2016-11-8 遇到的一点小问题
收入界面需要用到RadioGroup来切换Viewpager的Item显示，Viewpager滑动时也需要切换RadioGroup的选中；效果如图：
内容不多，懒得用Fragment和FragmentPagerAdapter，直接用的View和PagerAdapter。
PagerAdapter mAdapter =newPagerAdapter(){
@Override
public intgetCount() {
returnradioId.length;
}
@Override
public booleanisViewFromObject(View paramView, Object paramObject) {
returnparamView == paramObject;
}
@Override
public voiddestroyItem(ViewGroup container,intposition, Object object) {container.removeView((View) object);
}
@Override
publicObject instantiateItem(ViewGroup container,intposition) {
View view = LayoutInflater.from(context).inflate(R.layout.list_income,null);
TextView textName = (TextView) view.findViewById(R.id.name);
textName.setText(pageName[position]+"：￥560.00");
container.addView(view);
returnview;
}
};
然后在mPager.addOnPageChangeListener的onPageSelected(intposition)方法里来设置RadioGroup中的RadioButton的选中切换
之前用的是mRadio.check(radioId[position]);方法，
发现RadioGroup的setOnCheckedChangeListener里的onCheckedChanged(RadioGroup group,intcheckedId)会被调用三次所以只好改成
((RadioButton)mRadio.getChildAt(position)).setChecked(true);
这样ViewPager滑动结束时就只调用一次onCheckedChanged；
在RadioGroupon的CheckedChanged设置mPager.setCurrentItem(index);会多次调用，因此只好加了个变量 booleanis PageChange。
好了，这边贴一下代码，以后再使用就直接拿。
private static final int[]radioId= {R.id.radio0,R.id.radio1,R.id.radio2,R.id.radio3};//radioButton的id
private booleanisPageChange;//防止onPageSelected与onCheckedChanged冲突
finalRadioGroup mRadio = (RadioGroup) findViewById(R.id.radio);
finalViewPager mPager = (ViewPager) findViewById(R.id.pager);
mRadio.setOnCheckedChangeListener(newRadioGroup.OnCheckedChangeListener() {
@Override
public voidonCheckedChanged(RadioGroup group,intcheckedId) {
if(isPageChange){
isPageChange=false;
return;
}
isPageChange=true;
intindex = Arrays.binarySearch(radioId, checkedId);
mPager.setCurrentItem(index);
}
});
mPager.addOnPageChangeListener(newViewPager.OnPageChangeListener() {
@Override
public voidonPageScrolled(intposition,floatpositionOffset,intpositionOffsetPixels) {}
@Override
public voidonPageSelected(intposition) {
if(isPageChange){
isPageChange=false;
return;
}
isPageChange=true;
((RadioButton)mRadio.getChildAt(position)).setChecked(true);
}
@Override
public voidonPageScrollStateChanged(intstate) {}
});
PagerAdapter mAdapter =newPagerAdapter(){
@Override
public intgetCount() {
returnradioId.length;
}
@Override
public booleanisViewFromObject(View paramView, Object paramObject) {
returnparamView == paramObject;
}
@Override
public voiddestroyItem(ViewGroup container,intposition, Object object) {container.removeView((View) object);
}
@Override
publicObject instantiateItem(ViewGroup container,intposition) {
View view = LayoutInflater.from(context).inflate(R.layout.list_income,null);
TextView textName = (TextView) view.findViewById(R.id.name);
textName.setText(pageName[position]+"：￥560.00");
container.addView(view);
returnview;
}
};
mPager.setOffscreenPageLimit(3)；
mPager.setAdapter(mAdapter);
之前都是发的51CTO博客，换这边试试
二分法搜索的问题：http://qq445493481.blog.51cto.com/9545543/1791789
