android 时间轴 listview,android 时间轴listview的UI界面实现
时间: 2023-06-19 22:04:06 浏览: 53
实现一个时间轴的ListView,需要自定义ListView的Item布局,具体实现步骤如下:
1. 自定义ListView的item布局,可以使用LinearLayout实现垂直方向的布局,其中包含两个TextView,一个用于显示时间,一个用于显示内容。
2. 在Adapter中使用ViewHolder模式优化ListView的性能。
3. 在ListView的Adapter中实现getView方法,将数据绑定到item的TextView中。
4. 在ListView的Activity中设置Adapter,将数据传入Adapter中,实现时间轴ListView的界面效果。
下面是一个简单的示例代码:
1. item_time_line.xml
```
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="8dp"
android:paddingBottom="8dp"
android:paddingStart="16dp"
android:paddingEnd="16dp">
<TextView
android:id="@+id/tv_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:textColor="@color/colorAccent"/>
<TextView
android:id="@+id/tv_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:textSize="16sp"
android:textColor="@color/colorPrimaryDark"/>
</LinearLayout>
```
2. TimeLineAdapter.java
```
public class TimeLineAdapter extends BaseAdapter {
private List<TimeLineItem> mData;
private LayoutInflater mInflater;
public TimeLineAdapter(Context context, List<TimeLineItem> data) {
mData = data;
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_time_line, parent, false);
holder = new ViewHolder();
holder.tvTime = convertView.findViewById(R.id.tv_time);
holder.tvContent = convertView.findViewById(R.id.tv_content);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
TimeLineItem item = mData.get(position);
holder.tvTime.setText(item.getTime());
holder.tvContent.setText(item.getContent());
return convertView;
}
private static class ViewHolder {
TextView tvTime;
TextView tvContent;
}
}
```
3. TimeLineActivity.java
```
public class TimeLineActivity extends AppCompatActivity {
private ListView mListView;
private List<TimeLineItem> mData;
private TimeLineAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_time_line);
mListView = findViewById(R.id.list_view);
mData = new ArrayList<>();
mData.add(new TimeLineItem("2021-01-01", "事件1"));
mData.add(new TimeLineItem("2021-02-02", "事件2"));
mData.add(new TimeLineItem("2021-03-03", "事件3"));
mData.add(new TimeLineItem("2021-04-04", "事件4"));
mData.add(new TimeLineItem("2021-05-05", "事件5"));
mData.add(new TimeLineItem("2021-06-06", "事件6"));
mData.add(new TimeLineItem("2021-07-07", "事件7"));
mData.add(new TimeLineItem("2021-08-08", "事件8"));
mData.add(new TimeLineItem("2021-09-09", "事件9"));
mAdapter = new TimeLineAdapter(this, mData);
mListView.setAdapter(mAdapter);
}
}
```
上述代码实现了一个简单的时间轴ListView,界面如下所示:
![时间轴ListView界面](https://img-blog.csdn.net/20180522185822288?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYmxvZ3Nwb3J0Zm9ybS9ib29rcy5wbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/q/75)