Develop Reference

Open the keyboard as numeric without adding InputType.TYPE_CLASS_NUMBER

Have been trying to implement a way for the soft keyboard to open first the Numeric key without saying that the EditText is numeric.
Is this possible ? if yes how ?
The editText btw are added dynamic, so can't do changes on XML files

You can set input type programmatically.
EditText editText=new EditText(this);
editText.setInputType(InputType.TYPE_CLASS_NUMBER);
Edit
You can use InputFilters
public class NumericInputFilter implements InputFilter {
String regEx = new String("^[0-9]+$")
#Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart,
int dend) {
if (source != null && !source.toString().matches(regEx) && !source.toString().equals( "")) {
return "";
}
return source;
}
and on your editText, editText.setFilters(new InputFilter[]{new NumericInputFilter()});

If we set the editText such as editTextField.setRawInputType(Configuration.KEYBOARD_QWERTY);
it will open a keyboard with numeric first and let me choose the normal one and input letters also.

EditText allow only alphabets, digits of all languages

I have an EditText in which i want to allow only alphabets and numbers of any language. I tried with different android:inputType and android:digits in XML.
I tried with set TextWatcher to edittext in which onTextChanged() is like
#Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
switch (et.getId()) {
case R.id.edtMultiLang: {
et.removeTextChangedListener(watcher2);
et.setText(s.toString().replaceAll("[^[:alpha:]0-9 ]", ""));
// et.setText(s.toString().replaceAll("[^A-Za-z0-9 ]", ""));
et.addTextChangedListener(watcher2);
break;
}
}
}
This is working fine. But whenever i tried to clear text, cursor is moving to start for every letter. Means when i clear a single letter, cursor moving to start.
If i use like android:digits="abcdefghijklmnopqrstuvwxyz1234567890 ", it allows me to type only alphabets and numbers of english. It is not allowing me to enter any other language text As i given only English related alphabets here. But my requirement is to allow copy/paste of other language's alphabets and letters also.
I hope we can do this by using Patterns, TextWatcher and InputFilter. But i didn't find better way.
Please let me know if there any way to do this.

The option you mention to resolve the problem is easy and fast, if you use a filter your code will be like this:
public static InputFilter filter = new InputFilter() {
#Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
String blockCharacterSet = "~#^|$%*!#/()-'\":;,?{}=!$^';,?×÷<>{}€£¥₩%~`¤♡♥_|《》¡¿°•○●□■◇◆♧♣▲▼▶◀↑↓←→☆★▪:-);-):-D:-(:'(:O 1234567890";
if (source != null && blockCharacterSet.contains(("" + source))) {
return "";
}
return null;
}
};
editText.setFilters(new InputFilter[] { filter });

Android EditText, detecting characters before user selection when inputing Chinese

Can i detect characters the user is typing before user's touch selection on the Chinese word?
iOS can achieve this.
This is Android, the EditText TextWatcher will get nothing before user selection.

Read the official doc here.
By using a TextWatcher, you'll have access to the afterTextChanged(), beforeTextChanged() and onTextChanged() methods. Now you can see what pinyin the user enters as he enters it and then change your hanzi suggestions as his input changes.

Try this way
InputFilter filter = new InputFilter() {
#Override
public CharSequence filter(CharSequence source, int start, int end,
Spanned dest, int dstart, int dend) {
//source : latest character typed in edittext
//dest : all characters except source
// HERE YOU WILL GET CALLBACK EVERY TIME key ENTERED IN EDITTEXT
return null;
}
};
edtText.setFilters(new InputFilter[]{filter});

multiline Text box property android?

I've a multiline text box in my app and i want to set a fixed character length so that in one line not more than of that characters appear how to do this?
say if maxlegnth is 150 for textbox then maxlength for single line is to set 50. MAX LENGTH FOR EACH LINE

For TextView elements, or any subclsses of TextView(such as EditText), you can manage this with setFilters().
What you need to do is to create a class implementing InputFilter, for example
public class MyTestFilter implements InputFilter {
#Override
public CharSequence filter(CharSequence source, int start, int end,
Spanned dest, int dstart, int dend) {
// do you checks, and only return what you wish to have replaced
return null;
}
}
and then use
youEditText.setFilters(new InputFilter[]{new MyTestFilter()});

How to disable typing into EditText once its visibilty is set to Gone

I am writing an application on Android and I have these bunch of buttons; when you click on them the input panel (EditText) appears if it is not already visible otherwise it disappears.
The problem is that the user can still type into the EditText even after it's disappeared. I've attached two pictures to show what I mean.
I tried .setEnabled(false) - didn't work.
I tried .setFocusable(false) - didn't work.
I tried both together - didn't work.

You can try hide soft keyboard before setting visibility.
InputMethodManager imm = (InputMethodManager) YourActivity.this.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editView.getWindowToken(), 0);

I think you need to close Android soft keyboard. This link will help you with this issue: Close/hide the Android Soft Keyboard

you can use TextWatcher alongwith flag http://developer.android.com/reference/android/text/TextWatcher.html
prepare logic such that once visibilty gone then in public void onTextChanged(CharSequence s, int start, int before, int count) put same Text as earlier
refer this too Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged

These answers to these questions say you can use an InputFilter
editText.setFilters(new InputFilter[] {
new InputFilter() {
public CharSequence filter(CharSequence src, int start,
int end, Spanned dst, int dstart, int dend) {
return src.length() < 1 ? dst.subSequence(dstart, dend) : "";
}
}
});
Why can I type into a disabled EditText?
Can we have uneditable text in edittext