1.使用的时候 item 数大于 3 个时会有位移
使用下面的类通过反射来修改
/**
* 取消底部的动画效果
*/
public class BottomNavigationViewHelper {
@SuppressLint("RestrictedApi")
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
//noinspection RestrictedApi
item.setShiftingMode(false);
// set once again checked value, so view will be updated
//noinspection RestrictedApi
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
}
使用方法：
bottomNavigationView = findViewById(R.id.bottomNavigationView);
BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);
2.在使用了上面的方法后，如果混淆签名，还需要配置混淆文件,不能混淆这个成员变量！否则会失效的。
-keepclassmembers class android.support.design.internal.BottomNavigationMenuView {
boolean mShiftingMode;
}
