FragmentPagerAdapter图片轮播小圆点跟随传值

布局页面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <android.support.v4.view.ViewPager android:layout_weight="1" android:id="@+id/viewpager" android:layout_width="wrap_content" android:layout_height="0dp" android:text="TextView" /> <RadioGroup android:id="@+id/radioGroup1" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <RadioButton android:id="@+id/radio0" android:layout_width="0dp" android:layout_height="match_parent" android:checked="true" android:layout_weight="1" android:gravity="center" android:button="@null" android:text="首页" /> <RadioButton android:id="@+id/radio1" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:button="@null" android:text="分类" /> <RadioButton android:id="@+id/radio2" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:button="@null" android:text="我的" /> </RadioGroup> </LinearLayout>

MainActivity界面

public class MainActivity extends FragmentActivity { private ViewPager vPager; private RadioGroup rGroup; private RadioButton rdio0; private RadioButton rdio1; private RadioButton rdio2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //获取控件 rGroup = (RadioGroup) findViewById(R.id.radioGroup1); rdio0 = (RadioButton) findViewById(R.id.radio0); rdio1 = (RadioButton) findViewById(R.id.radio1); rdio2 = (RadioButton) findViewById(R.id.radio2); vPager = (ViewPager) findViewById(R.id.viewpager); MyfPAdapter adapter= new MyfPAdapter(getSupportFragmentManager()); vPager.setAdapter(adapter); // 默认背景颜色 rdio0.setBackgroundColor(Color.RED); rdio1.setBackgroundColor(Color.BLUE); rdio2.setBackgroundColor(Color.BLUE); // 默认选择颜色 vPager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int arg0) { // TODO Auto-generated method stub switch (arg0) { case 0: rdio0.setBackgroundColor(Color.RED); rdio1.setBackgroundColor(Color.BLUE); rdio2.setBackgroundColor(Color.BLUE); break; case 1: rdio1.setBackgroundColor(Color.RED); rdio0.setBackgroundColor(Color.BLUE); rdio2.setBackgroundColor(Color.BLUE); break; case 2: rdio2.setBackgroundColor(Color.RED); rdio1.setBackgroundColor(Color.BLUE); rdio0.setBackgroundColor(Color.BLUE); break; default: break; } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); // 点击按钮切换fragment页面 rGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { // TODO Auto-generated method stub switch (checkedId) { case R.id.radio0: vPager.setCurrentItem(0); break; case R.id.radio1: vPager.setCurrentItem(1); break; case R.id.radio2: vPager.setCurrentItem(2); break; default: break; } } }); } }

fragment传值： fragment1：

lv.setOnItemClickListener(new OnItemClickListener() { private TextView text; @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub // 调用公共方法传值 Fragment_textview fragment_t = (Fragment_textview) getActivity() .getSupportFragmentManager().findFragmentById( R.id.framelayout2); fragment_t.setmsg(list.get(position)); // bytag传值 // FragmentActivity activity = getActivity(); // text // =(TextView)activity.getSupportFragmentManager().findFragmentByTag("2").getView().findViewById(R.id.f2_textView1); // text.setText(list.get(position)); } });

fragment2：

// 修改值方法 public void setmsg(String msg) { text.setText(msg); }

轮播页面：

public class Fragment3 extends Fragment { private View view; private ViewPager vpager; // 轮播自动 Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { if (msg.what == 1) { // 获取当前页面 int item = vpager.getCurrentItem(); item++; // 设置页面 vpager.setCurrentItem(item); handler.sendEmptyMessageDelayed(1, 1500); } }; }; private LinearLayout linearlyout; private ImageView imageView; private LayoutParams params; private List<Integer> list; private List<ImageView> list_imag; /* * (non-Javadoc) * * @see * android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, * android.view.ViewGroup, android.os.Bundle) */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { view = inflater.inflate(R.layout.fragment_3, container, false); // 图片集合、不能放全局 list = new ArrayList<Integer>(); // 小点图像集合 list_imag = new ArrayList<ImageView>(); vpager = (ViewPager) view.findViewById(R.id.f3_viewpager); // 线性布局 linearlyout = (LinearLayout) view.findViewById(R.id.f3_linearlyout); return view; } /* * (non-Javadoc) * * @see android.support.v4.app.Fragment#onActivityCreated(android.os.Bundle) */ @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); // 添加数据 list.add(R.drawable.mm); list.add(R.drawable.mm1); list.add(R.drawable.mm2); list.add(R.drawable.mm3); MypagerAdapter adapter = new MypagerAdapter(list, getActivity()); vpager.setAdapter(adapter); //设置最大值 vpager.setCurrentItem(list.size() * 1000); // 监听vpager vpager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int arg0) { // TODO Auto-generated method stub // 改变小点颜色 for (int i = 0; i < list_imag.size(); i++) { if (arg0 % list_imag.size() == i) { list_imag.get(i).setImageResource(R.drawable.shape_yes); } else { list_imag.get(i).setImageResource(R.drawable.shape_no); } } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); handler.sendEmptyMessageDelayed(1, 1500); // 置空圆点集合 必须 if (list_imag != null) { list_imag.clear(); // 小圆点动态添加 for (int i = 0; i < list.size(); i++) { imageView = new ImageView(getActivity()); // 设置颜色 if (i == 0) { imageView.setImageResource(R.drawable.shape_yes); } else { imageView.setImageResource(R.drawable.shape_no); } // 小点的宽高 params = new LayoutParams(15, 15); // 小点间距 params.setMargins(10, 0, 10, 20); list_imag.add(imageView); // 加入到线性布局 linearlyout.addView(imageView, params); } } } /* * (non-Javadoc) * * @see android.support.v4.app.Fragment#onPause() 失去焦点时调用 */ @Override public void onPause() { // TODO Auto-generated method stub // 把handler里面的消息清空 handler.removeCallbacksAndMessages(null); super.onPause(); } }

适配器：

public class MypagerAdapter extends PagerAdapter { List<Integer> list; Context ctx; public MypagerAdapter(List<Integer> list, Context ctx) { super(); this.list = list; this.ctx = ctx; } /* (non-Javadoc) * @see android.support.v4.view.PagerAdapter#getCount() */ @Override public int getCount() { // TODO Auto-generated method stub // 设置最大长度 return Integer.MAX_VALUE; } /* (non-Javadoc) * @see android.support.v4.view.PagerAdapter#isViewFromObject(android.view.View, java.lang.Object) */ @Override public boolean isViewFromObject(View arg0, Object arg1) { // TODO Auto-generated method stub return arg0==arg1; } @Override public void destroyItem(ViewGroup container, int position, Object object) { // TODO Auto-generated method stub container.removeView((View) object); } @Override public Object instantiateItem(ViewGroup container, int position) { // TODO Auto-generated method stub ImageView imageView = new ImageView(ctx); // 磨除集合长度 imageView.setImageResource(list.get(position%list.size())); // 图片填充拉伸 imageView.setScaleType(ScaleType.FIT_XY); container.addView(imageView); return imageView; } }

轮播图片加载网络图片

List<String> imag_list = new ArrayList<>(); String rul1="http://pic8.nipic.com/20100701/5290458_114840036316_2.jpg"; String rul2="http://pic2.nipic.com/20090424/1468853_230119053_2.jpg"; String rul3="http://img3.3lian.com/2013/s1/20/d/57.jpg"; imag_list.add(rul1); imag_list.add(rul2); imag_list.add(rul3); MyPagerAdapter vpadapter = new MyPagerAdapter(imag_list,this); vper.setAdapter(vpadapter); vper.setCurrentItem(10000); // 发送handler延迟空消息 sendMsg();

适配器中instantiateItem方法

@Override public Object instantiateItem(ViewGroup container, int position) { imageView = new ImageView(context); imageView.setScaleType(ImageView.ScaleType.FIT_XY); ImageLoader.getInstance().displayImage(imag_list.get(position%imag_list.size()), imageView); container.addView(imageView); //跳转webview页面 dianji(); return imageView; } private void dianji() { imageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(context, Main2Activity.class); context.startActivity(intent); } }); }

web页面

protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); initView(); // 允许写入JS代码 web.getSettings().setJavaScriptEnabled(true); web.loadUrl("https://www.baidu.com"); } @Override protected void onPause() { super.onPause(); finish(); } private void initView() { web = (WebView) findViewById(R.id.web); } }