Question

public class SampleActivity extends Activity {


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


        final EditText text1 = (EditText) findViewById(R.id.text1);
        final EditText text2 = (EditText) findViewById(R.id.text2);


        text1.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                try {
                    int total = Integer.parseInt(s.toString()) + 1;
                    text2.setText(String.valueOf(total));
                }catch (Exception e){
                    e.printStackTrace();
                }


            }
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
            @Override
            public void afterTextChanged(Editable s) {
            }
        });

        text2.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                try {
                    int total = Integer.parseInt(s.toString()) + 2;
                    text1.setText(String.valueOf(total));
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }

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

            @Override
            public void afterTextChanged(Editable s) {
            }
        });


    }


    }

您好我面临一个问题，多个编辑文本更新并行。如果我在第一个编辑文本中输入值，第二个编辑文本已更改。在第二个edittext中。但是编辑文本中光标的关键监听器存在问题。我无法得到光标。如何解决这个问题？

Answer 1

我不知道你在做什么（或试图做什么）在onTextChanged text1中，您正在触发onTextChanged的{{1}}。看起来像是在这里触发无限文本更改听众正在发生的事情的逻辑 - ＆gt;
假设用户将字符text2输入1。 text1现在是total。现在，您将2设置为text2 total。这反过来会触发2的文本更改侦听器。现在text2是total + 2 = 2。您现在将4设置为4的文本。这反过来会触发text1的文本更改侦听器对我来说似乎是一个永无止境的无限循环。这就是你得到text1错误的原因（笑）你真正想做什么？

不确定可以解决该问题的原因（我手头没有Android Studio的工作副本），但将块移到StackOverflow可能会这样做。

Answer 2

你可以试试这种方式。 TextWatcher将通过AfterTextChanged方法通过Handler将值更新为第二个EditText。

 EditText text1;
 StringBuffer previousChar=new StringBuffer();

        @Override
        protected void onCreate(Bundle savedInstanceState) {
        setContentView(R.layout.activity_main);
        text1=(EditText)findViewById(R.id.editText);
        text1.addTextChangedListener(new TextWatcher() {
                    @Override
                    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                    }
                    @Override
                    public void onTextChanged(CharSequence s, int start, int before, int count) {
                    }
                    @Override
                    public void afterTextChanged(Editable s) {
                        if(!previousChar.toString().equals(s.toString())){
                            Message msg=new Message();
                            msg.obj=s.toString();
                            localHandler.sendMessage(msg);
                            previousChar=new StringBuffer(s.toString());
                            Log.i("TAG", "TextEntered = "+s);
                        }
                    }
                });}

处理程序将用于更新第二个EditText中的文本

private Handler localHandler = new Handler(){
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String value=(String)msg.obj;
            text2.setText(value);
        }
    };

Answer 3

 includeTW = new TextWatcher(){

            @Override
            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                                          int after) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                                      int count) {
                if(!(includedText.getText().toString().equals("")))
                {
                    excludedText.removeTextChangedListener(excludeTW);
                    String included = includedText.getText().toString();
                    excludedText.setText(included); //////// Error Line
                    excludedText.addTextChangedListener(excludeTW);
                }

            }



        };


        excludeTW = new TextWatcher(){

            @Override
            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                                          int after) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if(!(excludedText.getText().toString().equals(""))) {
                    includedText.removeTextChangedListener(includeTW);
                    String excluded = excludedText.getText().toString();
                    includedText.setText(excluded);
                    includedText.addTextChangedListener(includeTW);
                }

            }



        };
        includedText.addTextChangedListener(includeTW) ;
        excludedText.addTextChangedListener(excludeTW);

这将给出我想要的解决方案。我在每个edittext中移动光标获得值。

Answer 4

当第一个EditText处于有效模式时删除另一个EditText的TextChangeListener，并在文本更改后添加它。

<?php

class UrlManager extends CUrlManager
{
    public function createUrl($route,$params=array(),$ampersand='&')
    {
        if (!isset($params['language'])) 
        {
            if (Yii::app()->user->hasState('language'))
                Yii::app()->language = Yii::app()->user->getState('language');
            else if(isset(Yii::app()->request->cookies['language']))
                Yii::app()->language = Yii::app()->request->cookies['language']->value;
            $params['language']=Yii::app()->language;
        }
        return parent::createUrl($route, $params, $ampersand);
    }
}

?>

如何在android中使用Textwatcher更新两个Edittext parralley？

4 个答案: