我正在尝试创建一个edittext字段，其中出现的字母与用户在edittext字段中输入的字母不同。当用户通常在编辑文本中写下来时，它应该对用户显得正常，但是当用户按下＆＃34;。＆＃34;时，它应该从定义的字符串中放下字符。当用户按下＆＃34;，＆＃34;时，它将放下已定义字符串中的最后一个字符，并允许用户正常按键进入编辑文本。
存在的两个问题是，当用户初始放下＆＃34;。＆＃34;时，用户可以看到＆＃34;。＆＃34;在编辑文本被删除之前，并在编辑文本上添加了一个新的字符。这是个问题。 onKeyUp方法首先播放并更改允许键入和替换其余字符的布尔值。它会在onChangedListner的onTextChanged方法上激活。
另一个问题是编辑文本中没有任何内容，用户按下＆＃34;开始关闭。＆＃34;开始在编辑文本中创建false字符。它给了我一个拼写检查错误，说明＆＃34;解析无效区域，从0到1＆＃34;。我可以为onTextChanged做一个专门检查是否只有＆＃34;。＆＃34;在edittext中，用我定义的字符串的第一部分替换它。
我的java代码如下：
public class MainActivity extends Activity {
//Variables
String currentsecret = "";
String totalstring = "";
boolean secretmodeactivated = false;
int stringsum = 0;
boolean firstperiod = true;
boolean settext = true;
boolean deleteboolean = false;
//variables for second try... fuck
boolean periodactivation = false; //activates on . and deactivates with ,
String thedefaultstring = "Android, please answer the following question ";
int locationwhereperiodhappened = 0;
boolean haschanged; //used when changing within the textwatcher
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText e_petition = (EditText) findViewById(R.id.petition);
final EditText e_question = (EditText) findViewById(R.id.question);
Button b_ask = (Button) findViewById(R.id.ask);
final TextView t_debug = (TextView) findViewById(R.id.debug);
final TextView t_debug2 = (TextView) findViewById(R.id.debug2);
final TextView t_debug3 = (TextView) findViewById(R.id.debug3);
final TextView t_debug4 = (TextView) findViewById(R.id.debug4);
final TextView t_debug5 = (TextView) findViewById(R.id.debug5);
b_ask.setOnClickListener(new OnClickListener() {
String petitionstring;
String fuck;
@Override
public void onClick(View arg0) {
//get the string and display it
petitionstring = e_petition.getText().toString();
fuck = petitionSplitter(petitionstring);
t_debug.setText(fuck);
t_debug2.setText(currentsecret);
//ASKS
}
});
Button b_reset = (Button) findViewById(R.id.reset);
b_reset.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
//clears everything
final EditText e_petition = (EditText) findViewById(R.id.petition);
String currentstring = e_petition.getText().toString();
nextDefaultStringToPutIn(currentstring);
currentsecret = "";
e_petition.setText("");
e_question.setText("");
t_debug.setText("debug");
t_debug2.setText("debug2");
}
});
//edit text on change listener to change the debug texts on keystroke
// e_question.addTextChangedListener(watcher)(
//ISG
e_petition.addTextChangedListener(new TextWatcher(){
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
System.out.println("onTextChanged");
boolean pasttheperiodint = locationwhereperiodhappened <= e_petition.getText().length();
//if the length of the string is less than when the period got put in, the period must have been deleted...
// so turn the period activation OFF then.
if(!pasttheperiodint)
{
periodactivation = false;
}
//activates
if(periodactivation && !haschanged && pasttheperiodint)
{
haschanged = true;
final EditText e_petition = (EditText) findViewById(R.id.petition);
String current = e_petition.getText().toString();
e_petition.setText(nextDefaultStringToPutIn(current));
e_petition.setSelection(e_petition.getText().length());
haschanged = false;
}
}
} );
}
//return the char of the string with location of index
//replaces the END of the string with the current char of the default
//lol
///////////////////////////////////////////////
public String removeLastCharInString(String thestring)
{
if(thestring.isEmpty() && periodactivation)
{
return "A";
}
if(thestring.isEmpty())
{
return "";
}
thestring = thestring.substring(0, thestring.length() - 1);
return thestring;
}
//if type "1234", replaces the 4 with the char "r" which is from Android, pleas... 4th letter.
//meant to be used for once period is in action
public String nextDefaultStringToPutIn(String thestring)
{
//removes the last bit and gets the location
if(thestring.equals("."))
{
return "A";
}
if(thestring.equals('.'))
{
return "A";
}
thestring = removeLastCharInString(thestring);
int thestringlength = thestring.length();
if(thestringlength == 0)
{
return thestring;
}
String defaultstring = thedefaultstring.substring(thestringlength, thestringlength + 1);
System.out.println("!!The string to be printed: " + defaultstring);
//thedefaultstring;
thestring = thestring + defaultstring;
System.out.println("!!!The string to be returned: " + thestring);
return thestring;
}
public char currentstring()
{
char thecurrentstring = 0;
thecurrentstring = thedefaultstring.charAt(stringsum);
// thedefaultstring.charAt(stringsum);
return thecurrentstring;
}
//gives you a string between , and . in a given string
//not sure what happens if given a string w/o , or .
public String petitionSplitter(String input)
{
if(!input.contains(",") && !input.contains("."))
{
//IF your petition doesnt even have a comma AND a period... then
//should return a string from a given list of strings
//to confuse those who don't know how it works
return "You should ask a different question. Put a method that gives you tons of other messages too";
}
if(input.contains(".") && !input.contains(","))
{
//IF your petition doesnt even have a comma AND a period... then
//should return a string from a given list of strings
//to confuse those who don't know how it works
input = input.substring(input.indexOf(".") + 1);
return input;
}
input = input.substring(input.indexOf(",") + 1);
input = input.substring(0, input.indexOf("."));
return input;
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
final EditText e_question = (EditText) findViewById(R.id.question);
final EditText e_petition = (EditText) findViewById(R.id.petition);
switch (keyCode) {
case KeyEvent.KEYCODE_COMMA:
secretmodeactivated = false;
periodactivation = false;
return true;
case KeyEvent.KEYCODE_SEMICOLON:
e_question.requestFocus();
//changes focus onto the question box
return true;
case KeyEvent.KEYCODE_PERIOD:
System.out.println("Period Activated");
secretmodeactivated = true;
periodactivation = true;
locationwhereperiodhappened = e_petition.getText().toString().length();
String current = e_petition.getText().toString();
e_petition.setText(nextDefaultStringToPutIn(current));
e_petition.setSelection(e_petition.getText().length());
firstperiod = false;
//set int as location of index
return true;
case KeyEvent.KEYCODE_DEL:
deleteboolean = true;
return true;
default:
System.out.println(keyCode);
return super.onKeyUp(keyCode, event);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}