Android的使用TextWatcher代替字词 [英] Android using TextWatcher to replace words

问题描述

我有一个 EDITTEXT ，您在写东西，然后当u点击下一步..ü写的文字被写入到另一个EDITTEXT ..
它的工作完美地..
但是，我想用textWatcher替换一些字母。

I have an editText, that you write in it something then when u click next .. the text u wrote gets written into another editText .. It's working perfectly .. But I want to use textWatcher to replace some letters..

例子：我如何在S为$
否则O为@

Example: How do I make the S to be $ or the O to be @

更新：

    final EditText First = (EditText)findViewById(R.id.etFirst);
    String strFirst = First.getText().toString();
    final TextView done = (TextView)findViewById(R.id.tvName);
    String strDone = done.getText().toString();
    Button Trans = (Button) findViewById(R.id.bTrans);

        Trans.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                //First EditText
                if (First.getText().toString().equals("John")) {
                    done.setText("JOHN");
                } else {
                if (First.getText().toString().equals("Ahmed")) {
                    done.setText("AHMED");
                } else  {
                done.setText(First.getText());
                                }
                            }
                        };
                    });

        First.addTextChangedListener(new TextWatcher() {
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

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

            public void afterTextChanged(Editable s) {
            done.setText(First.getText().toString().replaceAll("S", "$"));
            }
            });

我的code将键入的内容，你在写的EditText一个大的TextView下面..当我preSS按钮跨它设置其文本你写的，但我想，以取代一些字母例如S键$ ..当我输入没什么发生..只是原来是这样做不是得到为$ ..

my code will type what you wrote in the EditText to a Large TextView below .. when I press the button Trans it sets the text which you wrote but I want to replace some letters example S to $ .. when I type S nothing happens .. just S it don't gets to be $ ..

我在做什么错了？

推荐答案

分配Textwatcher您EDITTEXT然后像做

Assign the Textwatcher to your editText then do something like

editText.setText(editText.getText().toString().replaceAll("S", "$"));

下面是应用了code中的textWatcher

Here is the textWatcher with code applied

    final EditText First = (EditText)findViewById(R.id.etFirst);
    String strFirst = First.getText().toString();
    final TextView done = (TextView)findViewById(R.id.tvName);
    String strDone = done.getText().toString();
    Button Trans = (Button) findViewById(R.id.bTrans);

        Trans.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                //First EditText
                if (First.getText().toString().equals("John")) {
                    done.setText("JOHN");
                } else {
                if (First.getText().toString().equals("Ahmed")) {
                    done.setText("AHMED");
                } else  {
                done.setText(First.getText());
                                }
                            }
                        };
                    });

        First.addTextChangedListener(new TextWatcher() {
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

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

            public void afterTextChanged(Editable s) {
                String text = First.getText().toString();
                text = text.replace('s', 'd'); // Any of the diffrent replace methods should work.
                text = text.replace('S', '$'); // This uses the char replace method. Note, the ' quotations
                text = text.replace('O', '@');
                text = text.replace('o', '@');
                done.setText(text);
            }
        });

其可能在事实居住的错误，你将再次得到老的字符串，并应用 text.replace 就可以了。而不是修改后的字符串。我本来期望它已经得到了新的字符串，但的setText似乎没有立即开火。

Its possible that the error resided in the fact you are getting the old string again, and applying text.replace on it. Rather than the modified string. I would have expected it to have got the new string, but setText doesnt seem to fire immediately.

所以，如果你得到的字符串到一个变量，然后应用所有更改。然后把它回到文本框它将很好地工作。 （我已经测试和工作code上面粘贴在这里）

So if you get the string into a variable, then apply all your changes. Then put it back to your text box it will work fine. (I have tested and working code here Pasted above)

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