我正在从 Firebase 中检索一些数据并使用 RecyclerView 显示它。
我的 RecyclerView 中有卡片，可以在其中检索文本和图像。
卡片上有一个按钮，可以启动 floaty。 . floaty 有一个 ImageView 和一个 TextView，其中应显示单击按钮的卡片中的图像和文本。
问题是，当单击第一张卡片的那个按钮时， float 开始并显示相应卡片中的图像和文本，但是当我按下另一张卡片的按钮启动 float 时， float 开始但相应卡片中的图像和文本未显示在其中。
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();
}
}
});
}
由于漂浮物需要许可，我在获得许可后填充 recyclerview(仅适用于 Android M 及更高版本)。这是代码:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
startFloatyForAboveAndroidL();
}
这是 startFloatyForAboveAndroidL():
@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();
}
}
}
}
尝试 Eric 的回答后的代码:--
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);
}
这里是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();
}
}
这里发生了什么问题？如何将点击其按钮的卡片中的文字和图片放入 float 中？
最佳答案
如果您看一下 Floaty 代码 here .您会注意到它使用了 SingletonPattern。因此，这就是它第一次工作但之后显示不正确数据的原因。一种解决方案是扩展 Floaty 类，并添加您自己的 createInstance 方法。方法的主体是这样的:
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;
}
我希望这能奏效。
方法二
想到的另一种更简单的方法是，只初始化 Floaty 一次。然后只需引用您的 holder 中的 body 并修改 holder 中的 ImageView 和 TextView。
关于android - 单击按钮后如何从 float 的相应 recyclerview 项目中获取相应的文本和图像？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38023880/