我仅在android 4.4 kitKat中单击IllegalStateException，我已经在andorid 9.0，android 8.0，android 7.0和android 5.1上进行过尝试，并且在这些设备上都可以正常工作，但错误仅在安卓奇巧。我不确定我的代码有什么问题，请帮忙，我的应用程序正在生产中。
日志是由Firebase testLab生成的，因为我没有4.4设备：
at androidx.appcompat.app.AppCompatViewInflater$a.onClick(:2)
FATAL EXCEPTION: ControllerMessenger
Process: in.co.poket_play, PID: 31314
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$a.onClick(:2)
at android.view.View.performClick(View.java:4626)
at android.view.View$PerformClick.run(View.java:19293)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at androidx.test.espresso.base.Interrogator.a(Interrogator.java:19)
at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:166)
at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:158)
at androidx.test.espresso.base.UiControllerImpl.a(UiControllerImpl.java:34)
at androidx.test.espresso.action.MotionEvents.a(MotionEvents.java:77)
at androidx.test.espresso.action.MotionEvents.a(MotionEvents.java:52)
at androidx.test.espresso.action.Tap.c(Tap.java:8)
at androidx.test.espresso.action.Tap.b(Tap.java:18)
at androidx.test.espresso.action.Tap$1.a(Tap.java:3)
at androidx.test.espresso.action.GeneralClickAction.perform(GeneralClickAction.java:20)
at androidx.test.espresso.ViewInteraction$SingleExecutionViewAction.perform(ViewInteraction.java:9)
at androidx.test.espresso.ViewInteraction.a(ViewInteraction.java:79)
at androidx.test.espresso.ViewInteraction.a(ViewInteraction.java:96)
at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.java:3)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
... 29 more
Caused by: java.lang.NullPointerException: println needs a message
at android.util.Log.println_native(Native Method)
at android.util.Log.e(Log.java:298)
at in.co.poket_play.login_and_register.UserProfileActivity.saveData(:4)
创建时：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_profile);
profileImage = findViewById(R.id.profileImage);
fieldUsername = findViewById(R.id.textName);
fieldAge = findViewById(R.id.textAge);
fieldEmail = findViewById(R.id.textEmail);
sexGroup = findViewById(R.id.genderGroup);
maleBtn = findViewById(R.id.genderMale);
femaleBtn = findViewById(R.id.genderFemale);
mAuth = FirebaseAuth.getInstance();
functions = new FirebaseFunctions(this);
setProfileData();
}
这是OnClick方法：
public void saveData(View view){
try {
boolean isChanged = true;
RadioButton radioSexButton = findViewById(sexGroup.getCheckedRadioButtonId());
String newUsername = fieldUsername.getText().toString().trim();
String newAge = fieldAge.getText().toString().trim();
String newGender = radioSexButton.getText().toString().trim();
if(newUsername.length() > 0){
if(!newUsername.equals(username)) {
functions.updateUsername(newUsername);
isChanged = true;
}
}else {
fieldUsername.setError("Invalid username");
isChanged = false;
}
if(newAge.length() > 0){
if(!newAge.equals(String.valueOf(age))) {
functions.updateAge(Integer.parseInt(newAge));
isChanged = true;
}
}else {
fieldAge.setError("Invalid Age");
isChanged = false;
}
if(!newGender.equalsIgnoreCase(gender)){
functions.updateGender(newGender);
isChanged = true;
}
if(isChanged){
Toast.makeText(this, "Details Saved", Toast.LENGTH_SHORT).show();
finish();
}
}catch (Exception e){
Log.e("ERROR",e.getLocalizedMessage());
}
}
这是setProfileData方法：
private void setProfileData(){
FirebaseFirestore db = FirebaseFirestore.getInstance();
DocumentReference docRef = db.collection(getString(R.string.db_users)).document(Objects.requireNonNull(mAuth.getCurrentUser()).getUid());
listener = docRef.addSnapshotListener(new EventListener<DocumentSnapshot>() {
@Override
public void onEvent(@Nullable DocumentSnapshot documentSnapshot, @Nullable FirebaseFirestoreException e) {
if (documentSnapshot != null) {
User user = documentSnapshot.toObject(User.class);
if (user != null) {
username = user.getUsername();
email = user.getEmail();
age = user.getAge();
gender = user.getGender();
Glide.with(getApplicationContext())
.load(user.getProfile_image_url())
.placeholder(R.drawable.com_facebook_profile_picture_blank_square)
.into(profileImage);
fieldUsername.setText(username);
fieldEmail.setText(email);
fieldAge.setText(String.valueOf(age));
if (gender.equalsIgnoreCase(getString(R.string.textMale))) {
maleBtn.setChecked(true);
} else if (gender.equalsIgnoreCase(getString(R.string.textFemale))) {
femaleBtn.setChecked(true);
}
}
}
}
});
}
答案 0 :(得分：1)
问题可能不在您正在寻找的地方。您应该查看每个“ Causeed By”语句。
Caused by: java.lang.NullPointerException: println needs a message
at android.util.Log.println_native(Native Method)
at android.util.Log.e(Log.java:298)
at in.co.poket_play.login_and_register.UserProfileActivity.saveData(:4)
您应该查看此软件包- in.co.poket_play.login_and_register.UserProfileActivity.saveData 并检查您的saveData方法是否存在此异常。-“ NullPointerException”
答案 1 :(得分：0)
实际上，我试图获取已检查单选按钮的Id，因此当未选中任何单选按钮时，由于按钮ID不匹配，它引发了异常。所以我通过一个简单的if检查解决了它。但我仍然不知道，它在其他Android版本上如何工作。