|
android editText 輸入字?jǐn)?shù)限制
方法一：
// 輸入框限制輸入字?jǐn)?shù)
editText.addTextChangedListener(new TextWatcher() {
private CharSequence temp;
private boolean isEdit = true;
private int selectionStart ;
private int selectionEnd ;
@Override
public void beforeTextChanged(CharSequence s, int arg1,
int arg2,
int arg3) {
temp = s;
}
@Override
public void on
TextChanged(CharSequence s, int arg1,
int arg2,
int arg3) {
}
@Override
public void afterTextChanged(Editable s) {
selectionStart = editText.getSelectionStart();
selectionEnd = editText.getSelectionEnd();
Log.i("gongbiao1",""+selectionStart);
if (temp.length() > Constant.TEXT_MAX) {
Toast.makeText(KaguHomeActivity.this,
R.string.edit_content_limit,
Toast.LENGTH_SHORT)
.show();
s.delete(selectionStart-1, selectionEnd);
int tempSelection = selectionStart;
editText.setText(s);
editText.setSelection(tempSelection);
}
}
});
方法二：
利用EditText可以設(shè)置filter的特性，自定義一個(gè)LengthFilter,，當(dāng)輸入字?jǐn)?shù)超過限制時(shí) ,，做出自定義的提示
// 輸入框限制輸入字?jǐn)?shù)
InputFilter[] filters = new InputFilter[1];
filters[0] = new InputFilter.LengthFilter(Constant.TEXT_MAX) {
@Override
public CharSequence filter(CharSequence source, int
start, int end,
Spanned dest, int dstart, int dend) {
if (source.length() > 0 && dest.length()
== Constant.TEXT_MAX) {
if ((System.currentTimeMillis() - toastTime)
> interval) {
toastTime = System.currentTimeMillis();
Toast
.makeText(KaguHomeActivity.this,
R.string.edit_content_limit,
Toast.LENGTH_SHORT).show();
}
}
if (dest.toString().equals(
getResources().getString(R.string.input_default_txt))) {
Bundle data = new Bundle();
data.putCharSequence("source", source);
Message message = textHandler.obtainMessage();
message.setData(data);
message.sendToTarget();
}
return super.filter(source, start, end, dest,
dstart, dend);
}
};
editText.setFilters(filters);
private Handler textHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
Bundle data = msg.getData();
CharSequence source = data.getCharSequence("source");
editText.setTextColor(Color.BLACK);
editText.setText(source);
editText.setSelection(source.length());
}
};
|
