Question

如果我想将2个编辑文字作为文字观看，我该怎么说呢？两者都有联系。

如果是edittext 1 + edittext 2 = .... 含义如果我一起添加edittext 1和edittext 2，结果将显示为textviewer

    import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

    Button saveButton = null;
    EditText dateEdit; 
    EditText priceEdit;
    EditText pumpEdit;
    TextView costView;
    EditText odometerEdit;
    TextView fconView;
     TextWatcher textWatcher;
     String priceEditStr ="",pumpEditStr="";
int result;



    public boolean isNumeric(String str)
    {
        return str.matches("-?\\d+(\\.\\d+)?"); 
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);




        setContentView(R.layout.activity_main);
        Bundle bundle = getIntent().getExtras();
        float price = Float.parseFloat(bundle.getString("priceEdit"));
        float pump = Float.parseFloat(bundle.getString("pumpEdit"));

        costView = (TextView)findViewById(R.id.tcost);
        dateEdit = (EditText)findViewById(R.id.date);
        priceEdit = (EditText)findViewById(R.id.fuelprice);
        pumpEdit = (EditText)findViewById(R.id.fuelpump);

           priceEdit.addTextChangedListener(new 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) {

               }

               @Override
               public void afterTextChanged(Editable editable) {
                  //here, after we introduced something in the EditText we get the string from it
                   if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !priceEdit.getText().toString().trim().equalsIgnoreCase(null))
                        priceEditStr = priceEdit.getText().toString().trim();
                   if(!pumpEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(null))
                        pumpEditStr = pumpEdit.getText().toString().trim();

                  if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                  {
                    result = Integer.parseInt(priceEditStr) * Integer.parseInt(pumpEditStr);              
                    costView.setText(" "+result);
                  }

               }
           });

           pumpEdit.addTextChangedListener(new 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) {

               }

               @Override
               public void afterTextChanged(Editable editable) {
                  //here, after we introduced something in the EditText we get the string from it
                   if(!priceEdit.getText().toString().trim().equalsIgnoreCase(""))
                        priceEditStr = priceEdit.getText().toString().trim();
                   if(!pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                        pumpEditStr = pumpEdit.getText().toString().trim();


                   if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                      {
                        result = Integer.parseInt(priceEditStr) * Integer.parseInt(pumpEditStr);              
                        costView.setText(" "+result);
                      }

               }
           });



        saveButton = (Button) findViewById(R.id.saveBTN);
        saveButton.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                DBAdapter dbAdaptor = new DBAdapter(getApplicationContext());
                try
                {
                    dbAdaptor.open();
                    String date = dateEdit.getText().toString();
                    String price = priceEdit.getText().toString();
                    String pump = pumpEdit.getText().toString();
                     String cost = Float.toString(a);
                    String odometer = odometerEdit.getText().toString();
                    String fcon = fconView.getText().toString();
                    dbAdaptor.insertLog(date, price, pump, cost, odometer, fcon);

                }
                catch(Exception e){
                    Log.d("Fuel Log", e.getMessage());
                }
                finally
                {
                    if(dbAdaptor != null)
                        dbAdaptor.close();
                }
            }
        });

    }//oncreate


}//main

Answer 1

解决::

    import android.os.Bundle;
    import android.app.Activity;
    import android.text.Editable;
    import android.text.TextWatcher;
    import android.widget.EditText;
    import android.widget.TextView; 

     public class EditResult extends Activity {

        //TextWatcher textWatcher; No need 
        EditText priceEdit,pumpEdit;
        TextView costView;
        String priceEditStr="",pumpEditStr="";
         int result;
        @Override
        protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.edit_sample);

             priceEdit=(EditText) findViewById(R.id.editText1);
             pumpEdit=(EditText) findViewById(R.id.editText2);
             costView =(TextView) findViewById(R.id.textView1);


            priceEdit.addTextChangedListener(new 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) {

                }

                @Override
                public void afterTextChanged(Editable editable) {
                   //here, after we introduced something in the EditText we get the string from it
                    if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !priceEdit.getText().toString().trim().equalsIgnoreCase(null))
                         priceEditStr = priceEdit.getText().toString().trim();
                    if(!pumpEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(null))
                         pumpEditStr = pumpEdit.getText().toString().trim();

                   if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                   {
                     result = Integer.parseInt(priceEditStr) * Integer.parseInt(pumpEditStr);              
                     costView.setText(" "+result);
                   }

                }
            });

            pumpEdit.addTextChangedListener(new 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) {

                }

                @Override
                public void afterTextChanged(Editable editable) {
                   //here, after we introduced something in the EditText we get the string from it
                    if(!priceEdit.getText().toString().trim().equalsIgnoreCase(""))
                         priceEditStr = priceEdit.getText().toString().trim();
                    if(!pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                         pumpEditStr = pumpEdit.getText().toString().trim();


                    if(!priceEdit.getText().toString().trim().equalsIgnoreCase("") && !pumpEdit.getText().toString().trim().equalsIgnoreCase(""))
                       {
                         result = Integer.parseInt(priceEditStr) * Integer.parseInt(pumpEditStr);              
                         costView.setText(" "+result);
                       }

                }
            });
        }

    }

向我提供反馈

Answer 2

您必须在每个编辑文字视图的TextWatcher

中执行以下操作

public void afterTextChanged(Editable s) {
                txtViewTotalPrice.setText(String.valueOf(Double.parseDouble(s.toString()) * Double.parseDouble(edittext_2.getText().toString())));
}

Answer 3

像这样创建一个textwatcher：

TextWatcher tw=new TextWatcher(){
            priceEdit.addTextChangedListener(new TextWatcher(){
            public void afterTextChanged(Editable s)
            {

            }


            public void beforeTextChanged(CharSequence s, int start, int count, int after)
            {

            }

            public void onTextChanged(CharSequence s, int start, int before, int count)
            {
                TextView costView = (TextView)findViewById(R.id.tcost);
                costView.setText(String.valueOf(Double.parseDouble(pumpEdit.getText().toString()) * Double.parseDouble(priceEdit.getText().toString())));


            }
        }

并将其添加到两个编辑文本中：

pumpEdit.addTextChangedListener(tw);
priceEdit.addTextChangedListener(tw);

如何将2个编辑文本作为textwatch

3 个答案: