Android editText 输入字数限制

方法一：

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// 输入框限制输入字数  
        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 onTextChanged(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);  
                }  
            }  
   
   
        });