[问答] 轮播图图片没有传进去 looperPager代码publicclassLooperPagerextendsLinearLayout{ privateTextViewtextView; privateViewPagerviewPager; privateLinearLayoutlinearLayout; privateBindTitleListenermTitleListener=null; privateInnerAdapterinnerAdapter; publicLooperPager(Contextcontext){ this(context,null); } publicLooperPager(Contextcontext,@NullableAttributeSetattrs){ this(context,attrs,0); } publicLooperPager(Contextcontext,@NullableAttributeSetattrs,intdefStyleAttr){ super(context,attrs,defStyleAttr); LayoutInflater.from(context).inflate(R.layout.looper_pager_layout,this,true); init(); } privatevoidinit(){ initView(); initEvent(); } privatevoidinitEvent(){ viewPager.addOnPageChangeListener(newViewPager.OnPageChangeListener(){ @Override publicvoidonPageScrolled(intposition,floatpositionOffset,intpositionOffsetPixels){ //切换的一个回调方法 } @Override publicvoidonPageSelected(intposition){ //切换停下来的回调 if(innerAdapter!=null){ //设置标题 intrealPosition=position%innerAdapter.getDataSize(); if(mTitleListener!=null){ textView.setText(mTitleListener.getTitle(realPosition)); } //切换指示器焦点 updatePoint(); } } @Override publicvoidonPageScrollStateChanged(intstate){ //切换状态改变的回调 } }); } publicinterfaceBindTitleListener{ StringgetTitle(intposition); } publicvoidsetData(InnerAdapteradapter,BindTitleListenerlistener){ this.mTitleListener=listener; viewPager.setAdapter(innerAdapter);// viewPager.setCurrentItem(Integer.MAX_VALUE/2+1); this.innerAdapter=adapter; //根据数据个数，来创建圆点 updatePoint(); } publicabstractstaticclassInnerAdapterextendsPagerAdapter{ @Override publicintgetCount(){ returnInteger.MAX_VALUE; } @Override publicbooleanisViewFromObject(@NonNullViewview,@NonNullObjectobject){ returnview==object; } @Override publicvoiddestroyItem(@NonNullViewGroupcontainer,intposition,@NonNullObjectobject){ container.removeView((View)object); } //初始化 @NonNull @Override publicObjectinstantiateItem(@NonNullViewGroupcontainer,intposition){ intrealPosition=position%getDataSize(); Viewview=getView(container,realPosition); container.addView(view); returnview; } protectedabstractintgetDataSize(); protectedabstractViewgetView(ViewGroupcontainer,intposition); } privatevoidupdatePoint(){ if(innerAdapter!=null&&mTitleListener!=null){ intcount=innerAdapter.getDataSize(); linearLayout.removeAllViews(); for(inti=0;i<count;i++){ Viewpoint=newView(getContext()); if(viewPager.getCurrentItem()%innerAdapter.getDataSize()==i){ point.setBackgroundColor(Color.parseColor("#ff0000")); }else{ point.setBackgroundColor(Color.parseColor("#ffffff")); } //设置大小 LinearLayout.LayoutParamslayoutParams=newLinearLayout.LayoutParams(SizeUtils.dip2px(getContext(),5),SizeUtils.dip2px(getContext(),5)); layoutParams.setMargins(SizeUtils.dip2px(getContext(),5),0,SizeUtils.dip2px(getContext(),5),0); point.setLayoutParams(layoutParams); //添加到容器里面 linearLayout.addView(point); } } } privatevoidinitView(){ viewPager=this.findViewById(R.id.loop_pager); textView=this.findViewById(R.id.loop_title_text); linearLayout=this.findViewById(R.id.linearlayout_loop); }SecMainActivitypublicclassSecMainActivityextendsAppCompatActivity{ privateList<PagerItem>data=newArrayList<>(); privateLooperPagerview; @Override protectedvoidonCreate(@NullableBundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_sec_main); initData(); initView(); } privatevoidinitData(){ data.add(newPagerItem("第一个图片",R.mipmap.pc1)); data.add(newPagerItem("第二个图片",R.mipmap.pc2)); data.add(newPagerItem("第三个图片",R.mipmap.pc3)); data.add(newPagerItem("第四个图片",R.mipmap.pc4)); } privatevoidinitView(){ view=this.findViewById(R.id.sec_looperPager); view.setData(newLooperPager.InnerAdapter(){ @Override protectedintgetDataSize(){ returndata.size(); } @Override protectedViewgetView(ViewGroupcontainer,intposition){ ImageViewiv=newImageView(container.getContext()); iv.setImageResource(data.get(position).getPicResId()); iv.setScaleType(ImageView.ScaleType.FIT_XY); returniv; } },newLooperPager.BindTitleListener(){ @Override publicStringgetTitle(intposition){ returndata.get(position).getTitle(); } }); }运行截图还要这几个提示W/mple.looerpage:AccessinghiddenmethodLandroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V(greylist,reflection,allowed)W/mple.looerpage:AccessinghiddenmethodLandroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V(greylist,reflection,allowed)
