Android EditText限制小数点输入两位

限制输入小数点两位

需要对输入框设置键盘类型 inputType:number_decimal

		bank_card_pay_balance.addTextChangedListener(new TextWatcher() {
			boolean deleteLastChar;//是否需要删除末尾
			@Override
			public void onTextChanged(CharSequence s, int start, int before, int count) {
				if(s.toString().contains(".")){
					//如果点后面有超过三位数值,则删掉最后一位
					int length=s.length()-s.toString().lastIndexOf(".");
					if(length>=4){//说明后面有三位数值
						deleteLastChar=true;
					}else{
						deleteLastChar=false;
					}
				}
			}
			@Override
			public void beforeTextChanged(CharSequence s, int start, int count,int after) {
				
			}
			@Override
			public void afterTextChanged(Editable s) {
				if(deleteLastChar){
					//设置新的截取的字符串
					bank_card_pay_balance.setText(s.toString().substring(0, s.toString().length()-1));
					//光标强制到末尾
					bank_card_pay_balance.setSelection(bank_card_pay_balance.getText().length());
				}
			}
		});