问题描述
我正在开发具有100个文本字段和editfields的应用程序。他们中的许多人都使用textwatcher来监听更改并更新其他文本字段。我在这个问题上没有太多选择，因为很多领域相互依赖。但是该应用程序遇到很多性能问题。它冻结了很多。我可以得到一些有关使用疯狂的文本字段开发应用程序的提示吗？我认为我使用的所有textwatcher都会减慢ui线程的速度。
//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 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);
解决方法
如何简化主UI线程：
将ViewModel的一些LiveData暴露给View，然后在TextWatcher中调用postValue。然后它会快速释放。
然后，您可以在LiveData观察器中处理单独的线程上的处理，并将结果再次发送到LiveData对象finalOperstingCosts。
然后在此LiveData的观察器中，将“文本”设置为字段。
这样，您就永远不会在主线程上长时间运行任务。