大家好,今天主要是實現仿大衆點評引導頁和主頁面以及城市定位的實現,主要使用ViewPager+Fragment+SharedPreferences,實現了第一次打開程序出現引導頁,再次打開跳過引導頁,這也是一般應用常用的應用基本架構方式。下面首先來看最終實現效果如下圖:
1.佈局文件說明
1)歡迎頁佈局文件welcome.xml
2) 引導頁佈局文件welcome_guide.xml
3)首頁佈局文件main_home.xml
4)團購佈局文件main_tuan.xml
5) 發現佈局文件main_search.xml
6) 我的佈局文件main_my.xml
佈局文件內容較多,佈局代碼就不一一貼出來了,請看附件詳細源碼。
2.Activity說明
1)歡迎頁Activity(WelcomeStartActivity)
package com.sunny.dianping_client; import java.util.Timer; import java.util.TimerTask; import com.sunny.dianping_client.utils.SharedUtils; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; public class WelcomeStartActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.welcome); //使用Handler實現延時跳轉 // new Handler(new Handler.Callback() { // // @Override // public boolean handleMessage(Message msg) { // // 頁面跳轉 // startActivity(new Intent(getApplicationContext(), MainActivity.class)); // return false; // } // }).sendEmptyMessageDelayed(0, 3000);//表示任務延時三秒執行 //使用Java定時器實現延時跳轉 Timer timer = new Timer(); timer.schedule(new Task(), 3000);//定時器延時執行任務的方法 } class Task extends TimerTask{ @Override public void run() { // 實現頁面的跳轉 //不是第一次啓動 if (SharedUtils.getWelcomeFlag(getBaseContext())) { startActivity(new Intent(getBaseContext(),MainActivity.class)); }else { startActivity(new Intent(WelcomeStartActivity.this, WelcomeGuideActivity.class)); //保存訪問記錄 SharedUtils.putWelcomeFlag(getBaseContext(), true); } finish(); } } }
2) 引導頁Activity(WelcomeGuideActivity)
package com.sunny.dianping_client; import java.util.ArrayList; import java.util.List; import com.lidroid.xutils.ViewUtils; import com.lidroid.xutils.view.annotation.ViewInject; import com.lidroid.xutils.view.annotation.event.OnClick; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.ImageView; public class WelcomeGuideActivity extends Activity { @ViewInject(R.id.btn_welcome_guide) private Button mComeIn; @ViewInject(R.id.id_welcome_pager) private ViewPager mViewPager; private List<View> list; @Override protected void onCreate(Bundle savedInstanceState) { // TODO 自動生成的方法存根 super.onCreate(savedInstanceState); setContentView(R.layout.welcome_guide); ViewUtils.inject(this); initViewPager(); } @OnClick(R.id.btn_welcome_guide) public void click(View view){ // 實現頁面的跳轉 startActivity(new Intent(getBaseContext(), MainActivity.class)); finish(); } //初始化ViewPager public void initViewPager(){ list = new ArrayList<View>(); ImageView iv = new ImageView(this); iv.setImageResource(R.drawable.guide_01); list.add(iv); ImageView iv1 = new ImageView(this); iv1.setImageResource(R.drawable.guide_02); list.add(iv1); ImageView iv2 = new ImageView(this); iv2.setImageResource(R.drawable.guide_03); list.add(iv2); mViewPager.setAdapter(new MyPagerAdapter()); //監聽ViewPager滑動效果 mViewPager.setOnPageChangeListener(new OnPageChangeListener() { //頁卡被選中的效果 @Override public void onPageSelected(int arg0) { if (arg0==2) { mComeIn.setVisibility(View.VISIBLE); }else { mComeIn.setVisibility(View.GONE); } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageScrollStateChanged(int arg0) { } }); } //定義ViewPager的適配器 class MyPagerAdapter extends PagerAdapter{ //計算需要多少Items顯示 @Override public int getCount() { return list.size(); } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0==arg1; } //初始化Item實例的方法 @Override public Object instantiateItem(ViewGroup container, int position) { container.addView(list.get(position)); return list.get(position); } //Item銷燬的方法 @Override public void destroyItem(ViewGroup container, int position, Object object) { /** * 銷燬Item的方法不使用系統定義銷燬Item的方法,而是使用我們自己定義的形式,將一個View對象從ViewPager中移除 */ //super.destroyItem(container, position, object); container.removeView(list.get(position)); } } }
3) 主頁面Activity(MainActivity)
package com.sunny.dianping_client; import com.lidroid.xutils.ViewUtils; import com.lidroid.xutils.view.annotation.ViewInject; import com.lidroid.xutils.view.annotation.event.OnClick; import com.sunny.dianping_client.fragment.FragmentHome; import com.sunny.dianping_client.fragment.FragmentMy; import com.sunny.dianping_client.fragment.FragmentSearch; import com.sunny.dianping_client.fragment.FragmentTuan; import android.os.Bundle; import android.app.Activity; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.Button; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.RadioGroup.OnCheckedChangeListener; import android.widget.Toast; public class MainActivity extends FragmentActivity implements OnCheckedChangeListener{ @ViewInject(R.id.main_bottom_tabs) private RadioGroup mGroup; @ViewInject(R.id.main_home) private RadioButton main_home; private FragmentManager fragmentManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); ViewUtils.inject(this); //初始化FragmentManager fragmentManager = getSupportFragmentManager(); //設置默認選中 main_home.setChecked(true); mGroup.setOnCheckedChangeListener(this); changeFragment(new FragmentHome(), false); } @Override public void onCheckedChanged(RadioGroup group, int checkedId) { // 選中不同的Fragment switch (checkedId) { case R.id.main_home://首頁 changeFragment(new FragmentHome(), true); break; case R.id.main_tuan://團購 changeFragment(new FragmentTuan(), true); break; case R.id.main_search://發現 changeFragment(new FragmentSearch(), true); break; case R.id.main_my://我的 changeFragment(new FragmentMy(), true); break; default: break; } } //切換不同的Fragment public void changeFragment(Fragment fragment,boolean isInit){ //開啓事物 FragmentTransaction beginTransaction = fragmentManager.beginTransaction(); beginTransaction.replace(R.id.main_content, fragment); if (!isInit) { //加上該段代碼Fragment就不會出現重影的效果 beginTransaction.addToBackStack(null); } beginTransaction.commit(); } }
3.主界面Fragment的實現
1)首頁Fragment(FragmentHome)
package com.sunny.dianping_client.fragment; import java.util.List; import com.lidroid.xutils.ViewUtils; import com.lidroid.xutils.view.annotation.ViewInject; import com.sunny.dianping_client.R; import com.sunny.dianping_client.utils.SharedUtils; import android.support.v4.app.Fragment; import android.content.Context; import android.content.Intent; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.provider.Settings; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; public class FragmentHome extends Fragment implements LocationListener{ @ViewInject(R.id.main_top_city) private TextView mTopcity; private String cityName; private LocationManager locationManager; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.main_home, container, false); ViewUtils.inject(this, view); //獲取數據並顯示 mTopcity.setText(SharedUtils.getCityName(getActivity())); return view; } @Override public void onStart() { super.onStart(); // 檢查GPS是否打開 checkGPSisOpen(); } //檢查Gps是否打開 private void checkGPSisOpen() { // 獲取當前LocationManager對象 locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE); boolean isOpen = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); if (!isOpen) { Intent intent = new Intent(); intent.setAction(Settings.ACTION_LOCATION_SOURCE_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivityForResult(intent, 0); } //開始定位 startLocation(); } //使用GPS定位的方法 private void startLocation() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 10, this); } //接收並處理消息 private Handler handler = new Handler(new Handler.Callback() { @Override public boolean handleMessage(Message msg) { if (msg.what==1) { mTopcity.setText(cityName); } return false; } }); //獲取對應位置的經緯度並且定位城市 private void updateWithNewLocation(Location location) { double lat = 0.0,lng = 0.0; if (location!=null) { lat = location.getLatitude(); lng = location.getLongitude(); Log.i("TAG", "經度是"+lat+"緯度是"+lng); }else { cityName = "無法獲取城市信息"; } //通過經緯度獲取地址 List<Address> list = null; Geocoder geocoder = new Geocoder(getActivity()); try { list = geocoder.getFromLocation(lat, lng, 2); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } if (list!=null&&list.size()>0) { for (int i = 0; i < list.size(); i++) { Address address = list.get(i); cityName = address.getLocality();//獲取城市 } } //發送空消息 handler.sendEmptyMessage(1); } //位置信息更改執行方法 @Override public void onLocationChanged(Location location) { // 更新當前的位置信息 updateWithNewLocation(location); } //狀態信息改變 @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } @Override public void onDestroy() { super.onDestroy(); //保存城市 SharedUtils.putCityName(getActivity(), cityName); //停止定位 stopLocation(); } //停止定位 private void stopLocation(){ locationManager.removeUpdates(this); } }
2)團購頁Fragment(FragmentTuan)
package com.sunny.dianping_client.fragment; import com.sunny.dianping_client.R; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class FragmentTuan extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.main_tuan, container, false); } }
3)發現頁Fragment(FragmentSearch)
package com.sunny.dianping_client.fragment; import com.sunny.dianping_client.R; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class FragmentSearch extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.main_search, container, false); } }
4)我的頁Fragment(FragmentMy)
package com.sunny.dianping_client.fragment; import com.sunny.dianping_client.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 FragmentMy extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.main_my, container, false); } }
4.使用SharedPreferences實現標記的寫入與讀取
package com.sunny.dianping_client.utils; import android.R.bool; import android.content.Context; import android.content.SharedPreferences.Editor; import android.widget.EditText; /** * 實現標記的寫入讀取 * @author sunnyhack */ public class SharedUtils { private static final String FILE_NAME = "dianping"; private static final String MODE_NAME = "welcome"; // 獲取flag標記值 public static boolean getWelcomeFlag(Context context) { return context.getSharedPreferences(FILE_NAME, context.MODE_PRIVATE) .getBoolean(MODE_NAME, false); } // 寫入flag標記值 public static void putWelcomeFlag(Context context, boolean isFirst) { Editor editor = context.getSharedPreferences(FILE_NAME, context.MODE_APPEND).edit(); editor.putBoolean(MODE_NAME, isFirst); editor.commit(); } // 寫入一個String類型的數據 public static void putCityName(Context context, String cityName) { Editor editor = context.getSharedPreferences(FILE_NAME, Context.MODE_APPEND).edit(); editor.putString("cityName", cityName); editor.commit(); } // 獲取String類型的值 public static String getCityName(Context context) { return context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE) .getString("cityName", "選擇城市"); } }
5.主界面按鈕圖片和文字的變色(主要使用選擇器實現)
1)字體顏色選擇器main_color_selector.xml
2)首頁圖片變色選擇器main_home_selector.xml
2)團購圖片變色選擇器main_tuan_selector.xml
2)發現圖片變色選擇器main_search_selector.xml
2)我的圖片變色選擇器main_my_selector.xml
以上就是引導頁和主界面的實現,記錄下來給大家分享,一起交流學習~~