Android onFocusChangeListener不工作
我为android计算器应用程序编写了一些代码。我想要的是：- 如果Android onFocusChangeListener不工作,android,Android,我为android计算器应用程序编写了一些代码。我想要的是：- 如果EditText字段失去焦点，所有输出字段都应该像在excel工作表中一样得到更新，如果我们更新单元格中的任何值，它会更新工作表中所有连接的值。 但是我的代码没有做任何事情。如果我不使用trycatch块，则应用程序正在崩溃。它显示代码中有一个错误，但我无法跟踪它 请帮助，如果有更好的方法来做这个货币面额合计计算器 Java代码是：- package mahalaxmi.mahalaxmi; import android.s
EditTexttrycatchpackage mahalaxmi.mahalaxmi;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
/**
* Created by SIV on 10-03-2018.
*/
public class Fragment_four extends Fragment {
private static EditText notes2000, notes500, notes200, notes100, notes50, notes20, notes10, notes5, notes2, notes1;
private static TextView value2000, value500, value200, value100, value50, value20, value10, value5, value2, value1;
private static TextView errorText41, quantityTotal, valueTotal;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layout, container, false);
notes2000 = (EditText) view.findViewById(R.id.qty2000);
notes500 = (EditText) view.findViewById(R.id.qty500);
notes200 = (EditText) view.findViewById(R.id.qty200);
notes100 = (EditText) view.findViewById(R.id.qty100);
notes50 = (EditText) view.findViewById(R.id.qty50);
notes20 = (EditText) view.findViewById(R.id.qty20);
notes10 = (EditText) view.findViewById(R.id.qty10);
notes5 = (EditText) view.findViewById(R.id.qty5);
notes2 = (EditText) view.findViewById(R.id.qty2);
notes1 = (EditText) view.findViewById(R.id.qty1);
value2000 = (TextView) view.findViewById(R.id.result2000);
value500 = (TextView) view.findViewById(R.id.result500);
value200 = (TextView) view.findViewById(R.id.result200);
value100 = (TextView) view.findViewById(R.id.result100);
value50 = (TextView) view.findViewById(R.id.result50);
value20 = (TextView) view.findViewById(R.id.result20);
value10 = (TextView) view.findViewById(R.id.result10);
value5 = (TextView) view.findViewById(R.id.result5);
value2 = (TextView) view.findViewById(R.id.result2);
value1 = (TextView) view.findViewById(R.id.result1);
quantityTotal = (TextView) view.findViewById(R.id.qtyTotal);
valueTotal = (TextView) view.findViewById(R.id.resultTotal);
errorText41 = (TextView) view.findViewById(R.id.errorText4);
View.OnFocusChangeListener listener;
listener = new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
short val2000=0, val500=0, val200=0, val100=0, val50=0, val20=0, val10=0, val5=0, val2=0, val1=0;
int totalQty, totalValue;
int tval2000=0, tval500=0, tval200=0, tval100=0, tval50=0, tval20=0, tval10=0, tval5=0, tval2=0, tval1=0;
if(!hasFocus){
try {
//extracting the entered values from EditText field
val2000 = Short.parseShort(value2000.getText().toString());
val500 = Short.parseShort(value500.getText().toString());
val200 = Short.parseShort(value200.getText().toString());
val100 = Short.parseShort(value100.getText().toString());
val50 = Short.parseShort(value50.getText().toString());
val20 = Short.parseShort(value20.getText().toString());
val10 = Short.parseShort(value10.getText().toString());
val5 = Short.parseShort(value5.getText().toString());
val2 = Short.parseShort(value2.getText().toString());
val1 = Short.parseShort(value1.getText().toString());
//calculating the output values
tval2000 = value(notes2000, val2000);
tval500 = value(notes500, val500);
tval200 = value(notes200, val200);
tval100 = value(notes100, val100);
tval50 = value(notes50, val50);
tval20 = value(notes20, val20);
tval10 = value(notes10, val10);
tval5 = value(notes5, val5);
tval2 = value(notes2, val2);
tval1 = value(notes1, val1);
//setting the output value
value2000.setText(tval2000 + "");
value500.setText(tval500 + "");
value200.setText(tval200 + "");
value100.setText(tval100 + "");
value50.setText(tval50 + "");
value20.setText(tval20 + "");
value10.setText(tval10 + "");
value5.setText(tval5 + "");
value2.setText(tval2 + "");
value1.setText(tval1 + "");
totalQty = val2000 + val500 + val200 + val100 + val50 + val20 + val10 + val5 + val2 + val1;
totalValue = tval2000 + tval500 + tval200 + tval100 + tval50 + tval20 + tval10 + tval5 + tval2 + tval1;
quantityTotal.setText(totalQty + "");
valueTotal.setText(totalValue + "");
}
catch (Exception e){};
}
}
};
notes2000.setOnFocusChangeListener(listener);
notes500.setOnFocusChangeListener(listener);
notes200.setOnFocusChangeListener(listener);
notes100.setOnFocusChangeListener(listener);
notes50.setOnFocusChangeListener(listener);
notes20.setOnFocusChangeListener(listener);
notes10.setOnFocusChangeListener(listener);
notes5.setOnFocusChangeListener(listener);
notes2.setOnFocusChangeListener(listener);
notes1.setOnFocusChangeListener(listener);
return view;
}
private void clearQty(EditText e) {
e.setText("");
}
private int value(int e, int s) {
return e * s;
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteY="81dp">
<TableLayout
android:layout_width="351dp"
android:layout_height="506dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TableRow
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:id="@+id/lableDenom"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:background="@color/colorPrimaryDark"
android:text="Denom"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
<TextView
android:id="@+id/lableQty"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:background="@color/colorPrimaryDark"
android:paddingLeft="10dp"
android:text="Qty"
android:textAllCaps="false"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold|italic"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
<TextView
android:id="@+id/lableValue"
android:layout_width="184dp"
android:layout_height="35dp"
android:background="@color/colorPrimaryDark"
android:text="Value"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:id="@+id/lable2000"
android:layout_width="67dp"
android:layout_height="35dp"
android:background="@color/Rs_2000"
android:paddingLeft="5dp"
android:text="2000"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
<EditText
android:id="@+id/qty2000"
android:layout_width="100dp"
android:layout_height="40dp"
android:ems="10"
android:inputType="number"
android:maxLength="4"
android:textColor="@android:color/holo_blue_dark"
android:textSize="25dp"
android:textStyle="bold" />
<TextView
android:id="@+id/result2000"
android:layout_width="184dp"
android:layout_height="35dp"
android:background="@color/Rs_2000"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
</TableRow>
....
and so on
....
<TableRow
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:id="@+id/lableTotal"
android:layout_width="67dp"
android:layout_height="35dp"
android:layout_marginTop="5dp"
android:background="@color/colorPrimaryDark"
android:paddingLeft="5dp"
android:text="Total"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
<TextView
android:id="@+id/qtyTotal"
android:layout_width="100dp"
android:layout_height="35dp"
android:layout_marginTop="5dp"
android:background="@color/colorPrimaryDark"
android:ems="10"
android:inputType="number"
android:maxLength="4"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold" />
<TextView
android:id="@+id/resultTotal"
android:layout_width="184dp"
android:layout_height="35dp"
android:layout_marginTop="5dp"
android:background="@color/colorPrimaryDark"
android:textColor="@android:color/background_light"
android:textSize="25dp"
android:textStyle="bold"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="14dp" />
</TableRow>
</TableLayout>
<TextView
android:id="@+id/errorText4"
android:layout_width="300dp"
android:layout_height="wrap_content"
tools:layout_editor_absoluteX="42dp"
tools:layout_editor_absoluteY="460dp" />
</android.support.constraint.ConstraintLayout>
....
等等
....
int val2000=0, val500=0, val200=0, val100=0, val50=0, val20=0, val10=0, val5=0, val2=0, val1=0;
int totalQty, totalValue;
int tval2000=0, tval500=0, tval200=0, tval100=0, tval50=0, tval20=0, tval10=0, tval5=0, tval2=0,tval1=0;
View.OnFocusChangeListener listener;
listener = new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus){
try {
switch(v.getId()) {
case R.id.qty2000:
val2000 = Integer.parseInt(notes2000.getText().toString());
tval2000 = value(2000, val2000);
value2000.setText(tval2000 + "");
break;
case R.id.qty500 :
val500 = Integer.parseInt(notes500.getText().toString());;
tval500 = value(500, val500);
value500.setText(tval500 + "");
break;
case R.id.qty200:
val200 = Integer.parseInt(notes200.getText().toString());
tval200 = value(200, val200);
value200.setText(tval200 + "");
break;
case R.id.qty100:
val100 = Integer.parseInt(notes100.getText().toString());
tval100 = value(100, val100);
value100.setText(tval100 + "");
break;
case R.id.qty50:
val50 = Integer.parseInt(notes50.getText().toString());
tval50 = value(50, val50);
value50.setText(tval50 + "");
break;
case R.id.qty20:
val20 = Integer.parseInt(notes20.getText().toString());
tval20 = value(20, val20);
value20.setText(tval20 + "");
break;
case R.id.qty10:
val2000 = Integer.parseInt(notes10.getText().toString());
tval10 = value(10, val10);
value10.setText(tval10 + "");
break;
case R.id.qty5:
val5 = Integer.parseInt(notes5.getText().toString());
tval5 = value(5, val5);
value5.setText(tval5 + "");
break;
case R.id.qty2:
val2 = Integer.parseInt(notes2.getText().toString());
tval2 = value(2, val2);
value2.setText(tval2 + "");
break;
case R.id.qty1 :
val1 = Integer.parseInt(notes1.getText().toString());
tval1 = value(1, val1);
value1.setText(tval1 + "");
break;
default:
//do the default behaviour.
break;
}
}
catch (Exception e){
e.printStackTrace();
}
finally {
totalQty = val2000 + val500 + val200 + val100 + val50 + val20 + val10 + val5 + val2 + val1;
totalValue = tval2000 + tval500 + tval200 + tval100 + tval50 + tval20 + tval10 + tval5 + tval2 + tval1;
quantityTotal.setText(totalQty + "");
valueTotal.setText(totalValue + "");
}
}
}
};
请为每个视图创建单独的侦听器，或为每个视图编写开关大小写 在听者内部
switch(view.getId){
case: R.id.your_view_id:
break;
}
使用e.printstacktrace（）打印错误堆栈跟踪，而不是空的catch块写入，这样您就可以了解此错误。如果您可以更新包含此信息的帖子，我们也可以帮助您解决此问题。最初我开始单独编写，但我无法从其他EditText字段中选择值，如果任何EditText字段失去焦点，则更新所有总计字段和总计字段。更新了答案。请检查并让我知道这是否解决了问题。是的，它正在工作，但一个问题是total字段显示的EditText值正在失去焦点，相应的输出值，而不是所有字段的总和。请根据您的第一条评论检查更新的答案。我已经把所有的局部函数变量移到了类变量中。这将用屏幕上可见的值更新总值。听起来不错。祝你一切顺利！