我有一个自定义ListView显示歌曲标题，每个包含两个ImageView，用于添加到收藏夹和分享歌曲。
custom_listview.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView android:id="@+id/song_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageView
android:id="@+id/add_to_favorites"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageView
android:id="@+id/share"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
activity_main：
<?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" >
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
要填写listview，我需要使用ArrayAdapter：
public class Media_adapter extends ArrayAdapter<Media> {
Context context;
int layoutResourceId;
Media data[] = null;
public Media_adapter(Context context, int layoutResourceId, Media[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MediaHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MediaHolder();
holder.song_title = (TextView)row.findViewById(R.id.song_title);
holder.add_to_favorites = (ImageView)row.findViewById(R.id.add_to_favorites);
holder.share = (ImageView)row.findViewById(R.id.share);
row.setTag(holder);
}
else
{
holder = (MediaHolder)row.getTag();
}
Media media = data[position];
holder.song_title.setText(media.title);
holder.add_to_favorites.setImageResource(media.image_favorite);
holder.share.setImageResource(media.image_share);
return row;
}
class MediaHolder
{
TextView song_title;
ImageView add_to_favorites, share;
}
}
班级媒体：
package com...;
public class Media {
public String title;
public int image_favorite, image_share;
public Media() {
super();
}
}
要播放一首歌，我已拨打setOnItemClickListener(...)
mylistview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> av,
View view, int position, long l) {
//code for playing song
}
});
最后，我想为Listview项目中使用的两个ImageView add_to_favorites和share添加onClick事件。
答案 0 :(得分：1)
您应该在适配器的构造函数中发送View.onClickListener。 然后将其分配给您有兴趣单击它们的视图 从那里只需在您的activity / fragment中实现onClickListener。
公共类Media_adapter扩展了ArrayAdapter {
Context context;
int layoutResourceId;
Media data[] = null;
View.onClickListener listener;
public Media_adapter(Context context, int layoutResourceId, Media[] data,View.onClickListener) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
this.listener = listener;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MediaHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MediaHolder();
holder.song_title = (TextView)row.findViewById(R.id.song_title);
holder.add_to_favorites = (ImageView)row.findViewById(R.id.add_to_favorites);
holder.share = (ImageView)row.findViewById(R.id.share);
**holder.share.setTag(position);
holder.share.setOnClickListener(listener);**
row.setTag(holder);
}
else
{
holder = (MediaHolder)row.getTag();
}
Media media = data[position];
holder.song_title.setText(media.title);
holder.add_to_favorites.setImageResource(media.image_favorite);
holder.share.setImageResource(media.image_share);
return row;
}
class MediaHolder
{
TextView song_title;
ImageView add_to_favorites, share;
}
}
在您的活动中，您将实现View.onClicklistener
public class MyActivity extends Activity implements View.onClickListener
{
when you create your adapter send **this** as the last parameter of the adapter constructor.
public void onClick(View view) {
switch (view.getId())
{
case R.id.share:
//here you need to retrieve the position of the item
int position = (int)view.getTag();
Media med = media[position];
//here just use med where you want to use it.
do the same thing for other componenets in your adapter layout.
break;
}
}
需要注意的一些事项：
1）我建议你使用recycleview（它有点复杂，但知道非常有用）而不是使用listview
2）我没有测试我的计算机上的代码我只是在记事本中写的，也许你会得到一些语法错误
<强>更新
我创建了一个简单的项目，它具有您正在寻找的相同功能，并且一切正常
<强> MainActivity
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private ListView mList;
private Media_adapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mList = (ListView)findViewById(R.id.listview);
Media[] data = new Media[5];
for(int i=0;i<data.length;i++)
{
data[i] = new Media();
data[i].title = "pos"+i;
data[i].image_favorite = R.mipmap.ic_launcher;
data[i].image_share = R.mipmap.ic_launcher;
}
mAdapter = new Media_adapter(this,R.layout.custom_listview,data,this);
mList.setAdapter(mAdapter);
}
@Override
public void onClick(View view) {
int position;
switch (view.getId())
{
case R.id.add_to_favorites:
position = (int) view.getTag(); Log.d("test", position + " add_to_favorites");
break;
case R.id.share:
position = (int) view.getTag(); Log.d("test", position + " share");
break;
}
}
}
<强> Media_adapter
public class Media_adapter extends ArrayAdapter<Media>
{
Context context;
int layoutResourceId;
Media data[];
View.OnClickListener listener;
public Media_adapter(Context context, int layoutResourceId, Media[] data, View.OnClickListener listener)
{
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
this.listener = listener;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View row = convertView;
MediaHolder holder;
if (row == null)
{
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MediaHolder();
holder.song_title = (TextView) row.findViewById(R.id.song_title);
holder.add_to_favorites = (ImageView) row.findViewById(R.id.add_to_favorites);
holder.share = (ImageView) row.findViewById(R.id.share);
holder.add_to_favorites.setTag(position);
holder.add_to_favorites.setOnClickListener(listener);
holder.share.setTag(position);
holder.share.setOnClickListener(listener);
row.setTag(holder);
}
else
{
holder = (MediaHolder) row.getTag();
}
Media media = data[position];
holder.song_title.setText(media.title);
holder.add_to_favorites.setImageResource(media.image_favorite);
holder.share.setImageResource(media.image_share);
return row;
}
class MediaHolder
{
TextView song_title;
ImageView add_to_favorites, share;
}
}