android recyclerView嵌套progressbar _RecyclerView

古人已用三冬足，年少今开万卷余。这篇文章主要讲述android recyclerView嵌套progressbar相关的知识，希望能为你提供帮助。
刚刚实现了GridView的实现方式，领导发话，最好用recyclerView更好，又用了一下午的时间把recyclerView研究了下，具体代码如下：

FragmentTwo.java

package com.example.navigation;

import android.content.Context;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.navigation.Navigation;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.SystemClock;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ProgressBar;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;

public class FragmentTwo extends Fragment {
private View mRootView;
private RecyclerView recyclerView;
private PlayListAdapter adapter;
private List< Playlist_Info> list = new ArrayList< > ();
private String Tag = "FragmentTwo";

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mRootView = inflater.inflate(R.layout.fragment_two, container, false);
recyclerView = mRootView.findViewById(R.id.recycler_view);
GridLayoutManager layoutManager = new GridLayoutManager(getContext(),4,GridLayoutManager.VERTICAL,false);
recyclerView.addItemDecoration(new SpacesItemDecoration(new Rect(40,0,0,64)));
recyclerView.setLayoutManager(layoutManager);
initlist();
adapter = new PlayListAdapter(getContext(),list);
recyclerView.setAdapter(adapter);
progress_bar(1);
return mRootView;
}

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button fragment_one_back= view.findViewById(R.id.btn_go_back_fragment_one);
fragment_one_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Navigation.findNavController(view).navigate(R.id.action_fragmentTwo_to_fragmentOne);
}
});

Button btn_activity2 = view.findViewById(R.id.btn_go_activity2);
btn_activity2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Navigation.findNavController(view).navigate(R.id.action_fragmentTwo_to_main2Activity);
}
});
}
@Override
public void onDestroy() {
super.onDestroy();
}

public void initlist()
{
for(int i = 1; i < 21; i++)
{
if(2 == i)
{
list.add(new Playlist_Info("大江东区浪淘尽，千古风流人物","3:22",30));
continue;
}
else
{
list.add(new Playlist_Info("精绝古城第"+String.valueOf(i)+"集","3:22",30));
}
}
}
private void progress_bar(final int positionInAdapter) {
list.get(positionInAdapter).setIsPlaying(true);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if(layoutManager instanceof GridLayoutManager)
{
GridLayoutManager gridmanager = (GridLayoutManager) layoutManager;
int first_position = gridmanager.findFirstVisibleItemPosition();
int last_position = gridmanager.findLastVisibleItemPosition();
if(positionInAdapter > = gridmanager.findFirstVisibleItemPosition() & &
positionInAdapter < = gridmanager.findLastVisibleItemPosition())
{
int positionInListView = positionInAdapter - gridmanager.findFirstVisibleItemPosition();
ProgressBar item_listening = (ProgressBar) recyclerView.getChildAt(positionInListView)
.findViewById(R.id.pb_listening_progressbar);
item_listening.setVisibility(View.VISIBLE);
}
Log.d(Tag,first_position + ""+ last_position);
}
new Thread(new Runnable() {
@Override
public void run() {
for (int i = 1; i < 101; i++) {
final int progress = i;
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
publishProgress(positionInAdapter, progress);
}
});
SystemClock.sleep(5000);
}
}
}).start();
}

public void publishProgress(final int positionInAdapter, final int progress_time) {
list.get(positionInAdapter).set_item_progress(progress_time);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if(layoutManager instanceof GridLayoutManager)
{
GridLayoutManager gridmanager = (GridLayoutManager) layoutManager;
if(positionInAdapter > = gridmanager.findFirstVisibleItemPosition() & &
positionInAdapter < = gridmanager.findLastVisibleItemPosition())
{
int positionInListView = positionInAdapter - gridmanager.findFirstVisibleItemPosition();
ProgressBar item = (ProgressBar) recyclerView.getChildAt(positionInListView)
.findViewById(R.id.pb_listening_progressbar);
item.setProgress(progress_time);
}
}
}
}

PlayListAdapter.java

package com.example.navigation; import android.content.Context; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ProgressBar; import android.widget.RelativeLayout; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; import java.util.List; public class PlayListAdapter extends RecyclerView.Adapter< PlayListAdapter.PlayListHoler> { private String log_tag = "GridViewAdapter"; private Context context; private List< Playlist_Info> listitem; static class PlayListHoler extends RecyclerView.ViewHolder{ TextView textview; TextView textview_time; AudioColumnView audioColumnView; ProgressBar pb_progressbar; ProgressBar pb_listening_progressbar; public PlayListHoler(View view) { super(view); pb_progressbar = view.findViewById(R.id.pb_progressbar); pb_listening_progressbar=view.findViewById(R.id.pb_listening_progressbar); textview = (TextView)view.findViewById(R.id.textView); textview_time = (TextView)view.findViewById(R.id.textView_time); audioColumnView = (AudioColumnView)view.findViewById(R.id.acv); } } public PlayListAdapter(Context context,List< Playlist_Info> listitem){ this.context = context; this.listitem = listitem; }@NonNull @Override public PlayListHoler onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(context).inflate(R.layout.playlist_item,parent,false); return new PlayListHoler(view); }@Override public void onBindViewHolder(@NonNull PlayListHoler holder, int position) { Playlist_Info info = listitem.get(position); if(info != null) { int text_left_margin = 0; if(position == 0) { text_left_margin = 19; holder.pb_progressbar.setProgress(38); holder.pb_listening_progressbar.setVisibility(View.GONE); holder.audioColumnView.setVisibility(View.GONE); holder.textview_time.setText("已听38%"); } else if(position == 1) { text_left_margin = 67; holder.pb_listening_progressbar.setProgress(listitem.get(position).get_item_progress()); holder.pb_progressbar.setVisibility(View.GONE); holder.pb_listening_progressbar.setVisibility(View.VISIBLE); holder.audioColumnView.setVisibility(View.VISIBLE); holder.textview_time.setText("已听38%"); } else { text_left_margin = 26; holder.pb_progressbar.setProgress(0); holder.pb_progressbar.setVisibility(View.VISIBLE); holder.pb_listening_progressbar.setVisibility(View.GONE); holder.audioColumnView.setVisibility(View.GONE); holder.textview_time.setText( info.get_item_time()); } Log.d(log_tag, String.valueOf(info.get_item_name().length())); //改变字体位置 ViewGroup.MarginLayoutParams marginLayoutParams_text = new ViewGroup.MarginLayoutParams(holder.textview.getLayoutParams()); marginLayoutParams_text.setMargins(text_left_margin,19,0,0); RelativeLayout.LayoutParams layoutParams_text = new RelativeLayout.LayoutParams(marginLayoutParams_text); holder.textview.setLayoutParams(layoutParams_text); holder.textview.setText( sub_string(info.get_item_name())); } }@Override public int getItemCount() { return listitem.size(); }String sub_string(String source_string) { String sub_string = ""; if(source_string.length()< 8) { sub_string = source_string; } else { sub_string=source_string.substring(0, 4)+"..."+source_string.substring(source_string.length() - 4); } return sub_string; } }

SpacesItemDecoration.java

package com.example.navigation; import android.graphics.Rect; import android.view.View; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; public class SpacesItemDecoration extends RecyclerView.ItemDecoration { private int left; private int right; private int top; private int bottom; public SpacesItemDecoration(Rect rect) { this.left = rect.left; this.right = rect.right; this.top = rect.top; this.bottom = rect.bottom; }@Override public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) { outRect.left = this.left; outRect.bottom = this.bottom; //由于每行都只有5个，所以第一个都是3的倍数，把左边距设为0 if (parent.getChildLayoutPosition(view) %4==0) { outRect.left = 0; }} }

xml

< androidx.recyclerview.widget.RecyclerView android:id="@+id/recycler_view" android:layout_marginTop="174px" android:layout_alignParentRight="true" android:layout_width="1660px" android:layout_marginRight="100px" android:layout_height="match_parent" />