Android：选择所有文字集中在EditField上 [英] Android: select all text on focus on EditField

问题描述

我正在尝试让Android在获得焦点时选择EditText字段中的所有文本。我在布局中（在两个字段上）都使用了此属性：

I'm trying to get Android to select all the text in an EditText field when it gets the focus. I'm using this attribute in the layout (on both fields):

android:selectAllOnFocus="true"

我不确定这是否有意义，但要将光标移到第一个可编辑字段（也有一个禁用的字段字段），我使用以下命令：

I'm not sure if this is relevant, but to get the cursor to the first editable field (there's also a disabled field before it), I'm using the following commands:

quizStartNum.setFocusable(true);
quizStartNum.requestFocus();

但是，当第一次显示布局时，光标确实移到了所需的字段上，不会突出显示；而是将光标移到文本的左侧（默认行为）。如果我通过触摸移动到第二个字段，则会根据需要选择所有文本。然后，如果我再次移回第一个字段，请再次触摸它，文本也会被完全选中。我想从一开始就拥有这种行为。有办法吗？

But, while the cursor does move to the desired field when the layout is first displayed, the text doesn't get highlighted; instead the cursor ends up to the left of the text, the default behavior. If I move to the second field by touching it, all the text is selected as desired. Then, if I move back to the first field, again by touching it, the text is also completely selected. I would like to have the behavior right from the start. Is there a way to do this?

推荐答案

如果 android：selectAllOnFocus = true 不起作用，请尝试在该特定EditText上调用 setSelectAllOnFocus（true）。

If android:selectAllOnFocus="true" does not work, try calling setSelectAllOnFocus(true) on that particular EditText.

EditText dummy = ... 

dummy.setOnFocusChangedListener(new OnFocusChangedListener(){
    public void onFocusChange(View v, boolean hasFocus){
        if (hasFocus) && (isDummyText())
            ((EditText)v).selectAll();
    }
});

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