Timeline of android project planing, android Project

Timeline of android project planing, android Project

The timeline is used in recently developed apps. The following effects must be achieved:

You can use listview to implement this. Then I wrote it in the simulation recently:

First, write the layout of the items in listview:

Listview_item.xml

<? 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: background = "# ffffff" android: orientation = "vertical" android: paddingRight = "20dp"> <View android: id = "@ + id/view_0" android: layout_width = "1dp" android: layout_height = "25dp" android: layout_below = "@ + id/layout_1" android: layout_marginLeft = "71dp" android: background = "# A6A6A6"/> <View android: id = "@ + id/view_1" android: layout_width = "1dp" android: layout_height = "25dp" android: layout_below = "@ + id/layout_2" android: layout_marginLeft = "71dp" android: background = "# A6A6A6"/> <TextView android: id = "@ + id/show_time" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_below = "@ + id/view_1" android: layout_marginLeft = "30dp" android: text = "Test Data" android: textSize = "12dp"/> <ImageView android: id = "@ + id/image" android: layout_width = "15dp" android: layout_height = "15dp" android: layout_below = "@ + id/view_1" android: layout_marginLeft = "65dp" android: src = "@ drawable/timeline_green"/> <View android: id = "@ + id/view_2" android: layout_width = "1dp" android: layout_height = "100dp" android: layout_below = "@ + id/image" android: layout_marginLeft = "71dp" android: background = "# A6A6A6"/> <RelativeLayout android: id = "@ + id/relative" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: layout_below = "@ + id/image" android: layout_marginTop = "-20dp" android: layout_toRightOf = "@ + id/image" android: background = "@ drawable/timeline_content" android: padding = "10dp"> <ImageView android: id = "@ + id/image_1" android: layout_width = "60dp" android: layout_height = "60dp" android: layout_alignParentLeft = "true" android: layout_centerVertical = "true" android: layout_marginLeft = "5dp" android: src = "@ drawable/bg_green_circle_smic"/> <TextView android: id = "@ + id/title" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_centerHorizontal = "true" android: layout_centerVertical = "true" android: ellipsize = "end" android: maxEms = "7" android: paddingLeft = "5dp" android: singleLine = "true" android: text = "Test Data" android: textSize = "12sp"/> </RelativeLayout>

The next step is to write the listview adapter:

TimelineAdapter. java

package com.example.timelinetext.test;import java.util.List;import java.util.Map;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class TimelineAdapter extends BaseAdapter {private Context context;private List<Map<String, Object>> list;private LayoutInflater inflater;public TimelineAdapter(Context context, List<Map<String, Object>> list) {super();this.context = context;this.list = list;}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int position) {return position;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder viewHolder = null;if (convertView == null) {inflater = LayoutInflater.from(parent.getContext());convertView = inflater.inflate(R.layout.listview_item, null);viewHolder = new ViewHolder();viewHolder.title = (TextView) convertView.findViewById(R.id.title);convertView.setTag(viewHolder);} else {viewHolder = (ViewHolder) convertView.getTag();}String titleStr = list.get(position).get("title").toString();viewHolder.title.setText(titleStr);return convertView;}static class ViewHolder {public TextView year;public TextView month;public TextView title;}}

Last use:

MainActivity. java

Package com. example. timelinetext. test; import java. util. arrayList; import java. util. hashMap; import java. util. list; import java. util. map; import android. app. activity; import android. OS. bundle; import android. widget. listView; public class MainActivity extends Activity {private ListView listView; List <String> data; private TimelineAdapter timelineAdapter; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_listview); listView = (ListView) this. findViewById (R. id. listview); listView. setDividerHeight (0); timelineAdapter = new TimelineAdapter (this, getData (); listView. setAdapter (timelineAdapter);} private List <Map <String, Object> getData () {List <Map <String, Object> list = new ArrayList <Map <String, object >>> (); Map <String, Object> map = new HashMap <String, Object> (); map. put ("title", "this is 1st rows of test data"); list. add (map); map = new HashMap <String, Object> (); map. put ("title", "this is 2nd rows of test data"); list. add (map); map = new HashMap <String, Object> (); map. put ("title", "this is 3rd rows of test data"); list. add (map); map = new HashMap <String, Object> (); map. put ("title", "this is 4th rows of test data"); list. add (map); return list ;}}

Running Effect

Therefore, it is not complicated to simulate writing a timeline. Do not be scared by the image designed by ui. in fact, it is just a normal listview.

Source code download

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