我无法在androidx.appcompat:appcompat:1.1.0上使用API反射 [英] I can't use API reflection on androidx.appcompat:appcompat:1.1.0
问题描述
我对androidx.appcompat:appcompat:1.1.0有问题.这是一个新问题,因为在androidx.appcompat:appcompat:1.0.2上不存在.
I have a problem with androidx.appcompat:appcompat:1.1.0. It's a new problem because on androidx.appcompat:appcompat:1.0.2 it does not exist.
我有一个使用反射从微调器获取mPopup Field并设置其高度的代码.在appcompat:1.0.2上效果很好,但在androidx.appcomppat:appcompat:1.1.0上效果不佳.
I have a code that uses reflection to get mPopup Field from the spinner and set its height. It works very well on appcompat:1.0.2 but not on androidx.appcomppat:appcompat:1.1.0.
代码是
private void setPopUp() {
try {
Field popup = getPopupField();
// Get private mPopup member variable and try cast to ListPopupWindow
final android.widget.ListPopupWindow popupWindow = (android.widget.ListPopupWindow) popup.get(spinner);
// Set popupWindow height to max - 40dp
spinner.post(new Runnable() {
@Override
public void run() {
Rect r = new Rect();
spinner.getGlobalVisibleRect(r);
int height = 200;
popupWindow.setHeight(height);
}
});
} catch (NoClassDefFoundError | ClassCastException | IllegalAccessException e) {
// silently fail...
}
}
private static Field getPopupField () {
if (sPopupField == null) {
try {
Field popup = Spinner.class.getDeclaredField("mPopup");
popup.setAccessible(true);
sPopupField = popup;
} catch (NoClassDefFoundError | ClassCastException | NoSuchFieldException e) {
// silently fail...
}
}
return sPopupField;
}
我从appcompat:1.1.0阅读了有关新appcompatActivity的错误的信息.但是,我找不到解决问题的方法.
I read about bugs on a new appcompatActivity from appcompat:1.1.0. However, I can't find a solution to my problem.
推荐答案
所有人.
我能够做到.
首先,我使用Java代码将微调框放在活动上.以编程方式".
First, i put the spinner on the activity with java code. "programatically".
public void initTest(){
spinner2 = new Spinner(this, Spinner.MODE_DROPDOWN);
spinner2.setAdapter(new ArrayAdapter(this, R.layout.spinner_item, datos));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
spinner2.setId(spinner2.generateViewId());
}
ConstraintLayout parentLayout = (ConstraintLayout)findViewById(R.id.main_activity);
parentLayout.addView(spinner2, 0);
ConstraintSet cs = new ConstraintSet();
cs.clone(parentLayout);
cs.setHorizontalBias(spinner2.getId(), 0.473F);
cs.setVerticalBias(spinner2.getId(), 0.484F);
cs.connect(spinner2.getId(), ConstraintSet.BOTTOM, parentLayout.getId(),ConstraintSet.BOTTOM);
cs.connect(spinner2.getId(), ConstraintSet.START, parentLayout.getId(),ConstraintSet.START);
cs.connect(spinner2.getId(), ConstraintSet.TOP, parentLayout.getId(),ConstraintSet.TOP);
cs.connect(spinner2.getId(), ConstraintSet.END, parentLayout.getId(),ConstraintSet.END);
// cs view id, else getId() returns -1
// connect start and end point of views, in this case top of child to top of parent.
// ... similarly add other constraints
cs.applyTo(parentLayout);
}
然后我调用问题开头的代码.
Then i call the code put at the beginning in my question.
我希望它适用于许多人,并跳过新版本中的错误.
I hope it works for many people, and to skip this error of the new version.
致谢.
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