how to put values of edit texts in the dialogue bo

问题:

I want to give the output, which was entered by the user in EditText, in a detailed manner in a separate dialog box, by using the values of those entered values in the edittext. Any help will be appreciated.

Here is the code:

EditText editText1,editText2,editText3;
Button btn,btn2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btn = (Button) findViewById(R.id.btn);
    btn2 = (Button) findViewById(R.id.btn2);

    editText1 = (EditText) findViewById(R.id.editText2);
    editText2 = (EditText) findViewById(R.id.editText3);
    editText3 = (EditText) findViewById(R.id.editText4);

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            calculate();
        }
    });

    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MainActivity.this);

            String s = " (Result) ";
            alertDialogBuilder.setTitle("Detailed Output is");
            alertDialogBuilder.setCancelable(false);
            alertDialogBuilder.setMessage("(The code should be like as follows)\n\n"+"sum of entered number is:"+s+"\n"+"multiply of entered number is:"+s+"\n"+"subtraction of entered number is:"+s)

                    .setNeutralButton("Ok", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.cancel();
                        }
                    });
            AlertDialog alertDialog = alertDialogBuilder.create();
            alertDialog.show();

        }
    });
}
    public void calculate() {

        String a = editText1.getText().toString();
        String b = editText2.getText().toString();
        editText3.setText(String.valueOf(Integer.parseInt(a)+ Integer.parseInt(b))+"\n"+String.valueOf(Integer.parseInt(a)* Integer.parseInt(b))+"\n"+String.valueOf(Integer.parseInt(a)-Integer.parseInt(b)));
    }
}

回答1:

Ok, try this way:

First, declare your two EditText (those you want to sum, subtract and multiply the values, etc.) as final inside the onCreate() method of your MainActivity:

final EditText editText1 = (EditText) findViewById(R.id.editText2);
final EditText editText2 = (EditText) findViewById(R.id.editText3);

Second, try this code for your btn2.setOnClickListener:

btn2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MainActivity.this);

        int myNum_one, myNum_two, myNum_three;

        try {

            myNum_one = Integer.parseInt(editText1.getText().toString());
            myNum_two = Integer.parseInt(editText2.getText().toString());

            String s = "Sum of entered number is: %d \n multiply of entered number is: %d \n subtraction of entered number is: %d";
            int sum = myNum_one + myNum_two;
            int multiply = myNum_one * myNum_two;
            int subtraction = myNum_one - myNum_two;
            alertDialogBuilder.setTitle("Detailed Output is");
            alertDialogBuilder.setCancelable(false);
            alertDialogBuilder.setMessage(String.format(s, sum, multiply, subtraction))
                  .setNeutralButton("Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.cancel();
                    }
                });
            AlertDialog alertDialog = alertDialogBuilder.create();
            alertDialog.show();

        } catch(NumberFormatException nfe) {
            Log.d("TAG","Could not parse " + nfe);
        } 

    }
});

回答2:

you can user String.Format to format your string with input parameters.

alertDialogBuilder.setMessage(String.format("(The code should be like as follows)\n\n"+"sum of entered number is:%s\n multiply of entered number is:%s \n subtraction of entered number is:%s"),editText1.getText().toString(), editText2.getText().toString(), editText3.getText().toString())

回答3:

first don't write msg in code because if you want translate your app to different language you don't have option, better practice is used strings.xml file to storage your string

good method is add your msg to strings.xlm file

<string name="myMsg">The code should be like as follows)\n\n sum of entered number is:%1$s \n multiply of entered number is:%2$s\n subtraction of entered number is:%3$s</string>

and if you want use this in code:

String msg = String.format(getResources().getString(R.string.myMsg), editText1,editText2,editText3));

and add to dialog:

alertDialogBuilder.setMessage(msg);