• ViewPager+fragment的使用


    如图我在一个继承FragmentActivity的类中嵌套了3个fragment分别能实现3个不同的界面,默认展现第一个,在第一个的fragment中有个ViewPager在ViewPager中嵌套了3个不同的fragment来实现页面的跳转

    主界面的代码

    package org.xml.demo.fragment;
    
    import ogg.huanxin.huadong.R;
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentActivity;
    import android.support.v4.app.FragmentTransaction;
    import android.view.View;
    import android.view.Window;
    import android.widget.Button;
    
    public class MyFragmentDemo extends FragmentActivity {
    
        private int index;
        // 当前fragment的index
        private int currentTabIndex;
        private Fragment[] fragments;
        private Button[] buttons;
    
        private HomeFeagment homeFeagment;
        private FengqiangFragment fengqiangFragment;
        private PinPaiFragment pinPaiFragment;
    
        @Override
        protected void onCreate(Bundle arg0) {
            // TODO Auto-generated method stub
            super.onCreate(arg0);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            super.setContentView(R.layout.myviewpagerdemo);
            setFindViewById();
            setListener();
            setControll();
    
        }
    
        private void setFindViewById() {
            // TODO Auto-generated method stub
            buttons = new Button[3];
            buttons[0] = (Button) findViewById(R.id.bb_viewdemo_shou);
            buttons[1] = (Button) findViewById(R.id.bb_viewdemo_qiang);
            buttons[2] = (Button) findViewById(R.id.bb_viewdemo_pinpai);
            // 把第一个设置成默认选中状态
            buttons[0].setSelected(true);
    
        }
    
        private void setListener() {
            // TODO Auto-generated method stub
    
        }
    
        private void setControll() {
            // TODO Auto-generated method stub
            homeFeagment = new HomeFeagment();
            fengqiangFragment = new FengqiangFragment();
            pinPaiFragment = new PinPaiFragment();
    
            fragments = new Fragment[] { homeFeagment, fengqiangFragment,
                    pinPaiFragment };
            // 添加显示第一个fragment
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.rl_viewdemo_fragment, homeFeagment)
                    .add(R.id.rl_viewdemo_fragment, fengqiangFragment)
                    .add(R.id.rl_viewdemo_fragment, pinPaiFragment)
                    .hide(fengqiangFragment).hide(pinPaiFragment)
                    .show(homeFeagment).commit();
        }
    
        public void OnSeclet(View view) {
            switch (view.getId()) {
            case R.id.bb_viewdemo_shou:
                index = 0;
                System.out.println("ProducteTimeLimit-----" + index);
                break;
            case R.id.bb_viewdemo_qiang:
                index = 1;
                System.out.println("MyFragent" + index);
                break;
            case R.id.bb_viewdemo_pinpai:
                index = 2;
                break;
    
            }
            if (currentTabIndex != 0) {
                buttons[0].setSelected(false);
            }
            if (currentTabIndex != index) {
                FragmentTransaction trx = getSupportFragmentManager()
                        .beginTransaction();
                trx.hide(fragments[currentTabIndex]);
    
                if (!fragments[index].isAdded()) {
                    trx.add(R.id.rl_viewdemo_fragment, fragments[index]);
                }
                trx.show(fragments[index]).commit();
            }
            buttons[currentTabIndex].setSelected(false);
            // 把当前tab设为选中状态
            buttons[index].setSelected(true);
            currentTabIndex = index;
        }
    
    }

    主界面xml的代码

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#ffffff" >
    
        <LinearLayout
            android:id="@+id/ll_viewedemo_top"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_alignParentBottom="true"
            android:gravity="center_vertical"
            android:orientation="vertical" >
    
            <View
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:background="#999999" />
    
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:baselineAligned="false"
                android:gravity="center"
                android:orientation="horizontal" >
    
                <RelativeLayout
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1" >
    
                    <Button
                        android:id="@+id/bb_viewdemo_shou"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:background="@android:color/white"
                        android:onClick="OnSeclet"
                        android:drawableTop="@drawable/main_topcolor"
                        android:gravity="center_vertical|center"
                        android:text="首页"
                        android:textColor="@color/main_bottoncolor"
                        android:textSize="15sp" />
                </RelativeLayout>
    
                <RelativeLayout
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1" >
    
                    <Button
                        android:id="@+id/bb_viewdemo_qiang"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:onClick="OnSeclet"
                        android:background="@android:color/white"
                        android:drawableTop="@drawable/main_topcolor"
                        android:gravity="center_vertical|center"
                        android:text="最后疯抢"
                        android:textColor="@color/main_bottoncolor"
                        android:textSize="15sp" />
                </RelativeLayout>
    
                <RelativeLayout
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1" >
    
                    <Button
                        android:id="@+id/bb_viewdemo_pinpai"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:onClick="OnSeclet"
                        android:background="@android:color/white"
                        android:drawableTop="@drawable/main_topcolor"
                        android:gravity="center_vertical|center"
                        android:text="品牌抢购"
                        android:textColor="@color/main_bottoncolor"
                        android:textSize="15sp" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    
        <RelativeLayout
            android:id="@+id/rl_viewdemo_fragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@id/ll_viewedemo_top" >
        </RelativeLayout>
    
    </RelativeLayout>
    View Code

    其中默认显示主界面的代码为

    package org.xml.demo.fragment;
    
    import java.util.ArrayList;
    
    import ogg.huanxin.huadong.R;
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentManager;
    import android.support.v4.app.FragmentPagerAdapter;
    import android.support.v4.view.ViewPager;
    import android.support.v4.view.ViewPager.OnPageChangeListener;
    import android.util.DisplayMetrics;
    import android.util.Log;
    import android.view.Display;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.LinearLayout;
    import android.widget.TextView;
    import android.widget.LinearLayout.LayoutParams;
    
    public class HomeFeagment extends Fragment {
        private ViewPager mPager;
        private TextView barText;
        private TextView view1, view2, view3;
        private ArrayList<Fragment> fragmentlist;
        private int currIndex;// 当前的叶卡标号
    
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            return inflater.inflate(R.layout.homefeagment, container, false);
        }
    
        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
            InitTextView();
            InitTextBar();
            InitViewPager();
        }
    
        /*
         * 初始化标签名字
         */
        private void InitTextView() {
            view1 = (TextView) getActivity().findViewById(R.id.hometext1);
            view2 = (TextView) getActivity().findViewById(R.id.hometext2);
            view3 = (TextView) getActivity().findViewById(R.id.hometext3);
    
            view1.setOnClickListener(new txListener(0));
            view2.setOnClickListener(new txListener(1));
            view3.setOnClickListener(new txListener(2));
        }
    
        private class txListener implements View.OnClickListener {
            private int index = 0;
    
            public txListener(int i) {
                index = i;
            }
    
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                mPager.setCurrentItem(index);
            }
        }
    
        /*
         * 初始化图片的位移像素
         */
        private void InitTextBar() {
            // TODO Auto-generated method stub
            // barText = (TextView) super.findViewById(R.id.cursor);
            barText = (TextView) getActivity().findViewById(R.id.homecursor);
            Display display = getActivity().getWindow().getWindowManager()
                    .getDefaultDisplay();
            // 得到显示的屏宽度
            DisplayMetrics metrics = new DisplayMetrics();
            display.getMetrics(metrics);
            int tabLimeLength = metrics.widthPixels / 3;
            LayoutParams lp = (LayoutParams) barText.getLayoutParams();
            lp.width = tabLimeLength;
            barText.setLayoutParams(lp);
        }
    
        /*
         * 初始化ViewPager
         */
        private void InitViewPager() {
            // TODO Auto-generated method stub
            mPager = (ViewPager) getActivity().findViewById(R.id.vhomePager);
            fragmentlist = new ArrayList<Fragment>();
            Fragment fragment = new Fragment1();
            Fragment fragment2 = new Fragmentview2();
            Fragment fragment3 = new Fragmentview3();
            fragmentlist.add(fragment);
            fragmentlist.add(fragment2);
            fragmentlist.add(fragment3);
            // 给ViewPager添加适配器
    
            // 给ViewPager设置适配器
            mPager.setAdapter(new MyFragmentPagerAdapter(getChildFragmentManager(),
                    fragmentlist));
            // 设置当前显示标签页为第一页
            mPager.setCurrentItem(0);
            // mPager.setOnPageChangeListener(new MyPn);
            // 页面变化时的监听器
            mPager.setOnPageChangeListener(new MyOnpageChangeListener());
        }
    
        
    
        private class MyFragmentPagerAdapter extends FragmentPagerAdapter {
            private ArrayList<Fragment> list;
    
            public MyFragmentPagerAdapter(FragmentManager fm,
                    ArrayList<Fragment> list) {
                super(fm);
                this.list = list;
                // TODO Auto-generated constructor stub
            }
    
            // 得到每个item
            @Override
            public Fragment getItem(int arg0) {
                // TODO Auto-generated method stub
                return list.get(arg0);
            }
    
            // 初始化每个页面选项
            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                // TODO Auto-generated method stub
                return super.instantiateItem(container, position);
            }
    
            @Override
            public int getCount() {
                // TODO Auto-generated method stub
                return list.size();
            }
    
            @Override
            public int getItemPosition(Object object) {
                // TODO Auto-generated method stub
                return super.getItemPosition(object);
            }
    
        }
    
        private class MyOnpageChangeListener implements OnPageChangeListener {
    
            @Override
            public void onPageScrollStateChanged(int arg0) {
                /*
                 * 此方法是在状态改变的时候调用,其中arg0这个参数 有三种状态(0,1,2)。arg0
                 * ==1的时辰默示正在滑动,arg0==2的时辰默示滑动完毕了,arg0==0的时辰默示什么都没做。
                 */
                if (arg0 == 0) {
                    Log.e("-----------", ">>>>>>>>>>onpageselected==0");
                } else if (arg0 == 1) {
                    Log.e("-----------", ">>>>>>>>>>onpageselected==1");
                } else if (arg0 == 2) {
                    Log.e("-----------", ">>>>>>>>>>onpageselected==2");
                }
    
            }
    
            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                /*
                 * onPageScrolled(int arg0,float arg1,int arg2)
                 * ,当页面在滑动的时候会调用此方法,在滑动被停止之前,此方法回一直得到 调用。 其中三个参数的含义分别为: arg0:当前页面,
                 * 及你点击滑动的页面 arg1:当前页面偏移的百分比 arg2:当前页面偏移的像素位置
                 */
                Log.e("-----------", "------------>>>>onpagescrolled>>>arg0=="
                        + arg0 + ">>>arg1==" + arg1 + ">>>arg2==" + arg2);
    
                LinearLayout.LayoutParams ll = (LayoutParams) barText
                        .getLayoutParams();
                if (currIndex == arg0) {
                    ll.leftMargin = (int) (currIndex * barText.getWidth() + arg1
                            * barText.getWidth());
                } else if (currIndex > arg0) {
                    ll.leftMargin = (int) (currIndex * barText.getWidth() - (1 - arg1)
                            * barText.getWidth());
                }
                barText.setLayoutParams(ll);
            }
    
            @Override
            public void onPageSelected(int arg0) {
                /*
                 * onPageSelected(int arg0) : 此方法是页面跳转完后得到调用,
                 * arg0是你当前选中的页面的Position(位置编号)。
                 */
                currIndex = arg0;
    
            }
    
        }
    }
    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#eee" >
    
        <LinearLayout
            android:id="@+id/ll_main_text"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:background="#FF7200"
            android:gravity="center_vertical" >
    
            <LinearLayout
                android:layout_width="60dp"
                android:layout_height="match_parent"
                android:gravity="center" >
    
                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:contentDescription="@null"
                    android:scaleType="fitCenter"
                    android:src="@drawable/arrow_left" />
            </LinearLayout>
    
            <View
                android:layout_width="0.5dp"
                android:layout_height="match_parent"
                android:background="#FE8B40" />
    
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="0.8"
                android:gravity="center"
                android:text="限时购"
                android:textColor="@android:color/white"
                android:textSize="20sp" />
    
            <View
                android:layout_width="0.5dp"
                android:layout_height="match_parent"
                android:background="#FE8B40" />
    
            <LinearLayout
                android:layout_width="60dp"
                android:layout_height="match_parent"
                android:gravity="center" >
    
                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:contentDescription="@null"
                    android:scaleType="fitCenter"
                    android:src="@drawable/dropdown" />
            </LinearLayout>
        </LinearLayout>
    
        <!--  -->
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/ll_main_text"
            android:background="@android:color/white"
            android:orientation="vertical" >
    
            <LinearLayout
                android:id="@+id/linearlayout1"
                android:layout_width="match_parent"
                android:layout_height="50.0dip"
                android:layout_gravity="center"
                android:background="#FFFFFF" >
    
                <TextView
                    android:id="@+id/hometext1"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1.0"
                    android:gravity="center"
                    android:text="页卡1"
                    android:textColor="#000000"
                    android:textSize="22.0dip" />
    
                <TextView
                    android:id="@+id/hometext2"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1.0"
                    android:gravity="center"
                    android:text="页卡2"
                    android:textColor="#000000"
                    android:textSize="22.0dip" />
    
                <TextView
                    android:id="@+id/hometext3"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1.0"
                    android:gravity="center"
                    android:text="页卡3"
                    android:textColor="#000000"
                    android:textSize="22.0dip" />
            </LinearLayout>
    
            <TextView
                android:id="@+id/homecursor"
                android:layout_width="250dp"
                android:layout_height="5dp"
                android:background="#990033" />
    
            <android.support.v4.view.ViewPager
                android:id="@+id/vhomePager"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:background="#eee"
                android:flipInterval="30"
                android:persistentDrawingCache="animation" />
        </LinearLayout>
    
    </RelativeLayout>
    View Code

    第二个fragment代码和xml

    package org.xml.demo.fragment;
    
    import ogg.huanxin.huadong.R;
    import android.app.AlertDialog;
    import android.app.AlertDialog.Builder;
    import android.app.ProgressDialog;
    import android.content.DialogInterface;
    import android.os.Bundle;
    import android.os.Handler;
    import android.support.v4.app.Fragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.view.ViewGroup;
    import android.widget.Button;
    
    public class FengqiangFragment extends Fragment implements OnClickListener {
        private Button dialogButton;
        private ProgressDialog progressDialog;
    
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            return inflater.inflate(R.layout.fengqiangframent, container, false);
        }
    
        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
            setFindViewById();
            setListener();
            setControll();
        }
    
        private void setFindViewById() {
            // TODO Auto-generated method stub
            dialogButton = (Button) getActivity().findViewById(
                    R.id.bb_fengqiang_dialog);
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在跳转");
            // 设置返回键不能将其取消
            progressDialog.setCancelable(false);
        }
    
        private void setListener() {
            // TODO Auto-generated method stub
            dialogButton.setOnClickListener(this);
        }
    
        private void setControll() {
            // TODO Auto-generated method stub
    
        }
    
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            switch (arg0.getId()) {
            case R.id.bb_fengqiang_dialog:
                dialogSet();
                break;
    
            default:
                break;
            }
        }
    
        /*
         * 设置一个警告框
         */
        private void dialogSet() {
            // TODO Auto-generated method stub
            AlertDialog.Builder builder = new Builder(getActivity());
            builder.setTitle("是否跳转");
            builder.setMessage("当点击    确定    时 会出现个圆形的进度条  在5秒后 自动消失 ...");
            builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    
                @Override
                public void onClick(DialogInterface arg0, int arg1) {
                    // TODO Auto-generated method stub
                    progressDialog.show();
                    new Handler().postDelayed(new Runnable() {
    
                        @Override
                        public void run() {
                            // TODO Auto-generated method stub
                            progressDialog.dismiss();
                        }
                    }, 5000);
                }
            });
            builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
    
                @Override
                public void onClick(DialogInterface arg0, int arg1) {
                    // TODO Auto-generated method stub
    
                }
            });
            builder.create().show();
        }
    }
    View Code
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >
    
        <LinearLayout
            android:id="@+id/ll_main_text"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:background="#FF7200"
            android:gravity="center_vertical" >
    
            <LinearLayout
                android:layout_width="60dp"
                android:layout_height="match_parent"
                android:gravity="center" >
    
                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:contentDescription="@null"
                    android:scaleType="fitCenter"
                    android:src="@drawable/arrow_left" />
            </LinearLayout>
    
            <View
                android:layout_width="0.5dp"
                android:layout_height="match_parent"
                android:background="#FE8B40" />
    
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="0.8"
                android:gravity="center"
                android:text="限时购"
                android:textColor="@android:color/white"
                android:textSize="20sp" />
    
            <View
                android:layout_width="0.5dp"
                android:layout_height="match_parent"
                android:background="#FE8B40" />
    
            <LinearLayout
                android:layout_width="60dp"
                android:layout_height="match_parent"
                android:gravity="center" >
    
                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:contentDescription="@null"
                    android:scaleType="fitCenter"
                    android:src="@drawable/dropdown" />
            </LinearLayout>
        </LinearLayout>
    
        <Button
            android:id="@+id/bb_fengqiang_dialog"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="hello word" />
    
    </LinearLayout>
    View Code

    第三个fragment

    package org.xml.demo.fragment;
    
    import ogg.huanxin.huadong.R;
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    
    public class PinPaiFragment extends Fragment {
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            return inflater.inflate(R.layout.pinpaifragment, container, false);
        }
    
        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);        
        }
    }
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  • 原文地址:https://www.cnblogs.com/wangfengdange/p/4978432.html
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