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android edittext(android edittext)

 我有一个edittext EditText et1 =（EditText）findViewById（R.id.EditText01）;  
 当我想清除edittext时，我使用et1.setText（“”）; 但是，如果我必须从最后一个字符逐个清除edittext，我没有解决方案，请你给我解决方案 

I have one edittext EditText et1=(EditText)findViewById(R.id.EditText01); 
when i want to clear edittext i use et1.setText(""); but if i have to clear edittext one by one character from the last for this i have no solution can u pls give me solution

原文：https://stackoverflow.com/questions/3715881

更新时间：2022-06-11 15:06

最满意答案

 将您的sessionScope变量直接绑定到xp：checkBox。 通过这种方式，刷新时，复选框将反映对sessionScope变量的任何更改：  
<xp:checkBox id="checkBox1" text="Computed Checkbox" value="#{sessionScope.checked}"></xp:checkBox>
 
 以下是使用按钮进行部分刷新和完全重新加载的示例：  
<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

    <xp:panel id="Panel1">
        <xp:label id="label1" value="Panel1" style="font-weight:bold"></xp:label>
        <xp:button id="button1" value="Button1 - Check the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="partial" refreshId="Panel2">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = true;
                    print("just clicked Button1 sessionScope.checked = ",sessionScope.checked);
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
        <xp:button id="button3" value="Button 2 - Uncheck the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="partial" refreshId="Panel2">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = false;
                    print("just clicked Button2 sessionScope.checked = ",sessionScope.checked);
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>

        <xp:button id="button2" value="Reload page - Uncheck the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="complete">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = true;
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
        <xp:button id="button4" value="Reload page - Check the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="complete">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = false;
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
    </xp:panel>

    <xp:panel id="Panel2">
        <xp:label id="label2" value="Panel2" style="font-weight:bold">
        </xp:label>
        <xp:checkBox id="checkBox1" text="Computed Checkbox" value="#{sessionScope.checked}"></xp:checkBox>
    </xp:panel>
</xp:view>

Bind your sessionScope variable directly to the xp:checkBox. This way any changes to the sessionScope variable will be reflected by the checkbox when refreshed: 
<xp:checkBox id="checkBox1" text="Computed Checkbox" value="#{sessionScope.checked}"></xp:checkBox>
 
Here's an example using your buttons for partial refresh and for full reload: 
<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

    <xp:panel id="Panel1">
        <xp:label id="label1" value="Panel1" style="font-weight:bold"></xp:label>
        <xp:button id="button1" value="Button1 - Check the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="partial" refreshId="Panel2">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = true;
                    print("just clicked Button1 sessionScope.checked = ",sessionScope.checked);
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
        <xp:button id="button3" value="Button 2 - Uncheck the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="partial" refreshId="Panel2">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = false;
                    print("just clicked Button2 sessionScope.checked = ",sessionScope.checked);
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>

        <xp:button id="button2" value="Reload page - Uncheck the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="complete">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = true;
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
        <xp:button id="button4" value="Reload page - Check the Box">
            <xp:eventHandler event="onclick" submit="true" refreshMode="complete">
                <xp:this.action><![CDATA[#{javascript:
                    sessionScope.checked = false;
                }]]></xp:this.action>
            </xp:eventHandler>
        </xp:button>
    </xp:panel>

    <xp:panel id="Panel2">
        <xp:label id="label2" value="Panel2" style="font-weight:bold">
        </xp:label>
        <xp:checkBox id="checkBox1" text="Computed Checkbox" value="#{sessionScope.checked}"></xp:checkBox>
    </xp:panel>
</xp:view>

android edittext(android edittext)

最满意答案

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