[英]android studio(java) finding view id with string
I'm making a calculator for just a practice, but I found that there are so many buttons. 我只是为了练习而制作计算器,但发现按钮太多了。 I named their id like button+row+col ex) row=5, col=4 -> id=button54 我将他们的ID命名为button + row + col ex)row = 5,col = 4-> id = button54
Since I have to attack listener to every button, I found it very annoying things to do this manually. 由于我必须攻击监听器的每个按钮,因此我发现手动执行此操作非常烦人。 Like, 喜欢,
findViewById(R.id.button11).setOnClickListener(this);
findViewById(R.id.button12).setOnClickListener(this);
...
findViewById(R.id.button95).setOnClickListener(this);
Can I do this like 我可以这样吗
for(int i=1; i<=9; i++){
for(int j=1; j<=5; j++){
findViewById(R.id."button"+Integer.toString(i) + Integer.toString(j)).setOnClickListener(this);
}
}
or other way to make this easier. 或其他方法来简化此过程。
You can't do that. 你不能那样做。 2 possibilities : 2种可能性:
@BindViews
annotation 将ButterKnife与@BindViews
批注一起使用 Since you're working with a lot of buttons I suggest you put them all into a ViewGroup (like LinearLayout, FrameLayout or something like that), then iterate through each View of that ViewGroup, check its instance then assign the click listener. 由于您正在使用许多按钮,因此建议您将它们全部放入一个ViewGroup中(例如LinearLayout,FrameLayout或类似的东西),然后遍历该ViewGroup的每个View,检查其实例,然后分配单击侦听器。
Here is some pseudo-code since I forgot how Java works 这是一些伪代码,因为我忘记了Java是如何工作的
ViewGroup viewGroup = findViewById(R.id.yourViewGroupName);
for each child in viewGroup.getChildren {
if child is of type Button {
child.setOnClickListener(this);
}
}
I think you should add an onClick "ID" in your xml and let Android Studio do the work. 我认为您应该在XML中添加onClick“ ID”,然后让Android Studio来完成。
<Button
android:id="@+id/bt_54"
android:layout_width="100dp"
android:layout_height="100dp"
android:clickable="true"
android:focusable="true"
android:onClick="oc_bt_54"
/>
and now in your xml file hover over the onClick, which should be underlined red and go to the red light bulb on the left. 现在在您的xml文件中,将鼠标悬停在onClick上方,该光标应用红色加下划线并转到左侧的红色灯泡。 Your Option: Creat Method in Activity xy. 您的选择:活动xy中的创建方法。
and now in your Activity you will see: 现在在“活动”中,您将看到:
public void oc_bt_54(View view) {
}
No need for findViewByID()
. 无需findViewByID()
。 Very easy and clean solution. 非常简单和干净的解决方案。
(Tip: if you need the onClick method created in a special Activity, use: (提示:如果需要在特殊活动中创建的onClick方法,请使用:
tools:context=".your_special_Activity"
in the main layout of your xml.) 在xml的主布局中。)
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