使用具有多个用户输入值的Android TextWatcher并更新这些值
我也是新来的。我尝试开发一个android应用程序来获取用户输入项的总量。这是我的申请简图 用户必须输入第一行Col1和COL2。但第一行Col3可以输入也可以不输入。在Sub 1文本视图中,应显示第一行的总值。此值也应显示在结果文本视图中。同样,若用户将数据插入第二行,则必须在Col1和Col2下输入到。如果用户愿意,可以在第3列下输入值。第二行总值应显示在Sub 2文本视图中。如果用户在第二行输入值,则结果textview应自动更新为Sub 1和Sub 2 textview的总值。我试着这样做,但我找不到正确的方法。如果有人帮我解决这个问题,我真的很感激。 这是java类使用具有多个用户输入值的Android TextWatcher并更新这些值,android,user-input,android-textwatcher,Android,User Input,Android Textwatcher,我也是新来的。我尝试开发一个android应用程序来获取用户输入项的总量。这是我的申请简图 用户必须输入第一行Col1和COL2。但第一行Col3可以输入也可以不输入。在Sub 1文本视图中,应显示第一行的总值。此值也应显示在结果文本视图中。同样,若用户将数据插入第二行,则必须在Col1和Col2下输入到。如果用户愿意,可以在第3列下输入值。第二行总值应显示在Sub 2文本视图中。如果用户在第二行输入值,则结果textview应自动更新为Sub 1和Sub 2 textview的总值。我试着这样
public class AddTwo extends AppCompatActivity {
EditText edit1, edit2, edit3;
EditText edit4, edit5, edit6;
TextView textViewSub1, textViewSub2, textViewResult;
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_add_two);
/*First row variables*/
edit1 = (EditText) findViewById(R.id.editText1);
edit2 = (EditText) findViewById(R.id.editText2);
edit3 = (EditText) findViewById(R.id.editText3);
textViewSub1 = (TextView) findViewById(R.id.TextViewsub1);
/*Second row variables*/
edit4 = (EditText) findViewById(R.id.editText5);
edit5 = (EditText) findViewById(R.id.editText6);
edit6 = (EditText) findViewById(R.id.editText7);
textViewSub2 = (TextView) findViewById(R.id.TextViewsub2);
/*Final Total TextView variable*/
textViewResult = (TextView) findViewById(R.id.textView_result);
//use TextWatcher for edit1 in First Row Col1
edit1.addTextChangedListener(new TextWatcher() {
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
//textViewResult.setText(addNumbers());
}
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
//use TextWatcher for first First Row Col2
edit2.addTextChangedListener(new TextWatcher() {
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
//textViewResult.setText(addNumbers());
}
});
//use TextWatcher for first First Row Col3
edit3.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable editable) {
textViewResult.setText(addNumbers());
}
});
}
//Define method addString()
private String addNumbers() {
//declaring variables
int number1, number2;
double num1, num2;
double d1, d2;
double da1, da2;
Double orderTotal1 = null, orderTotal2 = null;
Double ordTot1 = null, ordTot2 = null;
DecimalFormat df = new DecimalFormat("0.00##");
//For First Row
/*if only the first and second edittext fields in First Row is filled*/
if ((edit1.getText().toString() != "" && edit1.getText().length() > 0) && (edit2.getText().toString() != "" && edit2.getText().length() > 0)) {
num1 = Double.parseDouble((edit1.getText().toString()));
number1 = Integer.parseInt(edit2.getText().toString());
ordTot1 = num1 * number1;
textViewSub1.setText(df.format(ordTot1));
/*else if the first,secondn third (all) edittext fields in First Row is filled*/
} else if ((edit1.getText().toString() != "" && edit1.getText().length() > 0) && (edit2.getText().toString() != "" && edit2.getText().length() > 0) && (edit3.getText().toString() != "" && edit3.getText().length() > 0)) {
num1 = Double.parseDouble((edit1.getText().toString()));
number1 = Integer.parseInt(edit2.getText().toString());
d1 = Double.parseDouble(edit3.getText().toString());
da1 = 100 - d1;
orderTotal1 = ((da1 * number1) * num1) / 100;
textViewSub1.setText(df.format(orderTotal1));
} else {
number1 = (int) 0.00;
num1 = 0.00;
da1 = 0.00;
}
//For the Second Row
/*if only the first and second edittext fields in Second Row is filled*/
if ((edit4.getText().toString() != "" && edit4.getText().length() > 0) && (edit5.getText().toString() != "" && edit5.getText().length() > 0)) {
num2 = Double.parseDouble((edit4.getText().toString()));
number2 = Integer.parseInt(edit5.getText().toString());
ordTot2 = num2 * number2;
textViewSub2.setText(df.format(ordTot2));
/*else if the first,secondn third (all) edittext fields in Second Row is filled*/
} else if ((edit4.getText().toString() != "" && edit4.getText().length() > 0) && (edit5.getText().toString() != "" && edit5.getText().length() > 0) && (edit6.getText().toString() != "" && edit6.getText().length() > 0)) {
num2 = Double.parseDouble((edit1.getText().toString()));
number2 = Integer.parseInt(edit2.getText().toString());
d2 = Double.parseDouble(edit3.getText().toString());
da2 = 100 - d2;
orderTotal2 = ((da2 * number2) * num2) / 100;
textViewSub2.setText(df.format(orderTotal2));
} else {
number2 = (int) 0.00;
num2 = 0.00;
da2 = 0.00;
}
//return statement
return df.format((orderTotal1) + (orderTotal2));
}
}
希望这有帮助
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_add_two);
/*First row variables*/
edit1 = (EditText) findViewById(R.id.editText1);
edit2 = (EditText) findViewById(R.id.editText2);
edit3 = (EditText) findViewById(R.id.editText3);
textViewSub1 = (TextView) findViewById(R.id.TextViewsub1);
/*Second row variables*/
edit4 = (EditText) findViewById(R.id.editText5);
edit5 = (EditText) findViewById(R.id.editText6);
edit6 = (EditText) findViewById(R.id.editText7);
textViewSub2 = (TextView) findViewById(R.id.TextViewsub2);
/*Final Total TextView variable*/
textViewResult = (TextView) findViewById(R.id.textView_result);
edit1.addTextChangedListener(new LashCustomTextWatcher());
edit2.addTextChangedListener(new LashCustomTextWatcher());
edit3.addTextChangedListener(new LashCustomTextWatcher());
edit4.addTextChangedListener(new LashCustomTextWatcher());
edit5.addTextChangedListener(new LashCustomTextWatcher());
edit6.addTextChangedListener(new LashCustomTextWatcher());
}
public class LashCustomTextWatcher implements TextWatcher{
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
textViewResult.setText(lashCalculate());
}
@Override
public void afterTextChanged(Editable editable) {
}
}
public String lashCalculate(){
//declaring variables
double row1_value = 0;
double row2_value = 0;
DecimalFormat df = new DecimalFormat("0.00##");
//calculate first row
if (!edit1.getText().toString().equals("") && !edit2.getText().toString().equals("")){
double num1 = Double.parseDouble((edit1.getText().toString()));
double num2 = Double.parseDouble((edit2.getText().toString()));
row1_value = num1*num2;
double num3 = 0;
if (!edit3.getText().toString().equals("")){
num3 = Double.parseDouble((edit3.getText().toString()));
row1_value = (((100 - num3) * num2) * num1)/100;
}
textViewSub1.setText(df.format(row1_value));
}
//calculate second row
if (!edit4.getText().toString().equals("") && !edit5.getText().toString().equals("")){
double num4 = Double.parseDouble((edit4.getText().toString()));
double num5 = Double.parseDouble((edit5.getText().toString()));
row2_value = num4*num5;
double num6 = 0;
if (!edit6.getText().toString().equals("")){
num6 = Double.parseDouble((edit6.getText().toString()));
row2_value = (((100 - num6) * num5) * num4)/100;
}
textViewSub2.setText(df.format(row2_value));
}
return df.format(row1_value + row2_value);
}
希望这有帮助
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_add_two);
/*First row variables*/
edit1 = (EditText) findViewById(R.id.editText1);
edit2 = (EditText) findViewById(R.id.editText2);
edit3 = (EditText) findViewById(R.id.editText3);
textViewSub1 = (TextView) findViewById(R.id.TextViewsub1);
/*Second row variables*/
edit4 = (EditText) findViewById(R.id.editText5);
edit5 = (EditText) findViewById(R.id.editText6);
edit6 = (EditText) findViewById(R.id.editText7);
textViewSub2 = (TextView) findViewById(R.id.TextViewsub2);
/*Final Total TextView variable*/
textViewResult = (TextView) findViewById(R.id.textView_result);
edit1.addTextChangedListener(new LashCustomTextWatcher());
edit2.addTextChangedListener(new LashCustomTextWatcher());
edit3.addTextChangedListener(new LashCustomTextWatcher());
edit4.addTextChangedListener(new LashCustomTextWatcher());
edit5.addTextChangedListener(new LashCustomTextWatcher());
edit6.addTextChangedListener(new LashCustomTextWatcher());
}
public class LashCustomTextWatcher implements TextWatcher{
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
textViewResult.setText(lashCalculate());
}
@Override
public void afterTextChanged(Editable editable) {
}
}
public String lashCalculate(){
//declaring variables
double row1_value = 0;
double row2_value = 0;
DecimalFormat df = new DecimalFormat("0.00##");
//calculate first row
if (!edit1.getText().toString().equals("") && !edit2.getText().toString().equals("")){
double num1 = Double.parseDouble((edit1.getText().toString()));
double num2 = Double.parseDouble((edit2.getText().toString()));
row1_value = num1*num2;
double num3 = 0;
if (!edit3.getText().toString().equals("")){
num3 = Double.parseDouble((edit3.getText().toString()));
row1_value = (((100 - num3) * num2) * num1)/100;
}
textViewSub1.setText(df.format(row1_value));
}
//calculate second row
if (!edit4.getText().toString().equals("") && !edit5.getText().toString().equals("")){
double num4 = Double.parseDouble((edit4.getText().toString()));
double num5 = Double.parseDouble((edit5.getText().toString()));
row2_value = num4*num5;
double num6 = 0;
if (!edit6.getText().toString().equals("")){
num6 = Double.parseDouble((edit6.getText().toString()));
row2_value = (((100 - num6) * num5) * num4)/100;
}
textViewSub2.setText(df.format(row2_value));
}
return df.format(row1_value + row2_value);
}
这是一个文本观察者Metod
....
public EditText edit1 ,edit2 ,edit3;
public void onCreate(Bundle savedInstanceState) {
.....
edit1 = (EditText) findViewById(R.id.editText1);
edit2 = (EditText) findViewById(R.id.editText2);
edit3 = (EditText) findViewById(R.id.editText3);
edit1.addTextChangedListener(textWatcher());
edit2.addTextChangedListener(textWatcher());
edit3.addTextChangedListener(textWatcher());
......
public TextWatcher textWatcher() {
return new TextWatcher() {
CountDownTimer timer = null;
@Override
public void afterTextChanged(Editable s) {
//do some thigs
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
//do some thigs
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//do some thigs
}
};
}
这是一个文本观察者Metod
....
public EditText edit1 ,edit2 ,edit3;
public void onCreate(Bundle savedInstanceState) {
.....
edit1 = (EditText) findViewById(R.id.editText1);
edit2 = (EditText) findViewById(R.id.editText2);
edit3 = (EditText) findViewById(R.id.editText3);
edit1.addTextChangedListener(textWatcher());
edit2.addTextChangedListener(textWatcher());
edit3.addTextChangedListener(textWatcher());
......
public TextWatcher textWatcher() {
return new TextWatcher() {
CountDownTimer timer = null;
@Override
public void afterTextChanged(Editable s) {
//do some thigs
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
//do some thigs
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//do some thigs
}
};
}
您在计算方面遇到了问题,还是找到了更好的方法?@TruongHieu,我更改了代码并尝试了一下,但当第一行只填写了第1列和第2列时,我可以得到答案。在那之后它就不起作用了。如果有人能帮助我更好地完成这项任务,我真的很感激。你在计算方面遇到了问题,或者找到了更好的方法?@TruongHieu,我更改了代码并尝试了一下,但当第一行只填写了第1列和第2列时,我就能得到答案。在那之后它就不起作用了。我真的很感谢如果有人能帮助我以更好的方式做这件事@trunghieu,谢谢你,因为你正试图帮助我。但是,当我输入值Sub 1、Sub 2和Result textView字段时,不会使用第一行和第二行@TruongHieu的计算值进行更新,很抱歉,我忘记调用该方法,这就是为什么值不能更新view@Lash你能解决你的问题吗?如果我的答案对你有帮助,请按答案评分并打上标记,如果可以@trunghieu,你救了我:),非常感谢,我接受你的答案,但由于我没有足够的评分,我无法投票支持你的答案。再次感谢@TruongHieu,谢谢你在帮助我。但是,当我输入值Sub 1、Sub 2和Result textView字段时,不会使用第一行和第二行@TruongHieu的计算值进行更新,很抱歉,我忘记调用该方法,这就是为什么值不能更新view@Lash你能解决你的问题吗?如果我的答案对你有帮助,请按答案评分并打上标记,如果可以@trunghieu,你救了我:),非常感谢,我接受你的答案,但由于我没有足够的评分,我无法投票支持你的答案。再次感谢