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);   
                }   
            }   
    
    
        });  
// 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);
                }
            }
 
 
        }); 
方法二：
利用EditText 可以设置filter的特性，自定义一个LengthFilter，当输入字数超过限制时 ，做出自定义的提示
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// 输入框限制输入字数   
       InputFilter[] filters = new InputFilter[1];

补充：移动开发 , Android ,