android - Android：来自 Google Play 控制台的 java.lang.IllegalStateException
问题描述
有时，我的应用程序（来自 Google Play 控制台）中会出现异常：
java.lang.IllegalStateException:
at android.support.v4.app.Fragment.requireContext (Fragment.java:696)
at android.support.v4.app.Fragment.getResources (Fragment.java:760)
at com.my_domain.mu_app.TravelCostFragment$MyTextWatcherListener.onTextChanged (TravelCostFragment.java:195)
at android.widget.TextView.sendOnTextChanged (TextView.java:10099)
at android.widget.TextView.setText (TextView.java:5921)
at android.widget.TextView.setText (TextView.java:5759)
at android.widget.EditText.setText (EditText.java:122)
at android.widget.TextView.setText (TextView.java:5716)
at com.my_domain.mu_app.TravelCostFragment.updateLabelsUI (TravelCostFragment.java:119)
at com.my_domain.mu_app.TravelCostFragment.onSettingDialogDissmised (TravelCostFragment.java:173)
at com.my_domain.mu_app.MainActivity.onResultDialogClosed (MainActivity.java:182)
at com.my_domain.mu_app.BaseDialogFragment.onDismiss (BaseDialogFragment.java:135)
at android.app.Dialog$ListenersHandler.handleMessage (Dialog.java:1547)
at android.os.Handler.dispatchMessage (Handler.java:109)
at android.os.Looper.loop (Looper.java:207)
at android.app.ActivityThread.main (ActivityThread.java:7539)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:524)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:958)
我认为当用户关闭对话框或更改设备上的语言时会出现问题。但是，我无法在 Android Studio Emulator 中重现此问题。
这是 TravelCostFragment 的代码：
package com.my_domain.mu_app;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.my_domain.mu_app.interfaces.OnMainActivityListener;
import com.my_domain.mu_app.utilities.Helper;
import com.my_domain.mu_app.utilities.SharedPref;
import java.util.HashMap;
public class TravelCostFragment extends BaseFragment implements OnMainActivityListener {
private static String TAG = TravelCostFragment.class.getSimpleName();
public static final int TAB_POSITION = 0;
private TextView mLabelAverageFuelConsumption;
private TextView mLabelDistanceUnit;
private TextView mLabelPrice;
private TextView mLabelPersons;
private EditText mValueAverageFuelConsumption;
private EditText mValueDistanceUnit;
private EditText mValuePrice;
private EditText mValuePersons;
private LinearLayout mPersonsSection;
private Button mCalculateButton;
private View mSpace2;
public TravelCostFragment() {}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View layout = inflater.inflate(R.layout.fragment_travel_cost, container, false);
// Init widgets
mLabelAverageFuelConsumption = (TextView) layout.findViewById(R.id.labelAverageFuelConsumption);
mLabelDistanceUnit = (TextView) layout.findViewById(R.id.labelDistanceUnit);
mLabelPrice = (TextView) layout.findViewById(R.id.labelPrice);
mLabelPersons = (TextView) layout.findViewById(R.id.labelPersons);
mValueAverageFuelConsumption = (EditText) layout.findViewById(R.id.valueAverageFuelConsumption);
mValueDistanceUnit = (EditText) layout.findViewById(R.id.valueDistanceUnit);
mValuePrice = (EditText) layout.findViewById(R.id.valuePrice);
mValuePersons = (EditText) layout.findViewById(R.id.valuePersons);
mPersonsSection = (LinearLayout) layout.findViewById(R.id.personsSection);
mCalculateButton = (Button) layout.findViewById(R.id.calculateButton);
mSpace2 = (View) layout.findViewById(R.id.space2);
Helper.fineTuningText(mLabelAverageFuelConsumption);
Helper.fineTuningText(mLabelDistanceUnit);
Helper.fineTuningText(mLabelPrice);
Helper.fineTuningText(mLabelPersons);
// Prepare widgets
mValueAverageFuelConsumption.addTextChangedListener(new MyTextWatcherListener(mValueAverageFuelConsumption));
mValueDistanceUnit.addTextChangedListener(new MyTextWatcherListener(mValueDistanceUnit));
mValuePrice.addTextChangedListener(new MyTextWatcherListener(mValuePrice));
mValuePrice.setImeOptions(EditorInfo.IME_ACTION_DONE);
mValuePersons.addTextChangedListener(new MyTextWatcherListener(mValuePersons));
mCalculateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
HashMap<String, String> data = new HashMap<String, String>();
data.put(BaseDialogFragment.KEY_AVERAGE_FUEL, mValueAverageFuelConsumption.getText().toString());
data.put(BaseDialogFragment.KEY_DISTANCE, mValueDistanceUnit.getText().toString());
data.put(BaseDialogFragment.KEY_PRICE, mValuePrice.getText().toString());
data.put(BaseDialogFragment.KEY_PERSONS, mValuePersons.getText().toString());
SharedPref.getInstance(mContext).setAverageFuelConsumption(mValueAverageFuelConsumption.getText().toString());
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment prev = getFragmentManager().findFragmentByTag(TravelCalculationDialog.TRAVEL_CALCULATION_DIALOG);
if (prev != null) {
ft.remove(prev);
}
ft.addToBackStack(null);
DialogFragment dialog = TravelCalculationDialog.newInstance(data);
dialog.show(ft, TravelCalculationDialog.TRAVEL_CALCULATION_DIALOG);
}
});
// DEBUG data
/*mValueAverageFuelConsumption.setText("8");
mValueDistanceUnit.setText("320");
mValuePrice.setText("2.39");
mValuePersons.setText("4");*/
updateLabelsUI();
return layout;
}
// ---------------------------------------------------------------------------------------------
// Auxiliary methods
// ---------------------------------------------------------------------------------------------
private void updateLabelsUI() {
try {
mLabelAverageFuelConsumption.setText(Helper.get(mContext).getAverageFuelLabel());
mLabelDistanceUnit.setText(Helper.get(mContext).getDistanceLabel());
mLabelPrice.setText(Helper.get(mContext).getPriceLabel());
String averFuelCons = SharedPref.getInstance(mContext).getAverageFuelConsumption();
if (averFuelCons != null && !averFuelCons.isEmpty()) {
mValueAverageFuelConsumption.setText(SharedPref.getInstance(mContext).getAverageFuelConsumption());
}
mValueAverageFuelConsumption.setHint(Helper.get(mContext).getAverageFuelHint());
} catch (NullPointerException e) {
}
}
private void visibilityPeopleLinearLayout() {
double price = 0d;
String valuePrice = mValuePrice.getText().toString();
if (!valuePrice.isEmpty()) {
try {
price = Double.parseDouble(valuePrice);
} catch(NumberFormatException e) {}
}
if (price > 0) {
mSpace2.setVisibility(View.VISIBLE);
mPersonsSection.setVisibility(View.VISIBLE);
} else {
mSpace2.setVisibility(View.GONE);
mPersonsSection.setVisibility(View.GONE);
}
}
private void visibilityCalculateButton() {
double averageFuel = 0d, distance = 0d;
String valueAverageFuel = mValueAverageFuelConsumption.getText().toString();
String valueDistance = mValueDistanceUnit.getText().toString();
if (!valueAverageFuel.isEmpty()) {
try {
averageFuel = Double.parseDouble(valueAverageFuel);
} catch(NumberFormatException e) {}
}
if (!valueDistance.isEmpty()) {
try {
distance = Double.parseDouble(valueDistance);
} catch(NumberFormatException e) {}
}
if (averageFuel > 0 && distance > 0) {
mCalculateButton.setEnabled(true);
} else {
mCalculateButton.setEnabled(false);
}
}
@Override
public void onSettingDialogDissmised() {
updateLabelsUI();
}
// ---------------------------------------------------------------------------------------------
// Auxiliary inner classes
// ---------------------------------------------------------------------------------------------
private class MyTextWatcherListener implements TextWatcher {
private EditText mEdit;
public MyTextWatcherListener(EditText edit) {
mEdit = edit;
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (getResourceName().equals( getResources().getResourceName(R.id.valuePrice) )) {
visibilityPeopleLinearLayout();
} else {
visibilityCalculateButton();
}
}
@Override
public void afterTextChanged(Editable s) {
}
private String getResourceName() {
return mEdit.getResources().getResourceName(mEdit.getId());
}
}
}
请帮助解决这个问题。
解决方案
这是因为在您脱离活动MyTextWatcherListener后仍会触发您。TravelCostFragment当您的片段被销毁时，您可以尝试从编辑文本中删除侦听器
MyTextWatcherListener averageFuelConsumptionWatcher = null;
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
averageFuelConsumptionWatcher = new MyTextWatcherListener(mValueAverageFuelConsumption)
mValueAverageFuelConsumption.addTextChangedListener(averageFuelConsumptionWatcher);
}
@Override
public void onDestroyView() {
averageFuelConsumptionWatcher = null;
super.onDetach();
}
推荐阅读
- pyspark - Pyspark 根据今天的日期获取上一季度的最后日期
- android-studio - 切换后将文本视图设置为空白文本
- azure - 如何限制对子网的 Internet 访问，并仅允许来自同一 vnet 的另一个子网？
- python-3.7 - vtkCommonCorePython 在 Ubuntu 20 上的 python3-paraview 中缺少错误
- python - 启动使用 pyinstaller 编译的 python windows 服务时出错
- r - 重复样本并将它们添加到数据框中
- python - 在创建 Google Cloud Platform 部署后为其添加标签
- r - 替换数据表中多次出现的字符串模式
- ruby-on-rails - 查询使用 Ruby on Rails 加分最多的前 15 位用户？
- macos - Apple Pages：如何完全删除表格的maring/padding