比ListView還要叼的recycleview
阿新 • • 發佈：2018-12-18
RecycleView
關於RecycleView的介紹網上有很多，據說是谷歌為了解決ListView的某些問題和實現更多的功能在ListView的基礎開發出來的，可以實現瀑布流和左右滑動以及上下滑動，相關方法再網上都可以找到，這裡只寫本人用到的功能，單純只是為了總結知識
使用
匯入包
implementation "com.android.support:recyclerview-v7:25.3.1"程式碼中呼叫
LinearLayoutManager layoutManager = new LinearLayoutManager(this); layoutManager.setOrientation(LinearLayoutManager.VERTICAL); //設定RecyclerView 佈局 recyclerView.setLayoutManager(layoutManager); //設定Adapter MyTopicAdapter adapter = new MyTopicAdapter(topicsBean,"F"); recyclerView.setAdapter(adapter);
其中MyTopicAdapter程式碼如下：
package adapter; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CompoundButton; import com.example.donview.campusspirit.R; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; import topics.TopicsBean; import viewholder.BaseViewHolder; /** * Created by Donview on 2018/8/16. */ public class MyTopicAdapter extends RecyclerView.Adapter<BaseViewHolder> { private static TopicsBean topicsBean; private static TopicsBean topicsEBean; public static Map<Integer, Boolean> isSelected=new HashMap<>(); public static Map<Integer, Boolean> isESelected=new HashMap<>(); protected int size=2; private int count=0; protected BaseViewHolder holder; protected String type; public MyTopicAdapter(TopicsBean topicsBean, String type){ switch (type){ case "F": this.topicsBean=topicsBean; count=topicsBean.getOptionCount(); initSelected(topicsBean.getOptionCount(),"F"); break; case "E": this.topicsEBean=topicsBean; count=topicsEBean.getOptionCount(); map=new HashMap<>(); initSelected(topicsBean.getOptionCount(),"E"); break; } this.type=type; } //建立時自動呼叫 @Override public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { switch (type){ case "F": inflaterFView(parent); break; case "E": inflaterEView(parent); break; } return holder; } //關聯ViewHolder @Override public void onBindViewHolder(BaseViewHolder viewHolder, int position) { //設定選項內容 switch (type){ case "F": bindFView(viewHolder,position); break; case "E": bindEView(viewHolder,position); break; } } //解析F題型的佈局檔案 private void inflaterFView(ViewGroup parent) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_type2_option,parent,false); holder = new BaseViewHolder(view,"F"); } //賦值F題型 private void bindFView(BaseViewHolder viewHolder, int position) { if (position<topicsBean.getOptionCount()){ viewHolder.cb_optionA.setVisibility(View.VISIBLE); viewHolder.tv_content1.setVisibility(View.VISIBLE); viewHolder.cb_optionA.setText(topicsBean.getOptionList().get(position)); viewHolder.tv_content1.setText(topicsBean.getAnswerList().get(position)); }else { viewHolder.cb_optionA.setVisibility(View.GONE); viewHolder.tv_content1.setVisibility(View.GONE); } initOption(position,viewHolder); } //解析E題型的佈局檔案 private void inflaterEView(ViewGroup parent) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_type3_option,parent,false); holder = new BaseViewHolder(view,"E"); } //賦值E題型 private void bindEView(BaseViewHolder viewHolder, int position) { if (position<topicsEBean.getOptionCount()){ viewHolder.cb_optionA.setVisibility(View.VISIBLE); viewHolder.tv_content1.setVisibility(View.VISIBLE); viewHolder.cb_optionA.setOnCheckedChangeListener(new MyOnCheckedListener(position)); viewHolder.tv_content1.setText(topicsEBean.getAnswerList().get(position)); }else { viewHolder.cb_optionA.setVisibility(View.GONE); viewHolder.tv_content1.setVisibility(View.GONE); } initOption(position,viewHolder); } @Override public int getItemCount() { return count; } //設定選擇題ListView中CheckBox的文字與選中狀態 protected void initOption(final int position, final BaseViewHolder viewHolder) { final int type = this.type=="F"?topicsBean.getType():topicsEBean.getType(); final Map<Integer, Boolean> select=this.type=="F"?isSelected:isESelected; if ( position < size) { viewHolder.cb_optionA.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (select.get(position) == false) { select.put(position, true); //type==1?單選:不定項 if (type==1){ unSelect(position); notifyDataSetChanged(); } } else { select.put(position, false); } } }); viewHolder.cb_optionA.setChecked(select.get(position)); } } //初始化checkbox的選中狀態 public void initSelected(int size,String typeName) { this.size=size; Map<Integer, Boolean> selected=typeName=="F"?isSelected:isESelected; for (int i = 0; i < size; i++) { selected.put(i, false); if (typeName=="E") map.put(i," "); } } //取消當前選項以外所有選項選中 private void unSelect(int position) { for (int i=0;i<size;i++){ if (i!=position){ if (type=="F") isSelected.put(i, false); else isESelected.put(i,false); } } } //1.檢視F題型是否有選中選項 public static boolean hasCheck() { for (int i=0;i<isSelected.size();i++){ if (isSelected.get(i)==true) return true; } return false; } //檢視E題型是否全選 public static boolean hasEChecked() { for (int i=0;i<map.size();i++){ if (!map.get(i).equalsIgnoreCase("√")&&!map.get(i).equalsIgnoreCase("╳")){ Log.i("MyCommitTopic","CommitTopic:map.get（i)="+map.get(i)); return false; } } return true; } //2.返回F題型選中選項 public static String getCheck() { String result=""; for (int i=0;i<isSelected.size();i++){ if (isSelected.get(i)==true){ result+=topicsBean.getOptionList().get(i)+","; } } result=result.substring(0,result.length()-1); return result; } //返回E題型選中選項 public static String getCheckE() { String result=""; for (int i=0;i<map.size();i++){ if (map.get(i).equalsIgnoreCase("√")){ result+=topicsBean.getOptionList().get(i)+","; } } if (result.length()>=1) result=result.substring(0,result.length()-1); return result; } private static Map<Integer,String> map; //E題型的選中事件 private class MyOnCheckedListener implements CompoundButton.OnCheckedChangeListener { int position=0; public MyOnCheckedListener(int position) { this.position=position; } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { buttonView.setText(isChecked?"√":"╳"); map.put(position,isChecked?"√":"╳"); } } }
自身就可以封裝自定義的ViewHolder比ListView方便很多而且簡潔得多：
package viewholder; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.CheckBox; import android.widget.LinearLayout; import android.widget.TextView; import com.example.donview.campusspirit.R; /** * Created by Donview on 2018/8/17. */ public class BaseViewHolder extends RecyclerView.ViewHolder{ public TextView tv_className; public TextView tv_teacherName; public TextView tv_topicName; public TextView tv_date; public TextView tv_time; public LinearLayout ll_work_content; public CheckBox cb_optionA; public TextView tv_content1; public BaseViewHolder(View itemView, String type) { super(itemView); switch (type){ case "F": findViewFromF(itemView); break; case "E": findViewFromE(itemView); break; case "Work": findViewFromWork(itemView); break; } } //F題型配置 private void findViewFromF(View itemView) { cb_optionA= (CheckBox) itemView.findViewById(R.id.cbf_optionA); tv_content1=(TextView)itemView.findViewById(R.id.tvf_content1); } //E題型配置 private void findViewFromE(View itemView) { cb_optionA= (CheckBox) itemView.findViewById(R.id.cbe_optionA); tv_content1=(TextView)itemView.findViewById(R.id.tve_content1); } //WorkPage配置 private void findViewFromWork(View itemView) { ll_work_content=(LinearLayout)itemView.findViewById(R.id.ll_work_content); tv_className= (TextView) itemView.findViewById(R.id.tv_work_className); tv_teacherName= (TextView) itemView.findViewById(R.id.tv_work_teacherName); tv_topicName= (TextView) itemView.findViewById(R.id.tv_work_topicName); tv_date= (TextView) itemView.findViewById(R.id.tv_work_date); tv_time= (TextView) itemView.findViewById(R.id.tv_work_time); } }
RecycleView本身不實現點選事件，需要自己實現，方法多種，這裡給出在Adapter裡面實現介面的方法
package adapter;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.donview.campusspirit.R;
import java.util.ArrayList;
import java.util.Map;
import viewholder.BaseViewHolder;
/**
* Created by Donview on 2018/8/21.
*/
public class MyWorkAdapter extends RecyclerView.Adapter<BaseViewHolder> implements View.OnClickListener{
private ArrayList<Map> arrayList;
protected BaseViewHolder holder;
public MyWorkAdapter(ArrayList<Map> arrayList){
this.arrayList=arrayList;
}
@Override
public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_work_pager,parent,false);
view.setOnClickListener(this);
holder = new BaseViewHolder(view,"Work");
return holder;
}
@Override
public void onBindViewHolder(BaseViewHolder viewHolder, int position) {
if (position>arrayList.size()) return;
viewHolder.tv_className.setText(arrayList.get(position).get("class_name").toString());
viewHolder.tv_teacherName.setText(arrayList.get(position).get("realName").toString());
viewHolder.tv_topicName.setText(arrayList.get(position).get("task_name").toString());
viewHolder.tv_date.setText(arrayList.get(position).get("date").toString());
viewHolder.tv_time.setText(arrayList.get(position).get("time").toString());
viewHolder.itemView.setTag(position);
int color=arrayList.get(position).get("all_done").toString().equalsIgnoreCase("1")?
android.graphics.Color.parseColor("#AAAAAA")
:android.graphics.Color.parseColor("#ff33b5e5");
Log.i("UserAccount","Work:position"+position+",all_done="+arrayList.get(position).get("all_done").toString());
viewHolder.ll_work_content.setBackgroundColor(color);
}
@Override
public int getItemCount() {
return arrayList.size();
}
private OnItemClickListener mOnItemClickListener = null;
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
//注意這裡使用getTag方法獲取position
mOnItemClickListener.onItemClick(v,(int)v.getTag());
}
}
public static interface OnItemClickListener {
void onItemClick(View view , int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
this.mOnItemClickListener = listener;
}
}
然後程式碼中呼叫：
//RecycleView選項監聽
private class MyWorkOnItemClickListener implements MyWorkAdapter.OnItemClickListener {
@Override
public void onItemClick(View view, int position) {
if (position>arrayList.size()){
Log.i("FoolException","IndexOutOfBoundsException!WorkPage陣列下標超出了");
return;
}
MyApplication.setTask_id((int)arrayList.get(position).get("task_id"));
Log.i("TestViewHolder","Click:task_id="+ MyApplication.getTask_id()+
",userId="+ MyApplication.getUserId()+",userName="+
MyApplication.getUserName()+",task_name="+arrayList.get(position).get("task_name")+",all_done="+
arrayList.get(position).get("all_done"));
context.startActivity(new Intent(context, TopicListActivity.class));
}
}