比较字符串数组与Android中的一个字符串？

Question

when clicking on the button it does nothing ,,,after testing I concluded the problem is with the equal method statment ,,,the whole issue is when comparing string array to string any solutions?

EditText coderead = (EditText)findViewById(R.id.editText1);
        Button   go       = (Button)findViewById(R.id.button1); 
        final String mn=coderead.getText().toString();          
            final String code[] = {"m1","n2"};
            final double pointx[] ={23.666666,65.22222};
            final double pointy[] ={31.55555,29.665544};

        go.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent transfercode = new Intent(getApplicationContext(), FeenbezabtActivity.class);

                for (int i=0; i<code.length; i++) {
                    if(code[i].equals(mn)) {
                        transfercode.putExtra("lat2", pointx[i]);
                        transfercode.putExtra("long", pointy[i]);
                    startActivity(transfercode);
                    }

                    else{Toast.makeText(getBaseContext(), "code not found", 5000);}
                }
            }
        });

Answer 1

Your mn variable should be read after your button has been clicked.

Button go  = (Button) findViewById(R.id.button1); 
final String code[] = {"m1", "n2"};
final double pointx[] = {23.666666, 65.22222};
final double pointy[] = {31.55555, 29.665544};

go.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent transfercode = new Intent(getApplicationContext(), FeenbezabtActivity.class);

        // mn should be read after the button click!
        EditText coderead = (EditText) findViewById(R.id.editText1);
        final String mn = coderead.getText().toString();          

        for (int i = 0; i < code.length; i++) {
            if (code[i].equals(mn)) {
                transfercode.putExtra("lat2", pointx[i]);
                transfercode.putExtra("long", pointy[i]);
                startActivity(transfercode);
            } else {
                Toast.makeText(getBaseContext(), "code not found", 5000);
            }
        }
    }
});

Answer 2

So if I understand your code correctly you are trying to respond to a button click and take the text that has been input and do something based on that?

You are setting the value of mn at the time you are creating the button, rather than when the button is pressed. At that time the text will be empty (or null). You should move the code to get the value of the entered text to within the onClickListener.

Answer 3

您的“找不到代码”消息是否应该在for循环之外发生？

Answer 4

What do you mean by nothing happens? Do you get a Toast message or not? Did you make sure that no error is being generated? If you are not getting the Toast Message and you have no errors, then make sure the intent is correct. I would recommend you debug the code from the line of
Intent transfercode = new Intent(getApplicationContext(), FeenbezabtActivity.class);
Then, report what is happening back here.

Answer 5

Something I don't get. With these two lines:

    final String mn=coderead.getText().toString();          
        final String code[] = {"m1","n2"};

Why don't you just compute the (final) index to code right then and there, vs waiting until onClick ?