在android中的每个recycler视图单元格中添加Progressbar
我是android新手,我正在制作一个铃声下载程序。在这个应用程序中,我有一个带有铃声列表的回收器视图。当用户点击下载按钮时,我想在每个单元格中显示一个进度条。我知道RecyclerView会回收任何旧视图,因此希望至少在progressbars中找到一种方法 实现这一目标的理想方式是什么 我的适配器类在android中的每个recycler视图单元格中添加Progressbar,android,listview,android-recyclerview,download,android-progressbar,Android,Listview,Android Recyclerview,Download,Android Progressbar,我是android新手,我正在制作一个铃声下载程序。在这个应用程序中,我有一个带有铃声列表的回收器视图。当用户点击下载按钮时,我想在每个单元格中显示一个进度条。我知道RecyclerView会回收任何旧视图,因此希望至少在progressbars中找到一种方法 实现这一目标的理想方式是什么 我的适配器类 public class TrackListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{ /
public class TrackListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
//to reference the Activity
private final Activity context;
private final RecyclerViewClicks recyclerViewClicks;
private final ArrayList<Track> trackList;
public TrackListAdapter(Activity context, ArrayList<Track> trackList, RecyclerViewClicks recyclerViewClicks){
this.context = context;
this.recyclerViewClicks = recyclerViewClicks;
this.trackList = trackList;
}
public ArrayList<Track> getData() {
return this.trackList;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.tracklist_row,null);
TrackListView rowView = new TrackListView(view);
return rowView;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
Track currentTrack = this.trackList.get(position);
TrackListView trackListView = (TrackListView) holder;
trackListView.title.setText(currentTrack.getName());
trackListView.track.setText(currentTrack.getArtist());
Picasso.get().load(currentTrack.getArtUrl())
.resize(100,100)
.into(trackListView.imageView);
// if(currentTrack.isDownloaded())
// {
// trackListView.download.setVisibility(View.INVISIBLE);
// }
// else
// {
// trackListView.download.setVisibility(View.INVISIBLE);
// }
}
@Override
public int getItemCount() {
return trackList.size();
}
class TrackListView extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener
{
TextView title, track;
ImageView imageView;
Button download;
ProgressBar progressBar;
TextView progressText;
// DownloadProgress downloadProgress;
public ProgressBar getProgressBar() {
return progressBar;
}
public TrackListView(View itemView) {
super(itemView);
title = itemView.findViewById(R.id.name);
track = itemView.findViewById(R.id.track);
imageView = itemView.findViewById(R.id.imageView);
download = itemView.findViewById(R.id.download);
progressBar = itemView.findViewById(R.id.progressBar);
progressText = itemView.findViewById(R.id.downloadProgress);
itemView.setOnClickListener(this);
download.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
recyclerViewClicks.onButtonClicked(getAdapterPosition(),view,(Button) view);
}
});
}
@Override
public void onClick(View view) {
}
@Override
public boolean onLongClick(View view) {
return false;
}
}
}
公共类TrackListAdapter扩展了RecyclerView.Adapter{
//参考活动
私人最终活动背景;
私人最终回收服务点击回收服务点击;
私有最终ArrayList跟踪列表;
公共TrackListAdapter(活动上下文、ArrayList轨迹列表、RecycleServiceClicks RecycleServiceClicks){
this.context=上下文;
this.recyclerViewClicks=recyclerViewClicks;
this.trackList=trackList;
}
公共ArrayList getData(){
返回此.trackList;
}
@凌驾
public RecyclerView.ViewHolder onCreateViewHolder(视图组父级,int-viewType){
LayoutFlater充气机=LayoutFlater.from(上下文);
视图=充气机。充气(右布局。轨迹列表行,空);
TrackListView行视图=新的TrackListView(视图);
返回行视图;
}
@凌驾
BindViewHolder上的公共无效(RecyclerView.ViewHolder,int位置){
Track currentTrack=this.trackList.get(位置);
TrackListView TrackListView=(TrackListView)支架;
trackListView.title.setText(currentTrack.getName());
trackListView.track.setText(currentTrack.getArtister());
Picasso.get().load(currentTrack.getArtUrl())
.调整大小(100100)
.into(trackListView.imageView);
//if(currentTrack.isDownloaded())
// {
//trackListView.download.setVisibility(View.INVISIBLE);
// }
//否则
// {
//trackListView.download.setVisibility(View.INVISIBLE);
// }
}
@凌驾
public int getItemCount(){
返回trackList.size();
}
类TrackListView扩展了RecyclerView.ViewHolder实现了View.OnClickListener、View.OnLongClickListener
{
文本视图标题、曲目;
图像视图图像视图;
按钮下载;
ProgressBar ProgressBar;
文本查看进度文本;
//下载进度下载进度;
公共ProgressBar getProgressBar(){
返回进度条;
}
公共轨迹列表视图(视图项视图){
超级(项目视图);
title=itemView.findviewbyd(R.id.name);
track=itemView.findviewbyd(R.id.track);
imageView=itemView.findViewById(R.id.imageView);
download=itemView.findviewbyd(R.id.download);
progressBar=itemView.findViewById(R.id.progressBar);
progressText=itemView.findViewById(R.id.downloadProgress);
setOnClickListener(这个);
下载.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
RecycleServiceClicks.onButtonClicked(getAdapterPosition(),视图,(按钮)视图);
}
});
}
@凌驾
公共void onClick(视图){
}
@凌驾
仅长按公共布尔值(视图){
返回false;
}
}
}
主要活动
public class MainActivity extends AppCompatActivity {
ArrayList<Track> tracks = new ArrayList<Track>();
RecyclerView trackListView;
TrackListAdapter trackListAdapter;
private File direct;
final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
AndroidNetworking.initialize(getApplicationContext());
trackListAdapter = new TrackListAdapter(this, tracks, new RecyclerViewClicks() {
@Override
public void onItemSelected(int position, View v) {
}
@Override
public void onButtonClicked(int position, View cell, Button button) {
Track selectedTrack = tracks.get(position);
downloadMusic(selectedTrack,cell);
}
@Override
public void onLongClicked(int position) {
}
});
//
trackListView = (RecyclerView) findViewById(R.id.trackListView);
trackListView.setLayoutManager(new LinearLayoutManager(this));
trackListView.setAdapter(trackListAdapter);
......
......
public类MainActivity扩展了AppCompatActivity{
ArrayList轨迹=新建ArrayList();
RecyclerView轨迹列表视图;
TrackListAdapter TrackListAdapter;
私人文件直接;
最终私有int请求\代码\请求\权限=123;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar Toolbar=(Toolbar)findViewById(R.id.Toolbar);
设置支持操作栏(工具栏);
初始化(getApplicationContext());
trackListAdapter=新trackListAdapter{
@凌驾
已选择公共视图(内部位置,视图v){
}
@凌驾
公共无效onButtonClicked(内部位置、视图单元格、按钮){
Track selectedTrack=tracks.get(位置);
下载音乐(所选曲目、手机);
}
@凌驾
仅长时间单击公共无效(内部位置){
}
});
//
trackListView=(RecyclerView)findViewById(R.id.trackListView);
setLayoutManager(新的LinearLayoutManager(this));
setAdapter(trackListAdapter);
......
......
我正在使用AndroidNetworking libs从服务器下载数据。
请帮助以下是我为RecyclerView构建的内容,其中单元格包含一个内容布局,单击该布局可加载audiocast mp3。第一种方法是最佳的,因为它将加载信息临时存储在内存中,而第二种方法更适合于存储需要包含的信息,用于l长时间段,而不是UI数据 内存中的加载状态(最佳解决方案) 当选择RecyclerView中的内容时,ViewModel存储唯一项目id的数组或哈希映射。当RecyclerView单元格的内容已加载时,它会将数组或哈希映射中内容id的视图状态更改为已加载。布局将绑定到相应显示进度条的ViewModel 磁盘上的加载状态
内容模型包含一个属性,以便在文件室SQLite数据库中更新加载状态。布局已经是绑定到内容模型的数据,并将根据模型的属性显示加载栏。以下是我为RecyclerView构建的内容,其中单元格包含内容布局