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android - 使用 100 个 EditFields 和 TextFields 开发应用程序

问题描述

我正在开发一个包含 100 个文本字段和编辑字段的应用程序。在其中很多中，我使用 textwatcher 来收听更改并更新其他文本字段。我在这件事上没有太多选择，因为很多领域都是相互依赖的。但是该应用程序遇到了很多性能问题。它冻结了很多。我可以得到一些关于开发具有大量文本字段的应用程序的提示吗？我认为我使用的所有文本观察器都在减慢 ui 线程。

  //Business Operating Cost
        TextWatcher businessOperatingCostTextWatcher = new TextWatcher() {
            private double edtTaxPayment = 0.0;
            private double txtPaymentBusinessLoan = 0.0;
            private double edtOtherBusiness = 0.0;
            private double edtBasicServices = 0.0;
            private double edtTransport = 0.0;
            private double edtLocalRental = 0.0;
            private double edtSalaries = 0.0;
            private double unforeseen = 0.0;

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                if (mCashFlowBinding.edtSalaries != null && mCashFlowBinding.edtSalaries.length() != 0) {
                    edtSalaries = Double.parseDouble(mCashFlowBinding.edtSalaries.getText().toString());
                }
                if (mCashFlowBinding.edtLocalRental != null && mCashFlowBinding.edtLocalRental.length() != 0) {
                    edtLocalRental = Double.parseDouble(mCashFlowBinding.edtLocalRental.getText().toString());
                }
                if (mCashFlowBinding.edtTransport != null && mCashFlowBinding.edtTransport.length() != 0) {
                    edtTransport = Double.parseDouble(mCashFlowBinding.edtTransport.getText().toString());
                }
                if (mCashFlowBinding.edtBasicServices != null && mCashFlowBinding.edtBasicServices.length() != 0) {
                    edtBasicServices = Double.parseDouble(mCashFlowBinding.edtBasicServices.getText().toString());
                }
                if (mCashFlowBinding.edtOtherBusiness != null && mCashFlowBinding.edtOtherBusiness.length() != 0) {
                    edtOtherBusiness = Double.parseDouble(mCashFlowBinding.edtOtherBusiness.getText().toString());
                }
                if (mCashFlowBinding.txtPaymentBusinessLoan != null && mCashFlowBinding.txtPaymentBusinessLoan.length() != 0) {
                    txtPaymentBusinessLoan = Double.parseDouble(mCashFlowBinding.txtPaymentBusinessLoan.getText().toString());
                }
                if (mCashFlowBinding.edtTaxPayment != null && mCashFlowBinding.edtTaxPayment.length() != 0) {
                    edtTaxPayment = Double.parseDouble(mCashFlowBinding.edtTaxPayment.getText().toString());
                }
                if (mCashFlowBinding.txtUnforseen != null && mCashFlowBinding.txtUnforseen.length() != 0) {
                    unforeseen = Double.parseDouble(mCashFlowBinding.txtUnforseen.getText().toString());
                }
                double resultSum = (edtTaxPayment + txtPaymentBusinessLoan + edtOtherBusiness + edtBasicServices + edtTransport + edtLocalRental + edtSalaries + unforeseen);

                if (!Double.isNaN(resultSum) && !Double.isInfinite(resultSum)) {
                    mCashFlowBinding.txtBusinessOperatingCost1.setText(String.valueOf(resultSum));
                } else {
                    mCashFlowBinding.txtBusinessOperatingCost1.setText("0.0");
                }
            }
        };

        mCashFlowBinding.edtSalaries.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.edtLocalRental.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.edtTransport.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.edtBasicServices.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.edtOtherBusiness.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.txtPaymentBusinessLoan.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.edtTaxPayment.addTextChangedListener(businessOperatingCostTextWatcher);
        mCashFlowBinding.txtUnforseen.addTextChangedListener(businessOperatingCostTextWatcher);

标签： androidandroid-studioandroid-textwatcher

解决方案

您可以做些什么来缓解主 UI 线程：

将 ViewModel 的一些 LiveData 暴露给 View，然后调用postValueTextWatcher。然后它迅速释放。

在 LiveData 观察者中，您可以在单独的线程上处理处理并将结果再次发送到 LiveData 对象finalOperstingCosts。

然后在此 LiveData 的观察者中将 Text 设置为该字段。

这样你就不会在主线程上运行长时间的任务。

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