我需要选择一个按钮，＆＃39; H＆＃39;它表示周期表中的原子元素，根据需要多次，并且必须将总重量数加起来，并将其显示在mw_results中。
到目前为止，我只能将它显示两次，因为我已经对它进行了硬编码。
任何想法如何我可以继续添加数字，而无需硬编码..？
感谢！
以下是代码：
public void Chem()
{
final Dialog g = new Dialog(Sol.this);
g.setContentView(R.layout.table);
final float[] MoWeight = {0};
mw_result = (TextView)findViewById(R.id.editText);
mf_result = (EditText)findViewById(R.id.editText4);
Chemname = "";
final String space = " ";
final int number = 0;
Button H = (Button) g.findViewById(R.id.H);
Button C = (Button) g.findViewById(R.id.C);
H.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.H:
mf_result.append(String.valueOf("H"));
mw_result.setText(String.valueOf(123));
float MoWeight = Float.valueOf(mw_result.getText().toString());
MoWeight = Float.valueOf(mw_result.getText().toString()) + MoWeight;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
mw_result = (TextView)findViewById(R.id.editText);
g.dismiss();
}
}
});
C.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.C:
mf_result.append(String.valueOf("C"));
mw_result.setText(String.valueOf(456));
float MoWeight = Float.valueOf(mw_result.getText().toString());
MoWeight = Float.valueOf(mw_result.getText().toString()) + MoWeight;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
mw_result = (TextView)findViewById(R.id.editText);
g.dismiss();
}
}
});
g.show();
}
答案 0 :(得分：0)
试试这个：
public void Chem()
{
final Dialog g = new Dialog(Sol.this);
g.setContentView(R.layout.table);
final float[] MoWeight = {0};
mw_result = (TextView)findViewById(R.id.editText);
mf_result = (EditText)findViewById(R.id.editText4);
Chemname = "";
final String space = " ";
final int number = 0;
Button H = (Button) g.findViewById(R.id.H);
Button C = (Button) g.findViewById(R.id.C);
mw_result.setTag(1);//1 in case you're updating 123 values
mw_result.setTag(2);//2 in case you're updating 456 values
H.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
int key = Integer.parseInt(mw_result.getTag().toString());
if(key==2){
mw_result.setTag(1);//1 in case you're updating 123 values
mf_result.append(String.valueOf("H"));
mw_result.setText(String.valueOf(123));
g.dismiss();
}
else{
float MoWeight = Float.valueOf(mw_result.getText().toString());
MoWeight = Float.valueOf(mw_result.getText().toString()) + 1;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
}
}
});
C.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
int key = Integer.parseInt(mw_result.getTag().toString());
if(key==1){
mw_result.setTag(2);//1 in case you're updating 123 values
mf_result.append(String.valueOf("C"));
mw_result.setText(String.valueOf(456));
g.dismiss();
}
else{
float MoWeight = Float.valueOf(mw_result.getText().toString());
MoWeight = Float.valueOf(mw_result.getText().toString()) + 1;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
}
}
});
g.show();
}
答案 1 :(得分：0)
您似乎在每次点击时将文本视图分别重置为123和456.
很难确切地看到你想要的东西，但这可能会帮助你走上正轨：
public void Chem()
{
final Dialog g = new Dialog(Sol.this);
g.setContentView(R.layout.table);
final float[] MoWeightArray = {0}; //rename this for readability -- is this used at all?
mw_result = (TextView)findViewById(R.id.editText);
mf_result = (EditText)findViewById(R.id.editText4);
Chemname = "";
final String space = " ";
final int number = 0;
Button H = (Button) g.findViewById(R.id.H);
Button C = (Button) g.findViewById(R.id.C);
H.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.H:
String sMW= mw_result.getText().toString();
mf_result.append(String.valueOf("H"));
if (sMW.matches("")) {
mw_result.setText(String.valueOf(123));
}
else{
float MoWeight = Float.valueOf(sMW);
MoWeight += 123;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
//mw_result = (TextView)findViewById(R.id.editText); no need for this
g.dismiss();
}
}
}
});
C.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.C:
String sMW= mw_result.getText().toString();
mf_result.append(String.valueOf("C"));
if (sMW.matches("")) {
mw_result.setText(String.valueOf(456));
}
else{
float MoWeight = Float.valueOf(sMW);
MoWeight += 456;
String mw_res=Float.toString(MoWeight);
mw_result.setText(mw_res);
//mw_result = (TextView)findViewById(R.id.editText); No need for this
g.dismiss();
}
}
}
});
g.show();
}