Removing spaces from string

问题

I'm trying to remove all the spaces from a string derived from user input, but for some reason it isn't working for me. Here is my code.

public void onClick(View src) {
    switch (src.getId()) {
        case R.id.buttonGo:
            String input = EditTextinput.getText().toString();
            input = String.replace(" ", "");
            url = ur + input + l;
            Intent myIntent = new Intent(start.this, Main.class);
            myIntent.putExtra("URL", url);
            start.this.startActivity(myIntent);
            break;
        }
}

回答1:

String  input = EditTextinput.getText().toString();
input = input.replace(" ", "");

Sometimes you would want to remove only the spaces at the beginning or end of the String (not the ones in the middle). If that's the case you can use trim:

input = input.trim();

回答2:

When I am reading numbers from contact book, then it doesn't worked I used

number=number.replaceAll("\\s+", "");

It worked and for url you may use

url=url.replaceAll(" ", "%20");

回答3:

I also had this problem. To sort out the problem of spaces in the middle of the string this line of code always works:

String field = field.replaceAll("\\s+", "");

回答4:

Try this:

String urle = HOST + url + value;

Then return the values from:

urle.replace(" ", "%20").trim();

回答5:

String res =" Application " res=res.trim();

o/p: Application

Note: White space ,blank space are trim or removed

来源：https://stackoverflow.com/questions/6932163/removing-spaces-from-string