无法从 EditText 中获取文本
Unable to get Text out of EditText
所以我想读取 EditText 字段的输入。它不工作。我调试了它，我看到那里列出了 EditText 视图。但是当我把它打印到控制台时，它是空的。我不知道为什么，因为我确实在里面放了一段文字。还有，ID是对的，真不知道哪里不对
这是 EditText 所在的视图：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".counters.AddCounter">
<TextView
android:id="@+id/txtNewCounter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/allerta"
android:text="@string/addNewCounter"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btnSaveCounter"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="@font/allerta"
android:text="@string/save"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/txtCounterName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="20dp"
android:fontFamily="@font/allerta"
android:text='@string/newCounterName'
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtNewCounter" />
<EditText
android:id="@+id/inpuTextNewCounterName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="10dp"
android:contentDescription="@string/name"
android:ems="10"
android:hint="@string/name"
android:inputType="textPersonName"
android:singleLine="true"
android:text="Cookies don't"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtCounterName" />
<TextView
android:id="@+id/txtCounterEntryValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="20dp"
android:fontFamily="@font/allerta"
android:text="@string/entryNum"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/inpuTextNewCounterName" />
<EditText
android:id="@+id/numEntryNum"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="10dp"
android:layout_marginEnd="10dp"
android:ems="10"
android:hint="@string/number"
android:inputType="number"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtCounterEntryValue" />
</androidx.constraintlayout.widget.ConstraintLayout>
这是我用来评估表单的代码：
public class AddCounter extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_counter);
//Setting save button action listener
findViewById(R.id.btnSaveCounter).setOnClickListener(new ActionListeners().getSaveCounter());
}
public static void evaluateCounter(View view) throws NoNameException, NumberOutOfBoundException {
//Getting context
Context context = view.getContext();
//Counter Name
View viewEdit = View.inflate(context, R.layout.activity_add_counter, null);
EditText counterName = viewEdit.findViewById(R.id.inpuTextNewCounterName);
System.out.println("Cookies fly like:" + counterName.getText().toString() + "!");
//Input to string
String name = counterName.getText().toString();
//If no name was specified exception thrown
if (name.equals("")) {
throw new NoNameException(context.getString(R.string.noNameSpecified));
}
//get entry number
EditText numberView = View.inflate(context, R.layout.activity_add_counter, null).findViewById(R.id.numEntryNum);
//Number
int number = 0;
//If nothing specified
if (!(numberView.getText().toString().equals(""))) {
if (Integer.parseInt(numberView.getText().toString()) > 1000 || Integer.parseInt(numberView.getText().toString()) < -1000) {
throw new NumberOutOfBoundException(context.getString(R.string.numOutOfBound));
}
}
//New Counter Object
Counter counter = new Counter(number, name);
//storing counter
ToJson toJson = new ToJson();
toJson.storeCounter(counter, context);
}
}
正如您在此处看到的，此 if 陈述始终为真。
看看，文字长什么样，我打印了一段文字：
System.out.println("Cookies fly like:" + counterName.getText().toString() + "!");
我确实在输入中输入了一个词，但输出为空，如您所见：
I/System.out: Cookies fly like:!
这是我的 ActionListener：¨
public class ActionListeners {
private OnClickListener saveCounter = v -> {
try {
//Evaluate Counter
AddCounter.evaluateCounter(v);
} catch (NoNameException e) {
//If no name was specified
CounterMethods.makeSnackbar(v, Snackbar.LENGTH_SHORT, HapticFeedbackConstants.REJECT, v.getContext().getString(R.string.noNameSpecified));
e.printStackTrace();
} catch (NumberOutOfBoundException e) {
//If entry is higher or lower than available
CounterMethods.makeSnackbar(v, Snackbar.LENGTH_SHORT, HapticFeedbackConstants.REJECT, v.getContext().getString(R.string.numOutOfBound));
}
};
public OnClickListener getSaveCounter() {
return this.saveCounter;
}
}
如您所见，我确实在 xml 文件中将文本设置为“Cookies can't fly”，但是，如果我在应用程序中将文本更改为不同的内容，输出是我在 XML.
中设置的文本
I/System.out: Cookies fly like:Cookies can't fly!
有什么问题？
试试这个
public class AddCounter extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_counter);
//declare Counter Name EditText
EditText counterName = findViewById(R.id.inpuTextNewCounterName);
//declare btnSaveCounter Button
Button btnSaveCounter = findViewById(R.id.btnSaveCounter);
//declare get entry number EditText
EditText numberView = findViewById(R.id.numEntryNum);
//btnSaveCounter setOnClickListener
btnSaveCounter.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
//Input to string
String name = counterName.getText().toString();
System.out.println("Cookies fly like:" + name + "!");
//If no name was specified
if (name.equals("")){
System.out.println( "getString(R.string.noNameSpecified)" );//todo
}
//If nothing specified
String numbrv = numberView.getText().toString();
if (!(numbrv.equals(""))){
if (Integer.parseInt(numbrv) > 1000 || Integer.parseInt(numbrv) < -1000) {
System.out.println( "getString(R.string.numOutOfBound)" );//todo
}
}
//Number
int number = 0;
//New Counter Object
Counter counter = new Counter(number, name);
//storing counter
ToJson toJson = new ToJson();
toJson.storeCounter(counter, context);
} });
}
}
所以我想读取 EditText 字段的输入。它不工作。我调试了它，我看到那里列出了 EditText 视图。但是当我把它打印到控制台时，它是空的。我不知道为什么，因为我确实在里面放了一段文字。还有，ID是对的，真不知道哪里不对
这是 EditText 所在的视图：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".counters.AddCounter">
<TextView
android:id="@+id/txtNewCounter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/allerta"
android:text="@string/addNewCounter"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btnSaveCounter"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:fontFamily="@font/allerta"
android:text="@string/save"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/txtCounterName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="20dp"
android:fontFamily="@font/allerta"
android:text='@string/newCounterName'
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtNewCounter" />
<EditText
android:id="@+id/inpuTextNewCounterName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="10dp"
android:contentDescription="@string/name"
android:ems="10"
android:hint="@string/name"
android:inputType="textPersonName"
android:singleLine="true"
android:text="Cookies don't"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtCounterName" />
<TextView
android:id="@+id/txtCounterEntryValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="20dp"
android:fontFamily="@font/allerta"
android:text="@string/entryNum"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/inpuTextNewCounterName" />
<EditText
android:id="@+id/numEntryNum"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="10dp"
android:layout_marginEnd="10dp"
android:ems="10"
android:hint="@string/number"
android:inputType="number"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtCounterEntryValue" />
</androidx.constraintlayout.widget.ConstraintLayout>
这是我用来评估表单的代码：
public class AddCounter extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_counter);
//Setting save button action listener
findViewById(R.id.btnSaveCounter).setOnClickListener(new ActionListeners().getSaveCounter());
}
public static void evaluateCounter(View view) throws NoNameException, NumberOutOfBoundException {
//Getting context
Context context = view.getContext();
//Counter Name
View viewEdit = View.inflate(context, R.layout.activity_add_counter, null);
EditText counterName = viewEdit.findViewById(R.id.inpuTextNewCounterName);
System.out.println("Cookies fly like:" + counterName.getText().toString() + "!");
//Input to string
String name = counterName.getText().toString();
//If no name was specified exception thrown
if (name.equals("")) {
throw new NoNameException(context.getString(R.string.noNameSpecified));
}
//get entry number
EditText numberView = View.inflate(context, R.layout.activity_add_counter, null).findViewById(R.id.numEntryNum);
//Number
int number = 0;
//If nothing specified
if (!(numberView.getText().toString().equals(""))) {
if (Integer.parseInt(numberView.getText().toString()) > 1000 || Integer.parseInt(numberView.getText().toString()) < -1000) {
throw new NumberOutOfBoundException(context.getString(R.string.numOutOfBound));
}
}
//New Counter Object
Counter counter = new Counter(number, name);
//storing counter
ToJson toJson = new ToJson();
toJson.storeCounter(counter, context);
}
}
正如您在此处看到的，此 if 陈述始终为真。
看看，文字长什么样，我打印了一段文字：
System.out.println("Cookies fly like:" + counterName.getText().toString() + "!");
我确实在输入中输入了一个词，但输出为空，如您所见：
I/System.out: Cookies fly like:!
这是我的 ActionListener：¨
public class ActionListeners {
private OnClickListener saveCounter = v -> {
try {
//Evaluate Counter
AddCounter.evaluateCounter(v);
} catch (NoNameException e) {
//If no name was specified
CounterMethods.makeSnackbar(v, Snackbar.LENGTH_SHORT, HapticFeedbackConstants.REJECT, v.getContext().getString(R.string.noNameSpecified));
e.printStackTrace();
} catch (NumberOutOfBoundException e) {
//If entry is higher or lower than available
CounterMethods.makeSnackbar(v, Snackbar.LENGTH_SHORT, HapticFeedbackConstants.REJECT, v.getContext().getString(R.string.numOutOfBound));
}
};
public OnClickListener getSaveCounter() {
return this.saveCounter;
}
}
如您所见，我确实在 xml 文件中将文本设置为“Cookies can't fly”，但是，如果我在应用程序中将文本更改为不同的内容，输出是我在 XML.
中设置的文本I/System.out: Cookies fly like:Cookies can't fly!
有什么问题？
试试这个
public class AddCounter extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_counter);
//declare Counter Name EditText
EditText counterName = findViewById(R.id.inpuTextNewCounterName);
//declare btnSaveCounter Button
Button btnSaveCounter = findViewById(R.id.btnSaveCounter);
//declare get entry number EditText
EditText numberView = findViewById(R.id.numEntryNum);
//btnSaveCounter setOnClickListener
btnSaveCounter.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
//Input to string
String name = counterName.getText().toString();
System.out.println("Cookies fly like:" + name + "!");
//If no name was specified
if (name.equals("")){
System.out.println( "getString(R.string.noNameSpecified)" );//todo
}
//If nothing specified
String numbrv = numberView.getText().toString();
if (!(numbrv.equals(""))){
if (Integer.parseInt(numbrv) > 1000 || Integer.parseInt(numbrv) < -1000) {
System.out.println( "getString(R.string.numOutOfBound)" );//todo
}
}
//Number
int number = 0;
//New Counter Object
Counter counter = new Counter(number, name);
//storing counter
ToJson toJson = new ToJson();
toJson.storeCounter(counter, context);
} });
}
}