Android：如何将“视图”转换为“视图”到“文本视图”？

发布于 2024-12-17 09:47:52 字数 359 浏览 4 评论 0原文

我有许多 TextView，每个都共享一个 OnLongClickListener

在 onLongClick 事件中，我想识别哪个 TextView 触发了该事件。

但是，该事件定义为：

public boolean onLongClick(View view)

我尝试将 view 转换为 TextView，但这不起作用。

如何获取触发 OnLongClick 事件的小部件？

原文

I have a number of TextViews that each share a single OnLongClickListener

Within the onLongClick event, I want to identify which TextView triggered the event.

However, the event is defined as:

public boolean onLongClick(View view)

I tried casting view to TextView, but that didn't work.

How can I get at the widget that triggered the OnLongClick event?

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我纯我任性 2024-12-24 09:47:53

View 应该是您的 TextView。

尝试这样的操作：

if( view instanceof TextView ) {
  TextView textView = (TextView) view;
  //Do your stuff
}

要验证上面的 if 语句是否有效，您可以尝试先像这样运行它：

if( view instanceof TextView ) {
  Log.e( "MyTag", "It's a TextView!" );
}

The View should be your TextView.

Try something like this:

if( view instanceof TextView ) {
  TextView textView = (TextView) view;
  //Do your stuff
}

To verify that the above if-statement is valid you can try running it like this first:

if( view instanceof TextView ) {
  Log.e( "MyTag", "It's a TextView!" );
}

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嘦怹 2024-12-24 09:47:53

使用 view.getId() 方法获取单击视图的 id。

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神经大条 2024-12-24 09:47:53

public boolean onLongClick(View v) {
        switch(v.getId()) {
            case R.id.first_text_view: // do things here; break;
                ...
        }
        return true;
    }

public boolean onLongClick(View v) {
        switch(v.getId()) {
            case R.id.first_text_view: // do things here; break;
                ...
        }
        return true;
    }

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瘫痪情歌 2024-12-24 09:47:53

TextView 已经是一个View，所有的小部件都从View扩展，所以你需要的只是一个开关在 TextView 的 id 上，如下所示：

public boolean onLongClick(View v) {
        switch(v.getId()) {
            case R.id.txt1: // your code for the textView which have the id R.id.txt1  ...;
                     break;
            case R.id.txt2: // your code for the textView which have the id R.id.txt2  ...; 
                    break;
                //... etc
        }
        return true;
    }

The TextView is Already a View, All Widgets Are extending from View, so all what you need is a switch on the id of your TextViews like this :

public boolean onLongClick(View v) {
        switch(v.getId()) {
            case R.id.txt1: // your code for the textView which have the id R.id.txt1  ...;
                     break;
            case R.id.txt2: // your code for the textView which have the id R.id.txt2  ...; 
                    break;
                //... etc
        }
        return true;
    }

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