Question

当我选择在可点击的TextView上使用onClick调用函数时，如何让函数知道哪个TextView调用了它？

例如，当我在MainActivity.java中有这个时：

public void showHideData(View view)
{
    //Log.v("showHideDataA: ",  "Calling package null, local class name: " + this.getLocalClassName() + " request orientation: " + ("" + this.getRequestedOrientation()));
    if (findViewById(R.id.letterContentTextViewArrayB).getVisibility() == View.VISIBLE)
    {
        findViewById(R.id.checkedB).setVisibility(View.GONE);
        findViewById(R.id.notcheckedB).setVisibility(View.VISIBLE);
        findViewById(R.id.letterContentTextViewArrayB).setVisibility(View.GONE);
    }
    else
    {
        findViewById(R.id.checkedB).setVisibility(View.VISIBLE);
        findViewById(R.id.notcheckedB).setVisibility(View.GONE);
        findViewById(R.id.letterContentTextViewArrayB).setVisibility(View.VISIBLE);
    }
} // end of showHideData(0)

和以下TextViews：

           <TextView 
                android:id="@+id/firstLetterTextViewArrayA"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btn_a_label"
                android:clickable="true"
                android:onClick="showHideData"/>
           <TextView 
                android:id="@+id/firstLetterTextViewArrayB"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btn_b_label"
                android:clickable="true"
                android:onClick="showHideData" />

有没有办法让showHideData（View视图）知道哪个TextView调用了它？

谢谢

Answer 1

public void showHideData(View view)
{
     view.getId();
     ...
}

这将返回被点击的view的ID。所以你可以使用switch声明

public void showHideData(View view)
{
    switch (view.getId()) {
        case R.id.firstLetterTextViewArrayA:
        // logic for this button
        break;
        case R.id.firstLetterTextViewArrayB:
        // logic for this button
        break;
}

函数如何知道哪个可点击的textView用onClick调用了它？

1 个答案: