我从Firebase检索一些数据并使用RecyclerView显示。
我的RecyclerView中有卡片，其中会检索文字和图片。
卡片上有一个按钮，开始floaty。 floaty有一个ImageView和一个TextView，其中应显示卡片中从中点击按钮的图像和文本。
问题在于，当点击第一张卡片的那个按钮时，浮动正在开始并显示来自相应卡片的图像和文本，但是当我按下另一张卡片的按钮以启动浮动，浮动启动但是相应卡中的图像和文字未显示在其中。
这是我的代码：
@Override
public void bindView(final ViewHolder holder) {
super.bindView(holder);
holder.progressBar.findViewById(R.id.progressBar_loading_image);
holder.imageUID.setText(imageUIDh);
holder.hDescription.setText(hDescription);
if (imageUIDh != null) {
holder.progressBar.setVisibility(View.VISIBLE);
if (imageUIDh.startsWith("https://firebasestorage.googleapis.com/") || imageUIDh.startsWith("content://")) {
Picasso.with(holder.itemView.getContext()).cancelRequest(holder.homelessImage);
Picasso.with(holder.itemView.getContext())
.load(imageUIDh)
.error(R.drawable.ic_warning_black_24dp)
.into(holder.homelessImage, new Callback() {
@Override
public void onSuccess() {
holder.progressBar.setVisibility(View.INVISIBLE);
}
@Override
public void onError() {
// TODO Auto-generated method stub
Toast.makeText(holder.itemView.getContext(), "Error occurred while loading images. Please retry.", Toast.LENGTH_SHORT).show();
}
});
final View head = LayoutInflater.from(holder.itemView.getContext()).inflate(R.layout.widget_chathead, null);
final View body = LayoutInflater.from(holder.itemView.getContext()).inflate(R.layout.content_help_request_chat_head, null);
holder.progressBar2 = (ProgressBar) body.findViewById(R.id.progressBar_loading_image_ch);
final ImageView hImageInFloaty = (ImageView) body.findViewById(R.id.hImageHF);
final TextView hDescriptionInFloaty = (TextView) body.findViewById(R.id.hDescriptionHF);
holder.btn_accept = (Button) holder.itemView.findViewById(R.id.btn_accept);
holder.btn_accept.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (holder.isNetworkAvailable()) {
AlertDialog.Builder builder = new AlertDialog.Builder(holder.itemView.getContext());
builder.setMessage(R.string.request_accepted_txt);
builder.setPositiveButton("Yes button", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
holder.floaty = Floaty.createInstance(holder.itemView.getContext(), head, body, holder.NOTIFICATION_ID, notification);
holder.floaty.startService();
hDescriptionInFloaty.setText(holder.hDescription.getText().toString());
Picasso.with(holder.itemView.getContext())
.load(imageUIDh)
.error(R.drawable.ic_warning_black_24dp)
.into(hImageInFloaty, new Callback() {
@Override
public void onSuccess() {
holder.progressBar2.setVisibility(View.GONE);
}
@Override
public void onError() {
// TODO Auto-generated method stub
}
});
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(holder.itemView.getContext(), "The help-request has been rejected.", Toast.LENGTH_LONG).show();
}
});
AlertDialog dialog = builder.create();
dialog.show();
} else {
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(holder.itemView.getContext());
builder.setTitle("No internet connection!");
builder.setMessage("We need internet connection to navigate you more accurately. Please connect to the internet and then accept the help-request.");
builder.setPositiveButton("Open Settings", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent = new Intent(Settings.ACTION_SETTINGS);
holder.itemView.getContext().startActivity(intent);
}
});
builder.setNegativeButton("Cancel", null);
builder.show();
}
}
});
}
由于浮动需要获得许可，我在获得许可后会填充recyclerview（仅适用于Android M及以上版本）。这是代码：
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
startFloatyForAboveAndroidL();
}
此处的tartFloatyForAboveAndroidL()：
@TargetApi(Build.VERSION_CODES.M)
public void startFloatyForAboveAndroidL() {
if (!Settings.canDrawOverlays(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:" + getPackageName()));
intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivityForResult(intent, PERMISSION_REQUEST_CODE);
} else {
recyclerView.setAdapter(fastItemAdapter);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_CODE){
mSheetLayout.contractFab();
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (requestCode == PERMISSION_REQUEST_CODE) {
if (Settings.canDrawOverlays(this)) {
recyclerView.setAdapter(fastItemAdapter);
} else {
Spanned message = Html.fromHtml("Please allow this permission, so <b>Floaties</b> could be drawn.");
Toast.makeText(this, message, Toast.LENGTH_LONG).show();
}
}
}
}
代码： -
protected static class ViewHolder extends RecyclerView.ViewHolder {
ImageView hImage;
TextView imageUID, hDescription;
View head, body;
Floaty floaty;
TextView hDescroptionInFloaty;
ImageView hImageInFloaty;
Notification notification;
Button btn_accept;
ProgressBar progressBar, progressBar2;
AppCompatButton btnCloseFloaty;
private static final int NOTIFICATION_ID = 1500;
public ViewHolder(final View itemView) {
super(itemView);
Intent intent = new Intent(itemView.getContext(), HelpRequest.class);
PendingIntent resultPendingIntent = PendingIntent.getActivity(itemView.getContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
notification = Floaty.createNotification(itemView.getContext(), "HumaneHelper", "Floaty has started with homeless's pic and description", R.mipmap.ic_launcher, resultPendingIntent);
head = LayoutInflater.from(itemView.getContext()).inflate(R.layout.widget_chathead, null);
// You should not add click listeners to head as it will be overridden, but the purpose of not making head just
// an ImageView is so you can add multiple views in it, and show and hide the relevant views to notify user etc.
body = LayoutInflater.from(itemView.getContext()).inflate(R.layout.content_help_request_chat_head, null);
floaty = Floaty.createInstance(itemView.getContext(), head, body, NOTIFICATION_ID, notification);
btnCloseFloaty = (AppCompatButton) body.findViewById(R.id.btn_close_floaty);
btnCloseFloaty.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
floaty.stopService();
}
});
hDescroptionInFloaty = (TextView) body.findViewById(R.id.hDescriptionHF);
hImageInFloaty = (ImageView) body.findViewById(R.id.hImageHF);
}
此处bindView()：
@Override
public void bindView(final ViewHolder holder) {
super.bindView(holder);
holder.imageUID.setText(imageUIDh);
holder.hDescription.setText(hDescription);
if (imageUIDh != null) {
holder.progressBar2 = (ProgressBar) holder.body.findViewById(R.id.progressBar_loading_image_ch);
holder.btn_accept = (Button) holder.itemView.findViewById(R.id.btn_accept);
View.OnClickListener() {
@Override
public void onClick(View view) {
if (holder.isNetworkAvailable()) {
holder.hDescroptionInFloaty.setText(holder.hDescription.getText().toString());
Picasso.with(holder.itemView.getContext())
.load(imageUIDh)
.error(R.drawable.ic_warning_black_24dp)
.into(holder.hImageInFloaty, new Callback() {
@Override
public void onSuccess() {
holder.progressBar2.setVisibility(View.GONE);
}
@Override
public void onError() {
// TODO Auto-generated method stub
}
});
Toast.makeText(holder.itemView.getContext(), "updated: " + holder.homelessDescroptionInFloaty.getText(), Toast.LENGTH_LONG).show();
AlertDialog.Builder builder = new AlertDialog.Builder(holder.itemView.getContext());
builder.setMessage(R.string.request_accepted_txt);
builder.setPositiveButton("Navigate me", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
holder.floaty = Floaty.createInstance(holder.itemView.getContext(), holder.head, holder.body, holder.NOTIFICATION_ID, holder.notification);
holder.floaty.startService();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(holder.itemView.getContext(), "The help-request has been rejected.", Toast.LENGTH_LONG).show();
}
});
AlertDialog dialog = builder.create();
dialog.show();
} else {
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(holder.itemView.getContext());
builder.setTitle("No internet connection!");
builder.setMessage("We need internet connection to navigate you more accurately. Please connect to the internet and then accept the help-request.");
builder.setPositiveButton("Open Settings", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent = new Intent(Settings.ACTION_SETTINGS);
holder.itemView.getContext().startActivity(intent);
}
});
builder.setNegativeButton("Cancel", null);
builder.show();
}
}
});
} else {
Toast.makeText(holder.itemView.getContext(), "some problem", Toast.LENGTH_SHORT).show();
}
}
这里发生了什么错误？如何从单击其按钮的卡片中获取文本和图像？
答案 0 :(得分：1)
如果你看一下Floaty代码here。您会注意到它使用SingletonPattern。因此，这是它第一次工作的原因，但之后，它显示不正确的数据。一个解决方案是扩展Floaty类，并添加自己的createInstance方法。方法的主体将是这样的：
public static synchronized Floaty createInstance(Context context, View head, View body, int notificationId, Notification notification, FloatyOrientationListener
floatyOrientationListener) {
if (floaty == null) {
floaty = new Floaty(context, head, body, notificationId, notification, floatyOrientationListener);
}else {
floaty.stopService();
floaty = null;
floaty = new Floaty(context, head, body, notificationId, notification, floatyOrientationListener);
}
return floaty;
}
我希望这有效。
方法2
另一个更简单的方法是，您只需将Floaty初始化一次。然后只需获得持有者身体的参考，并从持有者修改ImageView和TextView。
答案 1 :(得分：0)
我试图重写你的代码。
我不知道imageUIDh的类，但我猜它是字符串。
imageUIDh未在您的代码中定义，因此我不知道您从哪里进来。但我已将字段imageUIDh添加到ViewHolder中。您应该在每个bindView上更新它。
某些行应移至ViewHolder的构造函数
我已将ViewHolder添加为btn_accept的标记，因此您可以为所有ViewHolders使用一个clickListener。
现在代码中的嵌套要少得多 - 它更容易阅读，调试和查找问题。 可能问题现在已经解决了
@Override
public void bindView(final ViewHolder holder) {
super.bindView(holder);
holder.progressBar.findViewById(R.id.progressBar_loading_image);
holder.imageUID.setText(imageUIDh);
holder.imageUIDh = imageUIDh;
holder.hDescription.setText(hDescription);
/// THESE 2 LINES SHOULD BE DONE IN HOLDER'S CONSTRUCTOR!!!!!
holder.btn_accept = (Button) holder.itemView.findViewById(R.id.btn_accept);
holder.btn_accept.setTag(holder);
if (imageUIDh != null) {
holder.progressBar.setVisibility(View.VISIBLE);
if (imageUIDh.startsWith("https://firebasestorage.googleapis.com/") || imageUIDh.startsWith("content://")) {
doSomethingWithPicaso(imageUIDh, holder.homelessImage);
/*
/// THESE LINES ARE BE MOVED INTO onClick()
final View head = LayoutInflater.from(holder.itemView.getContext()).inflate(R.layout.widget_chathead, null);
final View body = LayoutInflater.from(holder.itemView.getContext()).inflate(R.layout.content_help_request_chat_head, null);
final ImageView hImageInFloaty = (ImageView) body.findViewById(R.id.hImageHF);
final TextView hDescriptionInFloaty = (TextView) body.findViewById(R.id.hDescriptionHF);
*/
holder.btn_accept.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ViewHolder holder = (ViewHolder) view.getTag();
if (holder.isNetworkAvailable()) {
showOnNetworkAvailableAlertDialog(view.getContext(), holder.imageUIDh, holder.hDescription.getText().toString());
} else {
showNoNetworkAlert(view.getContext());
}
}
});
}
}
}
private void doSomethingWithPicaso(String imageUIDh, ImageView target, final HolderView holder){
final Context context = target.getContext();
Picasso.with(context).cancelRequest(holder.homelessImage);
Picasso.with(context)
.load(imageUIDh)
.error(R.drawable.ic_warning_black_24dp)
.into(target, new Callback() {
@Override
public void onSuccess() {
holder.progressBar.setVisibility(View.INVISIBLE);
}
@Override
public void onError() {
Toast.makeText(context, "Error occurred while loading images. Please retry.", Toast.LENGTH_SHORT).show();
}
});
}
private void showOnNetworkAvailableAlertDialog(final Context context, final String imageUIDh, final String descriptionText){
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage(R.string.request_accepted_txt);
builder.setPositiveButton("Yes button", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
final View head = LayoutInflater.from(context).inflate(R.layout.widget_chathead, null);
final View body = LayoutInflater.from(context).inflate(R.layout.content_help_request_chat_head, null);
final ImageView hImageInFloaty = (ImageView) body.findViewById(R.id.hImageHF);
final TextView hDescriptionInFloaty = (TextView) body.findViewById(R.id.hDescriptionHF);
final View progressBar = body.findViewById(R.id.progressBar_loading_image_ch);
holder.floaty = Floaty.createInstance(context, head, body, holder.NOTIFICATION_ID, notification);
holder.floaty.startService();
hDescriptionInFloaty.setText(descriptionText);
Picasso.with(context)
.load(imageUIDh)
.error(R.drawable.ic_warning_black_24dp)
.into(hImageInFloaty, new Callback() {
@Override
public void onSuccess() {
progressBar.setVisibility(View.GONE);
}
@Override
public void onError() {
// TODO Auto-generated method stub
}
});
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(holder.itemView.getContext(), "The help-request has been rejected.", Toast.LENGTH_LONG).show();
}
});
builder.show();
}
private void showNoNetworkAlert(final Context context){
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(context);
builder.setTitle("No internet connection!");
builder.setMessage("We need internet connection to navigate you more accurately. Please connect to the internet and then accept the help-request.");
builder.setPositiveButton("Open Settings", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent = new Intent(Settings.ACTION_SETTINGS);
context.startActivity(intent);
}
});
builder.setNegativeButton("Cancel", null);
builder.show();
}