Android自定义布局的日历的例子

下面我们来看一篇关于Android自定义布局的日历的例子，希望这个例子能够帮助到各位朋友，有兴趣的同学可以进来看看吧。

系统自带的日历虽然好用，但是不符合某些项目的需求，所以需要自定义布局，看网上许多自定义View完成自定义日历的，

自认水平不够，无法驾驭，所以采用gridview来实现。

CalendarUtils:(获取当前年月对应的数据数组)

package kyle.com.zujian;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
 
/**
 * Created by kyle on 2016/8/12 0012.
 * 获取某年某月的日期,界面上第一天为周日
 * 通过传的年和月，获取对应年月的日期和第一天是周几
 */
public class CalendarUtils {
    private static int FIRST_DAY_OF_WEEK;//第一天
    private static Calendar calendar;//日历
 
 
    public static List<DateEntity> getDate(int year, int month) {
        if (year <= 0 || month < 1 || month > 12) {
            return new ArrayList<>();//当年和月不符合规则时，返回空list
        }
        List<DateEntity> dates = new ArrayList<>();
        calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR, year);//设置年
        calendar.set(Calendar.MONTH, month - 1);//设置月
        calendar.set(Calendar.DAY_OF_MONTH, 1);//设置第一天
        FIRST_DAY_OF_WEEK = calendar.get(Calendar.DAY_OF_WEEK) - 1;//获得第一天是周几 0:周日 6周六
        for (int i = 0; i < FIRST_DAY_OF_WEEK; i++) {//假设是周日则跳过，假设不是周日,就添加对应数目的空白item
            DateEntity entity = new DateEntity();
            dates.add(entity);
        }
        int count = checkDays(year, month);//获取当前年月的天数
        for (int i = 0; i < count; i++) {
            DateEntity entity2 = new DateEntity(year, month, i + 1);
            dates.add(entity2);
        }
        return dates;
    }
 
    /***
     * 判断当前年月有多少天
     *
     * @param year
     * @param month
     * @return
     */
    private static int checkDays(int year, int month) {
        if (year < 1 || month > 12 || month < 1) {
            return 0;
        }
        switch (month) {
            case 2:
                if (year % 4 == 0) {
                    return 29;
                } else {
                    return 28;
                }
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                return 31;
            case 4:
            case 6:
            case 9:
            case 11:
                return 30;
        }
        return 0;
    }
}

实体类:DateEntity

package kyle.com.zujian;
 
/**
 * Created by Administrator on 2016/8/9 0009.
 */
public class DateEntity {
    private int year;
    private int month;
    private int day;
 
    @Override
    public String toString() {
        return "DateEntity{" +
                "year=" + year +
                ", month=" + month +
                ", day=" + day +
                '}';
    }
 
    public DateEntity(){
 
}
    public DateEntity( int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }
 
 
    public int getYear() {
        return year;
    }
 
    public void setYear(int year) {
        this.year = year;
    }
 
    public int getMonth() {
        return month;
    }
 
    public void setMonth(int month) {
        this.month = month;
    }
 
    public int getDay() {
        return day;
    }
 
    public void setDay(int day) {
        this.day = day;
    }
}

CalendarGridView:(自定义的gridview,把代码转移到这里面，方便调用.)

package kyle.com.zujian;
 
import android.content.Context;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
 
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
 
/**
 * Created by kyle on 2016/8/15 0015.
 * 自定义日历gridview
 */
public class CalendarGridView extends GridView {
 
    private Context mContext;
    private List<DateEntity> mList = new ArrayList<>();
    private MyAdapter mAdapter;
    private Calendar calendar;
    /***
     * 今天
     */
    private int NOW_YEAR;//当前年
    private int NOW_MONTH;//当前月
    private int NOW_DAY;//当前日
 
    public CalendarGridView(Context context) {
        super(context, null);
        mContext = context;
    }
 
    public CalendarGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        calendar = Calendar.getInstance();//获取日历实例
        NOW_YEAR = calendar.get(Calendar.YEAR);//当前年
        NOW_MONTH = calendar.get(Calendar.MONTH) + 1;//当前月
        NOW_DAY = calendar.get(Calendar.DAY_OF_MONTH);//当前日
        mAdapter = new MyAdapter();//实例化和设置适配器
        setAdapter(mAdapter);
    }
 
    public void init(int year, int month) {
        if (year < 1 || month < 1 || month > 12) {
            Toast.makeText(mContext, "年份或月份错误!", Toast.LENGTH_SHORT).show();
            return;
        }
        mList.clear();
        for (DateEntity entity : CalendarUtils.getDate(year, month)) {
            mList.add(entity);
        }
        mAdapter.notifyDataSetChanged();
    }
 
    private class MyAdapter extends BaseAdapter {
 
        @Override
        public int getCount() {
            return mList.size();
        }
 
        @Override
        public Object getItem(int position) {
            return mList.get(position);
        }
 
        @Override
        public long getItemId(int position) {
            return position;
        }
 
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            MyHolder holder;
            if (convertView == null) {
                convertView = View.inflate(mContext, R.layout.item_grid, null);
                holder = new MyHolder();
                holder.llMain = (LinearLayout) convertView.findViewById(R.id.ll_main);
                holder.tvDate = (TextView) convertView.findViewById(R.id.tv_date);
                holder.tvCount = (TextView) convertView.findViewById(R.id.tv_count);
                convertView.setTag(holder);
            } else {
                holder = (MyHolder) convertView.getTag();
            }
            int year = mList.get(position).getYear();
            int month = mList.get(position).getMonth();
            int day = mList.get(position).getDay();
            if (year == NOW_YEAR && month == NOW_MONTH && day == NOW_DAY) {
                holder.llMain.setBackgroundResource(R.color.red);
                holder.tvDate.setTextColor(ContextCompat.getColor(mContext, R.color.white));
                holder.tvCount.setTextColor(ContextCompat.getColor(mContext, R.color.white));
            } else {
                holder.llMain.setBackgroundResource(R.color.white);
                holder.tvDate.setTextColor(ContextCompat.getColor(mContext, R.color.black));
                holder.tvCount.setTextColor(ContextCompat.getColor(mContext, R.color.black));
            }
            if (day != 0) {
                holder.tvDate.setText(mList.get(position).getDay() + "");
            } else {
                holder.tvDate.setText("");
            }
            return convertView;
        }
    }
 
    private class MyHolder {
        private LinearLayout llMain;
        private TextView tvDate;
        private TextView tvCount;
    }
}

在Activity里面这样调用:

CalendarGridView mGv= (CalendarGridView) findViewById(R.id.gv);
mGv.init(2016,8);
 

当然，布局和实体类都可以自己去根据需求写，而如果想要真正的日历功能，则可以使用viewpager+fragment实现了

下面我们来看一篇关于Android开发之底部导航实现总结，希望这篇文章能够帮助到各位朋友，有兴趣的同学可以和小编一起来看看吧。

底部导航有很多种实现方式。目前比较常用的是RadioGroup+Fragment，FragmentTabHost+Fragment，BottomNavigationBar三种方式，下面分别介绍：

一、RadioGroup+Fragment方式：这种方式是最老的实现方式，代码复杂。

1.布局：

<?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">
 
 <FrameLayout
 android:id="@+id/content"
 android:layout_width="match_parent"
 android:layout_height="0dp"
 android:layout_weight="1.0"
 android:background="@color/white" />
 
 <View
 android:layout_width="match_parent"
 android:layout_height="1dp"
 android:background="@color/view" />
 
 <RadioGroup
 android:id="@+id/group_home"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom"
 android:background="#4A192F"
 android:gravity="center_vertical"
 android:orientation="horizontal">
 
 <RadioButton
 android:id="@+id/radio_main"
 style="@style/home_tab_bottom"
 android:checked="true"
 android:drawableTop="@drawable/home_tab_main_selector"
 android:text="首页"
 android:textColor="@color/titlebar_bg"
 android:textSize="14sp" />
 
 <RadioButton
 android:id="@+id/radio_assortment"
 style="@style/home_tab_bottom"
 android:drawableTop="@drawable/home_tab_assortment_selector"
 android:text="分类"
 android:textColor="@color/white"
 android:textSize="14sp" />
 
 <RadioButton
 android:id="@+id/radio_car"
 style="@style/home_tab_bottom"
 android:drawableTop="@drawable/home_tab_car_selector"
 android:text="购物车"
 android:textColor="@color/white"
 android:textSize="14sp" />
 
 <RadioButton
 android:id="@+id/radio_recommend"
 style="@style/home_tab_bottom"
 android:drawableTop="@drawable/home_tab_recommend_selector"
 android:text="热榜"
 android:textColor="@color/white"
 android:textSize="14sp" />
 
 <RadioButton
 android:id="@+id/radio_my"
 style="@style/home_tab_bottom"
 android:drawableTop="@drawable/home_tab_my_selector"
 android:text="我的"
 android:textColor="@color/white"
 android:textSize="14sp" />
 
 </RadioGroup>
</LinearLayout>

2.java代码：

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.widget.RadioButton;
import android.widget.RadioGroup;
 
import cn.zmit.bottomnavigationdemo.R;
import cn.zmit.bottomnavigationdemo.fragment.FiveFragment;
import cn.zmit.bottomnavigationdemo.fragment.FourFragment;
import cn.zmit.bottomnavigationdemo.fragment.OneFragment;
import cn.zmit.bottomnavigationdemo.fragment.ThreeFragment;
import cn.zmit.bottomnavigationdemo.fragment.TwoFragment;
 
/**
 * Created by Administrator on 2016/8/9.
 * RadioGroup+Fragment
 */
public class OneActivity extends FragmentActivity {
 private RadioGroup mRadioGroup;
 
private RadioButton radio_main;//主页
 
private RadioButton radio_my;//我的
 
private RadioButton radio_assortment;//分类
 
private RadioButton radio_car;//购物车
 
private RadioButton radio_recommend;//热榜
 
private OneFragment mOneFragment;//主页
 private TwoFragment mTwoFragment;//分类
 private ThreeFragment mThreeFragment;//购物车
 private FourFragment mFourFragment;//热榜
 private FiveFragment mFiveFragment;//我的
 private FragmentManager fragmentManager;
 
@Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_one);
 fragmentManager = getSupportFragmentManager();
 init();//获取ID
 setTab(1);//设置首页为默认显示
 }
 
 /**
 * 获取ID
 */
 private RadioGroup.OnCheckedChangeListener onCheckedChangeListener;
 private int checkId;
 
private void init() {
 mRadioGroup = (RadioGroup) findViewById(R.id.group_home);
 radio_main = (RadioButton) findViewById(R.id.radio_main);
 radio_my = (RadioButton) findViewById(R.id.radio_my);
 radio_assortment = (RadioButton) findViewById(R.id.radio_assortment);
 radio_car = (RadioButton) findViewById(R.id.radio_car);
 radio_recommend = (RadioButton) findViewById(R.id.radio_recommend);
 onCheckedChangeListener = new RadioGroup.OnCheckedChangeListener() {
 @Override
 public void onCheckedChanged(RadioGroup group, int checkedId) {
 if (checkId != checkedId) {
 switch (checkedId) {
 case R.id.radio_main:
 setTab(1);
 changeTab(1);
 break;
 case R.id.radio_my:
 changeTab(5);
 setTab(5);
 break;
 case R.id.radio_assortment:
 changeTab(2);
 setTab(2);
 break;
 case R.id.radio_car:
 setTab(3);
 changeTab(3);
 break;
 case R.id.radio_recommend:
 setTab(4);
 changeTab(4);
 break;
 }
 }
 checkId = checkedId;
 }
 };
 mRadioGroup.setOnCheckedChangeListener(onCheckedChangeListener);
 }
 
/***
 * 切换tab时的变化
 *
 * @param i
 */
 private void changeTab(int i) {
 
switch (i) {
 case 1:
 radio_main.setTextColor(getResources().getColor(R.color.titlebar_bg));
 radio_my.setTextColor(getResources().getColor(R.color.white));
 radio_assortment.setTextColor(getResources().getColor(R.color.white));
 radio_recommend.setTextColor(getResources().getColor(R.color.white));
 radio_car.setTextColor(getResources().getColor(R.color.white));
 break;
 case 2:
 radio_main.setTextColor(getResources().getColor(R.color.white));
 radio_assortment.setTextColor(getResources().getColor(R.color.titlebar_bg));
 radio_my.setTextColor(getResources().getColor(R.color.white));
 radio_recommend.setTextColor(getResources().getColor(R.color.white));
 radio_car.setTextColor(getResources().getColor(R.color.white));
 
break;
 case 3:
 radio_main.setTextColor(getResources().getColor(R.color.white));
 radio_my.setTextColor(getResources().getColor(R.color.white));
 radio_car.setTextColor(getResources().getColor(R.color.titlebar_bg));
 radio_recommend.setTextColor(getResources().getColor(R.color.white));
 radio_assortment.setTextColor(getResources().getColor(R.color.white));
 break;
 case 4:
 radio_main.setTextColor(getResources().getColor(R.color.white));
 radio_my.setTextColor(getResources().getColor(R.color.white));
 radio_car.setTextColor(getResources().getColor(R.color.white));
 radio_recommend.setTextColor(getResources().getColor(R.color.titlebar_bg));
 radio_assortment.setTextColor(getResources().getColor(R.color.white));
 break;
 case 5:
 radio_main.setTextColor(getResources().getColor(R.color.white));
 radio_my.setTextColor(getResources().getColor(R.color.titlebar_bg));
 radio_car.setTextColor(getResources().getColor(R.color.white));
 radio_recommend.setTextColor(getResources().getColor(R.color.white));
 radio_assortment.setTextColor(getResources().getColor(R.color.white));
 break;
 }
 }
 
/***
 * 切换tab
 */
 private void setTab(int index) {
 FragmentTransaction transaction = fragmentManager.beginTransaction();
 hideFragments(transaction);
 switch (index) {
 case 1:
 if (mOneFragment == null) {
 mOneFragment = new OneFragment();
 transaction.add(R.id.content, mOneFragment);
 } else {
 transaction.show(mOneFragment);
 mOneFragment.setUserVisibleHint(true);
 }
 break;
 case 2:
 if (mTwoFragment == null) {
 mTwoFragment = new TwoFragment();
 transaction.add(R.id.content, mTwoFragment);
 } else {
 transaction.show(mTwoFragment);
 mTwoFragment.setUserVisibleHint(true);
 }
 break;
 case 3:
 if (mThreeFragment == null) {
 mThreeFragment = new ThreeFragment();
 transaction.add(R.id.content, mThreeFragment);
 } else {
 transaction.show(mThreeFragment);
 mThreeFragment.setUserVisibleHint(true);
 }
 break;
 case 4:
 if (mFourFragment == null) {
 mFourFragment = new FourFragment();
 transaction.add(R.id.content, mFourFragment);
 } else {
 transaction.show(mFourFragment);
 mFourFragment.setUserVisibleHint(true);
 }
 break;
 case 5:
 if (mFiveFragment == null) {
 mFiveFragment = new FiveFragment();
 transaction.add(R.id.content, mFiveFragment);
 } else {
 transaction.show(mFiveFragment);
 mFiveFragment.setUserVisibleHint(true);
 }
 break;
 }
 transaction.commit();
 }
 
private void hideFragments(FragmentTransaction transaction) {
 
if (mOneFragment != null) {
 transaction.hide(mOneFragment);
 }
 if (mTwoFragment != null) {
 transaction.hide(mTwoFragment);
 }
 if (mThreeFragment != null) {
 transaction.hide(mThreeFragment);
 }
 if (mFourFragment != null) {
 transaction.hide(mFourFragment);
 }
 if (mFiveFragment != null) {
 transaction.hide(mFiveFragment);
 }
 }
}
效果图：

RadioGroup+Fragment方式

二、FragmentTabHost+Fragment：现在常用的实现方式，代码相对简洁一些。

1.布局：

<?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" >
 
 <FrameLayout
 android:id="@+id/realtabcontent"
 android:layout_width="match_parent"
 android:layout_height="0dip"
 android:layout_weight="1" />
 
 <android.support.v4.app.FragmentTabHost
 android:id="@android:id/tabhost"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="#4A192F">
 
 <FrameLayout
 android:id="@android:id/tabcontent"
 android:layout_width="0dp"
 android:layout_height="0dp"
 android:layout_weight="0" />
 </android.support.v4.app.FragmentTabHost>
 
</LinearLayout>

tab_item_view布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
 
<ImageView
android:id="@+id/imageview"
android:layout_marginTop="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:padding="3dp"/>
 
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/tab_text"
android:textSize="14sp"/>
 
</LinearLayout>

2.java代码：

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;
 
import cn.zmit.bottomnavigationdemo.R;
import cn.zmit.bottomnavigationdemo.fragment.FiveFragment;
import cn.zmit.bottomnavigationdemo.fragment.FourFragment;
import cn.zmit.bottomnavigationdemo.fragment.OneFragment;
import cn.zmit.bottomnavigationdemo.fragment.ThreeFragment;
import cn.zmit.bottomnavigationdemo.fragment.TwoFragment;
 
/**
 * Created by Administrator on 2016/8/9.
 * FragmentTabHost+Fragment
 */
public class TwoActivity extends FragmentActivity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_two);
 initView();
 }
 
private FragmentTabHost mTabHost;
 
/**
 * 布局填充器
 *
 */
 private LayoutInflater mLayoutInflater;
 
/**
 * Fragment数组界面
 *
 */
 private Class mFragmentArray[] = { OneFragment.class, TwoFragment.class,
 ThreeFragment.class, FourFragment.class, FiveFragment.class };
 /**
 * 存放图片数组
 *
 */
 private int mImageArray[] = { R.drawable.home_tab_main_selector,
 R.drawable.home_tab_assortment_selector, R.drawable.home_tab_car_selector,
 R.drawable.home_tab_recommend_selector, R.drawable.home_tab_my_selector };
 
/**
 * 选修卡文字
 *
 */
 private String mTextArray[] = { "首页", "分类", "购物车", "热榜", "我的" };
 
/**
 * 初始化组件
 */
 private void initView() {
 mLayoutInflater = LayoutInflater.from(this);
 
// 找到TabHost
 mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
 mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
 // 得到fragment的个数
 int count = mFragmentArray.length;
 for (int i = 0; i &amp;amp;lt; count; i++) {
 // 给每个Tab按钮设置图标、文字和内容
 TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mTextArray[i])
 .setIndicator(getTabItemView(i));
 // 将Tab按钮添加进Tab选项卡中
 mTabHost.addTab(tabSpec, mFragmentArray[i], null);
 }
 }
 
/**
 *
 * 给每个Tab按钮设置图标和文字
 */
 private View getTabItemView(int index) {
 View view = mLayoutInflater.inflate(R.layout.tab_item_view, null);
 ImageView imageView = (ImageView) view.findViewById(R.id.imageview);
 imageView.setBackgroundResource(mImageArray[index]);
 TextView textView = (TextView) view.findViewById(R.id.textview);
 textView.setText(mTextArray[index]);
 return view;
 }
}

FragmentTabHost+Fragment方式

三、BottomNavigationBar：最新的实现方式。

在使用之前，需要在Android Studio

1.布局：

<?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">
 
 <FrameLayout
 android:id="@+id/layFrame"
 android:layout_width="match_parent"
 android:layout_height="0dp"
 android:layout_weight="1" />
 
 <com.ashokvarma.bottomnavigation.BottomNavigationBar
 android:id="@+id/bottom_navigation_bar"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom" />
 
</LinearLayout>

2.java代码：

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
 
import com.ashokvarma.bottomnavigation.BottomNavigationBar;
import com.ashokvarma.bottomnavigation.BottomNavigationItem;
 
import java.util.ArrayList;
 
import cn.zmit.bottomnavigationdemo.R;
import cn.zmit.bottomnavigationdemo.fragment.AssortmentFragment;
import cn.zmit.bottomnavigationdemo.fragment.CarFragment;
import cn.zmit.bottomnavigationdemo.fragment.MainFragment;
import cn.zmit.bottomnavigationdemo.fragment.MySpaceFragment;
import cn.zmit.bottomnavigationdemo.fragment.RecommendFragment;
 
/**
 * Created by Administrator on 2016/8/9.
 * BottomNavigationBar
 */
public class ThreeActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener {
 private ArrayList<Fragment> fragments;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_three);
 BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);
 bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED);
 bottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC);
 bottomNavigationBar.setBarBackgroundColor(R.color.bg);
 bottomNavigationBar.addItem(new BottomNavigationItem(R.drawable.home_tab_main_selector, "首页"))
 .addItem(new BottomNavigationItem(R.drawable.home_tab_assortment_selector, "分类"))
 .addItem(new BottomNavigationItem(R.drawable.home_tab_car_selector, "购物车"))
 .addItem(new BottomNavigationItem(R.drawable.home_tab_recommend_selector, "热榜"))
 .addItem(new BottomNavigationItem(R.drawable.home_tab_my_selector, "我的"))
 .setFirstSelectedPosition(0)
 .initialise();
 fragments = getFragments();
 setDefaultFragment();
 bottomNavigationBar.setTabSelectedListener(this);
 }
 
 /**
 * 设置默认的
 */
 private void setDefaultFragment() {
 FragmentManager fm = getSupportFragmentManager();
 FragmentTransaction transaction = fm.beginTransaction();
 transaction.replace(R.id.layFrame, MainFragment.newInstance("首页"));
 transaction.commit();
 }
 
 private ArrayList<Fragment> getFragments() {
 ArrayList<Fragment> fragments = new ArrayList<>();
 fragments.add(MainFragment.newInstance("首页"));
 fragments.add(AssortmentFragment.newInstance("分类"));
 fragments.add(CarFragment.newInstance("购物车"));
 fragments.add(RecommendFragment.newInstance("热榜"));
 fragments.add(MySpaceFragment.newInstance("我的"));
 return fragments;
 }
 
 @Override
 public void onTabSelected(int position) {
 if (fragments != null) {
 if (position < fragments.size()) {
 FragmentManager fm = getSupportFragmentManager();
 FragmentTransaction ft = fm.beginTransaction();
 Fragment fragment = fragments.get(position);
 if (fragment.isAdded()) {
 ft.replace(R.id.layFrame, fragment);
 } else {
 ft.add(R.id.layFrame, fragment);
 }
 ft.commitAllowingStateLoss();
 }
 }
 
 }
 
 @Override
 public void onTabUnselected(int position) {
 if (fragments != null) {
 if (position < fragments.size()) {
 FragmentManager fm = getSupportFragmentManager();
 FragmentTransaction ft = fm.beginTransaction();
 Fragment fragment = fragments.get(position);
 ft.remove(fragment);
 ft.commitAllowingStateLoss();
 }
 }
 }
 
 @Override
 public void onTabReselected(int position) {
 
 }
}

银行卡因为比较长所以在用户输入时我们最好格式化显示了这样可以防止输错银行卡了，今天我们来看一篇关于Android银行卡输入格式化程序吧，具体如下。

我们在输入银行卡号时希望能按格式显示，而不是单纯显示一堆数字，下面一段代码可实现银行卡号格式化输入。

//银行卡号码的格式
   public void bankCardNumAddSpace(final EditText mEditText) {
       mEditText.addTextChangedListener(new TextWatcher() {
           int beforeTextLength = 0;
           int onTextLength = 0;
           boolean isChanged = false;
 
           int location = 0;// 记录光标的位置
           private char[] tempChar;
           private StringBuffer buffer = new StringBuffer();
           int konggeNumberB = 0;
 
           @Override
           public void beforeTextChanged(CharSequence s, int start, int count,
                                         int after) {
               beforeTextLength = s.length();
               if (buffer.length() &gt; 0) {
                   buffer.delete(0, buffer.length());
               }
               konggeNumberB = 0;
               for (int i = 0; i &lt; s.length(); i++) {
                   if (s.charAt(i) == ' ') {
                       konggeNumberB++;
                   }
               }
           }
 
           @Override
           public void onTextChanged(CharSequence s, int start, int before,
                                     int count) {
               onTextLength = s.length();
               buffer.append(s.toString());
               if (onTextLength == beforeTextLength || onTextLength &lt;= 3
                       || isChanged) {
                   isChanged = false;
                   return;
               }
               isChanged = true;
           }
 
           @Override
           public void afterTextChanged(Editable s) {
               if (isChanged) {
                   location = mEditText.getSelectionEnd();
                   int index = 0;
                   while (index &lt; buffer.length()) {
                       if (buffer.charAt(index) == ' ') {
                           buffer.deleteCharAt(index);
                       } else {
                           index++;
                       }
                   }
 
                   index = 0;
                   int konggeNumberC = 0;
                   while (index &lt; buffer.length()) {
                       if ((index == 4 || index == 9 || index == 14 || index == 19)) {
                           buffer.insert(index, ' ');
                           konggeNumberC++;
                       }
                       index++;
                   }
 
                   if (konggeNumberC &gt; konggeNumberB) {
                       location += (konggeNumberC - konggeNumberB);
                   }
 
                   tempChar = new char[buffer.length()];
                   buffer.getChars(0, buffer.length(), tempChar, 0);
                   String str = buffer.toString();
                   if (location &gt; str.length()) {
                       location = str.length();
                   } else if (location &lt; 0) {
                       location = 0;
                   }
 
                   mEditText.setText(str);
                   Editable etable = mEditText.getText();
                   Selection.setSelection(etable, location);
                   isChanged = false;
               }
           }
       });
   }

下面我们就来看一篇关于Android常用跳转工具集合汇总，希望这篇文章能够让各位了解到android中常用跳转工具用法吧。

这里包含了一些基本的并且常用的跳转工具。

这是需要的对应的权限。

<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

代码：

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
 
import java.io.File;
 
import frame.zmit.cn.publicutils.R;
 
/**
 * Created by joy on 2016/7/21.
 * 工具集合
 */
public class MainActivity extends AppCompatActivity {
 private String mImagePath;//返回的图片路径
 private final static int REQUEST_CODE_GALLERY = 0x11;
 private final static int REQUEST_CODE_CAMERA = 0x12;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 /**
 * 打开微信
 */
 findViewById(R.id.btn_open_weixin).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = getPackageManager().getLaunchIntentForPackage("com.tencent.mm");
 startActivity(intent);
 }
 });
 /**
 * 跳转到QQ聊天界面
 */
 findViewById(R.id.btn_open_qq).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 String mQqNumber = "98*****08";
 String url11 = "mqqwpa://im/chat?chat_type=wpa&uin=" + mQqNumber + "&version=10";
 startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url11)));
 }
 });
 /**
 * 跳转到联系人界面
 */
 findViewById(R.id.btn_people_interface).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent();
 intent.setClassName("com.android.contacts", "com.android.contacts.activities.PeopleActivity");
 startActivity(intent);
 }
 });
 /**
 * 跳转到拨号界面
 */
 findViewById(R.id.btn_telephone_interface).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 String phone = "157*****737";
 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phone));
 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 startActivity(intent);
 }
 });
 /**
 * 直接拨打电话
 */
 findViewById(R.id.btn_telephone).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 String phone = "157*****737";
 Intent intentPhone = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phone));
 startActivity(intentPhone);
 }
 });
 /**
 * 跳转到短信界面
 */
 findViewById(R.id.btn_message_interface).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent(Intent.ACTION_VIEW);
 intent.setType("vnd.android-dir/mms-sms");
 startActivity(intent);
 }
 });
 /**
 * 跳转到短信界面
 * 指定号码和短信内容
 */
 findViewById(R.id.btn_message).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 String phone = "157*****737";
 String message = "这是一个自定义的内容";
 Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("smsto:" + phone));
 intent.putExtra("sms_body", message);
 startActivity(intent);
 }
 });
 /**
 * 跳转到设置界面
 */
 findViewById(R.id.btn_setting_interface).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent(Settings.ACTION_SETTINGS);
 startActivity(intent);
 }
 });
 /**
 * 跳转到蓝牙界面
 */
 findViewById(R.id.btn_bluetooth_interface).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent(Settings.ACTION_BLUETOOTH_SETTINGS);
 startActivity(intent);
 }
 });
 /**
 * 调用浏览器
 */
 findViewById(R.id.btn_browser).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent();
 intent.setAction("android.intent.action.VIEW");
 Uri content_url = Uri.parse("http://www.baidu.com");
 intent.setData(content_url);
 startActivity(intent);
 }
 });
 /**
 * 打开照相机
 */
 findViewById(R.id.btn_camera).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 mImagePath = chooseImageFromCamera(MainActivity.this, REQUEST_CODE_CAMERA, "cameraImage");
 }
 });
 /**
 * 打开相册并获取图片地址
 */
 findViewById(R.id.btn_gallery).setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent(Intent.ACTION_PICK, null);
 intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
 startActivityForResult(intent, REQUEST_CODE_GALLERY);
 }
 });
 }
 
 public String chooseImageFromCamera(Activity activity, int requestCode, String imageName) {
 Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
 File file = new File(Environment.getExternalStorageDirectory() + "/Images");
 if (!file.exists()) {
 file.mkdirs();
 }
 String savePath = Environment.getExternalStorageDirectory() + "/Images/" + imageName + String.valueOf(System.currentTimeMillis()) + ".jpg";
 Uri mUri = Uri.fromFile(
 new File(savePath));
 cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, mUri);
 cameraIntent.putExtra("return-data", true);
 activity.startActivityForResult(cameraIntent, requestCode);
 return savePath;
 }
 
 public String onActivityResultForChooseImageFromGallery(
 Context context, int requestCode, int resultCode, Intent data) {
 String imagePath = null;
 if (data != null) {
 if ("file".equals(data.getData().getScheme())) {
 /** 有些低版本机型返回的Uri模式为file*/
 imagePath = data.getData().getPath();
 } else {
 Uri selectedImage = data.getData();
 String[] filePathColumn = {MediaStore.Images.Media.DATA};
 
 Cursor cursor = context.getContentResolver().query(selectedImage,
 filePathColumn, null, null, null);
 cursor.moveToFirst();
 
 int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
 imagePath = cursor.getString(columnIndex);
 cursor.close();
 }
 return imagePath;
 } else {
 return null;
 }
 
 }
 
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 switch (requestCode) {
 case REQUEST_CODE_GALLERY:
 mImagePath = onActivityResultForChooseImageFromGallery(MainActivity.this,
 requestCode, resultCode, data);
 if (mImagePath != null && mImagePath.length() > 0) {
 Toast.makeText(MainActivity.this, mImagePath, Toast.LENGTH_SHORT).show();
 }
 break;
 case REQUEST_CODE_CAMERA:
 if (mImagePath != null && mImagePath.length() > 0) {
 Toast.makeText(MainActivity.this, mImagePath, Toast.LENGTH_SHORT).show();
 }
 break;
 }
 }
}