将参数从按钮传递给 android:onClick 方法
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Passing parameter from a button to android:onClick method
提问by Murphy316
Hi I have something like this (3 buttons) in my activity xml pointing to same method:
嗨，我的活动 xml 中有这样的（3 个按钮）指向相同的方法：
<Button
android:id="@+id/Button_1"
android:onClick="printNo"
android:text="@string/Button_1" />
<Button
android:id="@+id/Button_2"
android:onClick="printNo"
android:text="@string/Button_2" />
<Button
android:id="@+id/Button_3"
android:onClick="printNo"
android:text="@string/Button_3" />
Is there any way I could determine which button was pressed while in the printNo method ?
有什么方法可以确定在 printNo 方法中按下了哪个按钮？
回答by VicVu
public void printNo( View v ) {
switch (v.getId()) {
case (R.id.Button_1):
//stuff
break;
case (R.id.Button_2):
//stuff
break;
case (R.id.Button_3):
//stuff
break;
}
回答by Aamir Shah
Simply switch over the ID:
只需切换ID：
public void printNo(View v){
switch (v.getId()){
case R.id.Button_1:
break;
case R.id.Button_2:
break;
case R.id.Button_3:
break;
}
回答by Kamil Lelonek
As @user1106018 said - you can use tagin xml like that:
正如@user1106018 所说 - 您可以tag像这样在 xml 中使用：
<Button android:onClick="f" android:tag="0"/>
Then it is really simple to get this tag in this way:
那么通过这种方式获取这个标签真的很简单：
public void f(View v) {
String value = v.getTag();
}
回答by user1693775
Working in my end
在我的最后工作
public void printNo(View v) {
switch (v.getId()) {
case R.id.Button_1:
break;
case R.id.Button_2:
break;
case R.id.Button_3:
break;
}
回答by Drake29a
In xml add tag, np with name of button.
在 xml 中添加标签，np 与按钮名称。
public void printNo(View V){
view.getTag();
// now you can recognize view with getTag()
}
Other answers seems also good;)
其他答案似乎也不错；）
