Android 将焦点从一个编辑文本框移到另一个
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Move focus from one Edit text box to another
提问by Vamsi
I am writing a simple calculator application(using absolute layout with 3 edit boxes and some buttons), which has two inputtext boxes and a output box.
我正在编写一个简单的计算器应用程序（使用带有 3 个编辑框和一些按钮的绝对布局），它有两个输入文本框和一个输出框。
input1 = (EditText) findViewById(R.id.input1);
input2 = (EditText) findViewById(R.id.input2);
now once user enters some numerics into input1 and presses '+', now i want to shift the focus from input1 to input2. How can i do that?
现在一旦用户在 input1 中输入一些数字并按“+”，现在我想将焦点从 input1 转移到 input2。我怎样才能做到这一点？
I tried the below code on keypress of '+'
我在“+”的按键上尝试了以下代码
onClick(View arg0){
operator.setText("+");
//Move focus from input1 to input2
input1.clearFocus();
input2.setNextFocusDownId(input2.getId());
}
but this is not working.. can you please help me on this?
但这不起作用..你能帮我吗？
回答by Vamsi
Well, I found the answer: we can simply call input2.requestFocus();to change the focus.
好吧，我找到了答案：我们可以简单地打电话input2.requestFocus();来改变焦点。
回答by danigonlinea
Try this:
尝试这个：
input1.setNextFocusDownId(input2.getId());
input1.setNextFocusDownId(input2.getId());
you are using input2, and I guess that you want to go from input1 to input2.
您正在使用 input2，我猜您想从 input1 转到 input2。
回答by Eric Mill
[By the way, you want to avoid using AbsoluteLayout - it's deprecated, and may be removed.]
[顺便说一句，您想避免使用 AbsoluteLayout - 它已被弃用，并且可能会被删除。]
Instead of using onClick, you want the action to happen in a KeyListener's onKeyDown method.
您希望操作发生在 KeyListener 的 onKeyDown 方法中，而不是使用 onClick。
See: setKeyListener
请参阅：setKeyListener
Then you can examine the KeyEvent's key with
然后你可以检查KeyEvent的键
KeyEvent.getAction() == KeyEvent.KEYCODE_PLUS
