Question

在我的Android Studio项目中，我有一个带有约束布局的片段。这是XML。

        <android.support.constraint.ConstraintLayout
            android:id="@+id/pinLayout"
            android:layout_width="match_parent"
            android:layout_height="250dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/topLayout">

            <android.support.constraint.ConstraintLayout
                android:layout_width="0dp"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@+id/constraintLayout"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                tools:visibility="visible">

                <TextView
                    android:id="@+id/numberTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="8dp"
                    android:gravity="top"
                    android:text="00000000"
                    android:textColor="@color/appTintColor"
                    android:textSize="18sp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />
            </android.support.constraint.ConstraintLayout>

            <android.support.constraint.ConstraintLayout
                android:id="@+id/constraintLayout2"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHeight_percent="0.4"
                app:layout_constraintStart_toStartOf="parent">

                <Button
                    android:id="@+id/confirmButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@drawable/rounded_corner_shape_tint"
                    android:paddingLeft="16dp"
                    android:paddingRight="16dp"
                    android:text="Confirm Pin"
                    android:textColor="@color/appMainColor"
                    android:textSize="14sp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />
            </android.support.constraint.ConstraintLayout>

            <android.support.constraint.ConstraintLayout
                android:id="@+id/constraintLayout"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@+id/constraintLayout2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHeight_percent="0.4"
                app:layout_constraintStart_toStartOf="parent">

                <LinearLayout
                    android:layout_width="0dp"
                    android:layout_height="0dp"
                    android:orientation="horizontal"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent">

                    <TextView
                        android:id="@+id/pinView1"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView2"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView3"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />

                    <TextView
                        android:id="@+id/pinView4"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_weight="0.25"
                        android:gravity="center"
                        android:text="-"
                        android:textColor="@color/appTintColor"
                        android:textSize="36sp" />
                </LinearLayout>
            </android.support.constraint.ConstraintLayout>

        </android.support.constraint.ConstraintLayout>

如您所见，“确认”按钮位于其父项的约束中心。

但是当我在Xperia z5 Compact中运行应用程序时，布局检查器显示按钮未居中。

为什么会发生以及如何解决？

注意，如果我要删除其父constarintLayout的numberTextView，该问题将消失。注意，在我的代码中，我以编程方式将文本设置为numberTextView。如果我在注释该代码（即不以编程方式设置文本）时，按钮会正确绘制。

这是代码部分，我将文本设置为NumberTextView

private void performInitialLayout() {
    fragmentViewHeight = fragmentView.getHeight();

    ViewRelatedUtils.setHeightPercentage(topView, scrollView, 0.3);
    ViewRelatedUtils.setHeightPercentage(pinLayout, scrollView, 0.4);

    // here I am setting a text.
    numberTextView.setText(number);

    if (isProcessingPinConfirmation) showProcessing(); else hideProcessing();

    wrapperView.requestFocus();

    performedInitialLayout = true;
}

Answer 1

请阅读我对这个问题的评论，尽管我对您的布局进行了一些更改，请查看

根据您的要求更改颜色。

@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    //Type of View which is ROW(0) or HEADER(1)
    int type = getItemViewType(position);

    //If there is no View create it,
    if (convertView == null) {
        inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        switch (type) {
            case ROW:
                convertView = inflater.inflate(R.layout.activity_transaction_items, null);
                break;
            case HEADER:
                convertView = inflater.inflate(R.layout.activity_transaction_header, null);
                convertView.setBackgroundColor(Color.rgb(220,220,220));

            default:
                break;
        }
    }

    switch (type){
        case ROW:
            ProfitTransactions transaction = (ProfitTransactions)getItem(position);

            TextView tvDay = (TextView)convertView.findViewById(R.id.day);
            TextView tvTID = (TextView)convertView.findViewById(R.id.tID);
            TextView tvTotalPrice = (TextView)convertView.findViewById(R.id.totalPrice);
            TextView tvTimeOrder = (TextView)convertView.findViewById(R.id.tvTime);

            Log.d("transadapter","-----Test: " + Integer.parseInt(transaction.getDayOfOrder()));
            tvDay.setText(transaction.getDayOfOrder()+ getDayNumberSuffix(Integer.parseInt(transaction.getDayOfOrder())));
            tvTID.setText("TID: " + transaction.gettId());
            tvTotalPrice.setText("+$"+String.format("%.2f", transaction.getTotalPrice()));
            tvTimeOrder.setText("At: " + transaction.getTimeOfOrder());

            convertView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

            ProfitTransactions transaction = (ProfitTransactions)getItem(position);
            //Create the Dialog Box
            AlertDialog.Builder builder = new AlertDialog.Builder(c);

            //Put message in the Dialog Box
            builder.setMessage("Name: " + transaction.getName() + "\n" +
                    "Price: " + transaction.getPrice() + "\n" +
                    "Quantity: " + transaction.getQuantity() + "\n" +
                    "Total Price: " + transaction.getTotalPrice() + "\n"
            )

                    //If user click Yes
                    .setPositiveButton("Close", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {



                        }
                    });



            //Show the dialog after creating
            AlertDialog dialog = builder.show();
        }
    });
            break;
        case HEADER:
            String header = (String)getItem(position);
            // from string to date

            SimpleDateFormat inputFormat = new SimpleDateFormat("MM/yyyy");
            Date date = null;
            try {
                date = inputFormat.parse(header);
            } catch (ParseException e) {
                e.printStackTrace();
            }

            // from date to string
            SimpleDateFormat outputFormat = new SimpleDateFormat("MMM yyyy");
            String dateTime = outputFormat.format(date);


            TextView tvMonthYear = (TextView)convertView.findViewById(R.id.tvHeaderMonthYear);
            tvMonthYear.setText(dateTime);

            default:
                break;
    }

    return convertView;

}

Android Studio无法正确绘制按钮，向下移动

1 个答案: