
button.setCompoundDrawablePadding(5);
button.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(button);
break;
case "3":
// selected may be
viewHolder.going.setVisibility(View.GONE);
viewHolder.notGoing.setVisibility(View.GONE);
viewHolder.mayBe.setVisibility(View.GONE);
Drawable mayBe = context.getResources().getDrawable(R.drawable.ic_action_emo_err);
mayBe.setBounds(0,0, 30, 30);
Button maybe = new Button(context);
LinearLayout.LayoutParams paramsMaybe = new LinearLayout.LayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 40));
paramsMaybe.setMargins(10,0, 10, 4);
maybe.setLayoutParams(paramsMaybe);
maybe.setBackgroundColor(context.getResources().getColor(R.color.yellow));
maybe.setText("May Be");
maybe.setTextSize(15);
maybe.setTextColor(context.getResources().getColor(R.color.black_overlay));
maybe.setCompoundDrawables(null, null, mayBe, null);
maybe.setCompoundDrawablePadding(5);
maybe.setGravity(Gravity.CENTER);
if(viewHolder.linearLayout!=null)
viewHolder.linearLayout.removeAllViews();
viewHolder.linearLayout.addView(maybe);
break;
case "4":
// event doesn't have any invitatin option
if(viewHolder.linearLayout.getVisibility()==View.VISIBLE)
viewHolder.linearLayout.setVisibility(View.GONE);
break;
}
viewHolder.eventName.setText(arrayList.get(position).getName());
viewHolder.place.setText(arrayList.get(position).getPlace());
viewHolder.time.setText(arrayList.get(position).getTime());
return convertView;
}
static class ViewHolder
{
TextView eventName , place, time;
CheckBox checkBox;
ImageView imageView;
LinearLayout linearLayout;
RippleView going , notGoing , mayBe;
}
}
请帮助我，我非常困难，
4 个答案:
答案 0 :(得分：1)
第1步：在此行之后放置点击侦听器（viewHolder =（ViewHolder）convertView.getTag（））
第2步：在onclick方法中删除视图创建/删除逻辑。更改模型值（“在您的情况下当前项目标志”）并调用notifyDataset更改的方法
@Override
public void onClick(View view) {
//Set the flag based on your view click
((DOT_Common_Model) getItem( int position)).setFlag(0);
notifyDatasetChanged();
}
第3步：根据您的模型值更改视图（“标记值”）
if(((DOT_Common_Model) getItem( int position)).getFlag()==0){
view1.setVisibility(View.VISIBLE);
view2.setVisibility(View.GONE);
view3.setVisibility(View.GONE);
}else if(((DOT_Common_Model) getItem( int position)).getFlag()==1){
view1.setVisibility(View.GONE);
view2.setVisibility(View.VISIBLE);
view3.setVisibility(View.GONE);
}else if(((DOT_Common_Model) getItem( int position)).getFlag()==2){
view1.setVisibility(View.GONE);
view2.setVisibility(View.GONE);
view3.setVisibility(View.VISIBLE);
}else{
view1.setVisibility(View.VISIBLE);
view2.setVisibility(View.VISIBLE);
view3.setVisibility(View.VISIBLE);
}
注意：列表视图仅绑定数据，它永远不会更改每个数据值的视图查看对象，我们需要根据数据值更改视图可见性/背景。如果您使用“ if condition ”，那么“ else ”必须在那里。
答案 1 :(得分：0)
我看到你使用的适配器代码仅在条件时使用，listview不那么聪明，所以每当你只使用如果不写 else 部分然后执行一个事件那么ListView也可以改变下一个位置View，visibility或if部分中的任何内容，所以请在你的适配器代码中写下if的其他部分
我建议使用RecyclerView比ListView更先进。
答案 2 :(得分：0)
简答：
将你的onClick监听器放在if else块之外：
if(convertView==null) {
//BLABLABLA
} else {
}
// WRITE YOUR CLICK LISTENER HERE
viewHolder.mayBe.setOnClickListener(new OnClickListener() { ..... });
viewHolder.notGoing.setOnClickListener(new OnClickListener() { .. });
viewHolder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() { .... } );
为什么会出现问题
您正在做的事情称为ViewHolderPattern。它主要用于通过避免不必要的 findViewById 来提高滚动列表视图的性能。这是一个繁重的过程。
让我们看看它是如何运作的：
请看这张显示正常列表的图片：
我们的适配器有很多行，但只有3行填充了视图。当您制作适配器时，只有前3行为空并且应该充气。其他视图将使用之前创建的相同视图。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// in our example, the convert view is only null for the first 3 items
if(convertView==null) {
} else {
}
}
注意事项是：你不应该在if else阻止中设置任何内容。你应该只是在它们中找到你的视图并将它们分配给你的viewHolder并查看相关的东西（比如margin，padding，textsize，......）。您不应该在该块中执行资源或单击与侦听器相关的事物（如setText，setBitmap，Onclicklistener，...）
为什么？！ 我们之前回答过！因为它只会被填充视图的第一个项目调用！
答案 3 :(得分：-1)
您未在else案例中处理点击侦听器：
else if (convertView==null)
将所有OnClicklistener写在外面（return convertView上方）。
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