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);
            }
        }
    }
});