如何刷新循环视图的上一项行视图的视图
saj*_*eer 5 java android view android-mediaplayer android-recyclerview
大家好,希望你们都好.我正在开发一个Android应用程序,它将播放不同的动物声音.
我正在使用回收视图,如下面的屏幕截图所示.现在我遇到了一个问题,我的行内有一个播放按钮,每当我从我的项目0播放声音时播放动物的声音,或者任何位置显示我在视图中暂停选项.但每当我点击下一个项目1或任何其他项目时,它都不会更改上一个项目0的图像.
我是通过使用以下代码刷新我的适配器列表来实现的.但我认为这不是一个好习惯.
t1.recyclerView.setAdapter(null);
t1.customAdapter=new CustomAdapter(t1.animalList,ctx);
t1.recyclerView.setAdapter(t1.customAdapter);
我尝试过使用各种各样的东西,notifyItemChanged(oldPosition)但仍然没有得到我想要的结果.
请建议我一个合适的方法来解决这个问题？我是android的新手,我有一个想法,以获取最后一项的视图并保存它然后我得到该视图并在我之前的列表按钮上设置默认图像播放,但我不知道如何做到这一点？
这是我的自定义适配器代码.!
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {
private List<Animal> AnimalList;
public Context ctx;
public static int postionchange=-1;
public static Tab1Birds t1;
final int[] countLike = {0};
//public static MediaPlayer mediaPlayer2 = new MediaPlayer();
int pos=0;
public class MyViewHolder extends RecyclerView.ViewHolder {
public ImageView display;
public TextView nameTextView;
public ImageButton play,options,menubtn;
public MyViewHolder(View view) {
super(view);
nameTextView = (TextView) view.findViewById(R.id.nameTextView);
play=(ImageButton)view.findViewById(R.id.playbtn);
options=(ImageButton)view.findViewById(R.id.menubtn);
display=(ImageView)view.findViewById(R.id.imageview);
menubtn = (ImageButton) view.findViewById(R.id.menubtn);
//MediaPlayerClass.mediaPlayer= new MediaPlayer();
}
}
public CustomAdapter(List<Animal> moviesList,Context ct) {
this.AnimalList = moviesList;
this.ctx=ct;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row_list, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
final Animal animal = AnimalList.get(position);
final int[] previous = {position};
holder.nameTextView.setText(animal.getName());
holder.display.setImageResource(animal.getImageResource());
//////////////////////////////////////////////////////////////////////////////////////////////////////////
holder.options.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
if (MediaPlayerClass.mediaPlayer.isPlaying()) {
holder.play.setBackgroundResource(R.drawable.play_btn);
MediaPlayerClass.mediaPlayer.stop();
}
} catch (Exception ex) {
}
Dialog dialog;
final String[] items = {"SET AS RING TUNE", "SET AS MESSAGE TUNE", "SET AS ALARM TUNE"};
final ArrayList itemsSelected = new ArrayList();
final AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
builder.setTitle("OPTIONS");
builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int selectedItemId,
boolean isSelected) {
if (isSelected) {
itemsSelected.add(selectedItemId);
} else if (itemsSelected.contains(selectedItemId)) {
itemsSelected.remove(Integer.valueOf(selectedItemId));
}
}
})
.setPositiveButton("Done!", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
Toast toast = Toast.makeText(ctx, "successfully selected", Toast.LENGTH_SHORT);
toast.show();
SparseBooleanArray CheCked = ((AlertDialog) dialog).getListView().getCheckedItemPositions();
String str = "";
if (CheCked.get(0)) {
savering(animal.getSoundResource());
}
if (CheCked.get(1)) {
savemsg(animal.getSoundResource());
}
if (CheCked.get(2)) {
savealarm(animal.getSoundResource());
}
// if (CheCked.get(3)) {
// DatabaseHelper.save_bookmarks(itemsList.get(position).getitemName(), R.drawable.play_btn, itemsList.get(position).getItemTuneSt());
// Toast.makeText(ctx, "Item added to favourites", Toast.LENGTH_SHORT).show();
// }
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
});
dialog = builder.create();
dialog.show();
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}
});
pos=position;
// for animation
// ///////////////////////////
//animate(holder);//Function for animation
//////////////////////////////
holder.play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(postionchange==-1)
{
postionchange=position;
}
if(postionchange!=position)
{
holder.play.setBackgroundResource(R.drawable.play_btn);
}
holder.play.setBackgroundResource(R.drawable.pause_btn);// present state
MediaPlayerClass.play(animal.getSoundResource(),ctx);
if(countLike[0] ==0)
{
countLike[0] =1;
}else if(countLike[0] ==1)
{
//if is playing then Pause
if(MediaPlayerClass.mediaPlayer.isPlaying())
MediaPlayerClass.mediaPlayer.stop();
t1.recyclerView.setAdapter(null);
t1.customAdapter=new CustomAdapter(t1.animalList,ctx);
t1.recyclerView.setAdapter(t1.customAdapter);
holder.play.setBackgroundResource(R.drawable.play_btn); //sound stop show play button
countLike[0] =2;
}
if(countLike[0] >1)
{
countLike[0] =0;
holder.play.setBackgroundResource(R.drawable.play_btn); // click to play music, click again to stop music
}
//setOnCompletionListener
MediaPlayerClass.mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
holder.play.setBackgroundResource(R.drawable.play_btn);
}
});
// MediaPlayerClass.mediaPlayer.start();
}
});
}
@Override
public int getItemCount() {
return AnimalList.size();
}
//animation
public void animate(RecyclerView.ViewHolder viewHolder) {
final Animation animAnticipateOvershoot = AnimationUtils.loadAnimation(ctx, R.anim.bounce_interpolator);
viewHolder.itemView.setAnimation(animAnticipateOvershoot);
}
//////////////////////////////////////////////////////////////////////////////////////////
}
以下是三星手机中的音乐播放器示例.当我播放音乐时,它会显示动画,当我播放下一首歌时,它会播放该歌曲并停止之前播放的音乐及其动画.我知道如何停止媒体播放器,但如何更改停止该动画或音乐库等？
下面的示例适用于 RecyclerView 的普通列表数据。
- 首先我们需要保存点击的位置，然后我们必须应用notifyDataSetChanged()。
之后，当刷新列表时，检查您保存的位置与实际绑定位置，然后应用您需要的更改。
public void onBindViewHolder（最终MyViewHolder持有者，最终int位置）{
Run Code Online (Sandbox Code Playgroud)holder.tvGroupName.setText(list.get(position).getGroupName()); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Save position in item click then refresh list pos = position; notifyDataSetChanged(); } }); // Once all items started refreshing check your save position with actual position then change text if (pos == position) { holder.tvGroupName.setText("Testing"); } }
希望这个示例有帮助..
和，
我还修改了你的课程，检查一下，希望它能起作用。
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {
private List<Animal> AnimalList;
public Context ctx;
public static int postionchange=-1;
public static Tab1Birds t1;
final int[] countLike = {0};
//public static MediaPlayer mediaPlayer2 = new MediaPlayer();
int pos;
public class MyViewHolder extends RecyclerView.ViewHolder {
public ImageView display;
public TextView nameTextView;
public ImageButton play,options,menubtn;
public MyViewHolder(View view) {
super(view);
nameTextView = (TextView) view.findViewById(R.id.nameTextView);
play=(ImageButton)view.findViewById(R.id.playbtn);
options=(ImageButton)view.findViewById(R.id.menubtn);
display=(ImageView)view.findViewById(R.id.imageview);
menubtn = (ImageButton) view.findViewById(R.id.menubtn);
//MediaPlayerClass.mediaPlayer= new MediaPlayer();
}
}
public CustomAdapter(List<Animal> moviesList,Context ct) {
this.AnimalList = moviesList;
this.ctx=ct;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row_list, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
final Animal animal = AnimalList.get(position);
final int[] previous = {position};
holder.nameTextView.setText(animal.getName());
holder.display.setImageResource(animal.getImageResource());
//////////////////////////////////////////////////////////////////////////////////////////////////////////
holder.options.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
if (MediaPlayerClass.mediaPlayer.isPlaying()) {
holder.play.setBackgroundResource(R.drawable.play_btn);
MediaPlayerClass.mediaPlayer.stop();
}
} catch (Exception ex) {
}
Dialog dialog;
final String[] items = {"SET AS RING TUNE", "SET AS MESSAGE TUNE", "SET AS ALARM TUNE"};
final ArrayList itemsSelected = new ArrayList();
final AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
builder.setTitle("OPTIONS");
builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int selectedItemId,
boolean isSelected) {
if (isSelected) {
itemsSelected.add(selectedItemId);
} else if (itemsSelected.contains(selectedItemId)) {
itemsSelected.remove(Integer.valueOf(selectedItemId));
}
}
})
.setPositiveButton("Done!", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
Toast toast = Toast.makeText(ctx, "successfully selected", Toast.LENGTH_SHORT);
toast.show();
SparseBooleanArray CheCked = ((AlertDialog) dialog).getListView().getCheckedItemPositions();
String str = "";
if (CheCked.get(0)) {
savering(animal.getSoundResource());
}
if (CheCked.get(1)) {
savemsg(animal.getSoundResource());
}
if (CheCked.get(2)) {
savealarm(animal.getSoundResource());
}
// if (CheCked.get(3)) {
// DatabaseHelper.save_bookmarks(itemsList.get(position).getitemName(), R.drawable.play_btn, itemsList.get(position).getItemTuneSt());
// Toast.makeText(ctx, "Item added to favourites", Toast.LENGTH_SHORT).show();
// }
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
});
dialog = builder.create();
dialog.show();
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}
});
// for animation
// ///////////////////////////
//animate(holder);//Function for animation
//////////////////////////////
holder.play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
pos=position;
notifyDataSetChanged();
}
});
if (pos == position){
holder.play.setBackgroundResource(R.drawable.pause_btn);// present state
MediaPlayerClass.play(animal.getSoundResource(),ctx);
if(countLike[0] ==0)
{
countLike[0] =1;
}else if(countLike[0] ==1)
{
//if is playing then Pause
if(MediaPlayerClass.mediaPlayer.isPlaying())
MediaPlayerClass.mediaPlayer.stop();
t1.recyclerView.setAdapter(null);
t1.customAdapter=new CustomAdapter(t1.animalList,ctx);
t1.recyclerView.setAdapter(t1.customAdapter);
holder.play.setBackgroundResource(R.drawable.play_btn); //sound stop show play button
countLike[0] =2;
}
if(countLike[0] >1)
{
countLike[0] =0;
holder.play.setBackgroundResource(R.drawable.play_btn); // click to play music, click again to stop music
}
//setOnCompletionListener
MediaPlayerClass.mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
holder.play.setBackgroundResource(R.drawable.play_btn);
}
});
// MediaPlayerClass.mediaPlayer.start();
}else {
holder.play.setBackgroundResource(R.drawable.play_btn);
}
}
@Override
public int getItemCount() {
return AnimalList.size();
}
//animation
public void animate(RecyclerView.ViewHolder viewHolder) {
final Animation animAnticipateOvershoot = AnimationUtils.loadAnimation(ctx, R.anim.bounce_interpolator);
viewHolder.itemView.setAnimation(animAnticipateOvershoot);
}
}
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