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目标效果:
1.程序所需素材:http://pan.baidu.com/s/1kV3y1Cz
2.新建项目,在res目录下新建raw文件夹,将素材中idioms.db数据库复制到该文件夹下,这是因为raw文件夹中的东西,android会原封不动的拷贝到程序中,而不会转换为二进制文件。
3.src目录下新建七个包,adapter包用于存放适配器,activity包用于存放页面活动相关的代码,dao包用于存放数据操作相关的代码,db包用于数据库相关的代码,util包用于存放所有工具相关的代码,test包用于存放单元测试类,entity用于存放实体类。
4.首先在strings.xml页面定义所需要的文本信息。
strings.xml页面:
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">happyidiom</string> <string name="action_settings">Settings</string> <string name="title_study">学习</string> <string name="title_search">搜搜</string> <string name="title_game">游戏</string> <string name="title_save">收藏</string> <string name="title_help">帮助</string> <string name="animal">动物类</string> <string-array name="category"> <item>动物类</item> <item>自然类</item> <item>人物类</item> <item>季节类</item> <item>数字类</item> <item>寓言类</item> <item>其它类</item> </string-array> </resources>
<?xml version="1.0" encoding="utf-8"?> <alpha xmlns:android="http://schemas.android.com/apk/res/android" android:duration="1000" android:fromAlpha="0.0" android:toAlpha="1.0"> </alpha>
<?xml version="1.0" encoding="utf-8"?> <layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android" android:animation="@anim/anim_listview" android:animationOrder="random" android:delay="0.2"> </layoutAnimation>
<?xml version="1.0" encoding="utf-8"?> <!-- “学习”中ListView的子布局 --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp" android:orientation="horizontal" > <ImageView android:id="@+id/category_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/category_animal"/> <TextView android:id="@+id/category_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/animal" android:gravity="center" android:textColor="#000000" android:textAppearance="?android:attr/textAppearanceLarge"/> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <!-- 成语列表布局 --> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:descendantFocusability="blocksDescendants" android:padding="10dp" > <!-- android:descendantFocusability="blocksDescendants"使ListView中的子控件ImageButton失去焦点 --> <TextView android:id="@+id/tvName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:gravity="center" android:textColor="#000000" android:text="助人为乐" android:textAppearance="?android:attr/textAppearanceLarge"/> <ImageButton android:id="@+id/btnSave" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@null" android:layout_alignParentRight="true" android:layout_alignTop="@+id/tvName" android:src="@drawable/btnsave"/> </RelativeLayout>
<!-- 对话框布局 --> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:baselineAligned="@drawable/bg_ling" android:orientation="vertical"> <TextView android:id="@+id/tvIdiomInfo" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Medium Text" android:textAppearance="?android:attr/textAppearanceMedium"/> </LinearLayout> </ScrollView>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bg_ling" tools:context=".StudyActivity" > <ListView android:id="@+id/lvCategories" android:layout_width="match_parent" android:layout_height="wrap_content" android:listSelector="#00000000" android:layoutAnimation="@anim/anim_layout_listview" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" > </ListView> </RelativeLayout>
<?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:background="@drawable/bg_animal" android:orientation="vertical" > <ListView android:id="@+id/lvAnimalList" android:layout_width="match_parent" android:layout_height="wrap_content" android:layoutAnimation="@anim/anim_layout_listview" android:listSelector="#00000000"> </ListView> </LinearLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <TabHost android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TabWidget android:id="@android:id/tabs" android:layout_width="match_parent" android:layout_height="wrap_content" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:id="@+id/tab1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > </LinearLayout> <LinearLayout android:id="@+id/tab2" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > </LinearLayout> <LinearLayout android:id="@+id/tab3" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > </LinearLayout> </FrameLayout> </LinearLayout> </TabHost> </RelativeLayout>
package cn.edu.bztc.happyidiom.entity; public class Category { private String name; private int imageId; public Category(String name, int imageId) { super(); this.name = name; this.imageId = imageId; } public String getName() { return name; } public int getImageId() { return imageId; } }
package cn.edu.bztc.happyidiom.entity; public class Animal { private int id; private String name;//成语名称 private String pronounce;//成语发音 private String explain;//成语解释 private String antonym;//反义词 private String homoionym;//同义词 private String derivation;//源自 private String examples;//例子 public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPronounce() { return pronounce; } public void setPronounce(String pronounce) { this.pronounce = pronounce; } public String getExplain() { return explain; } public void setExplain(String explain) { this.explain = explain; } public String getAntonym() { return antonym; } public void setAntonym(String antonym) { this.antonym = antonym; } public String getHomoionym() { return homoionym; } public void setHomoionym(String homoionym) { this.homoionym = homoionym; } public String getDerivation() { return derivation; } public void setDerivation(String derivation) { this.derivation = derivation; } public String getExamples() { return examples; } public void setExamples(String examples) { this.examples = examples; } }
package cn.edu.bztc.happyidiom.db; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import cn.edu.bztc.happyidion.activity.R; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.os.Environment; import android.util.Log; /*实现将数据库文件从raw目录拷贝到手机里存放数据库的位置*/ public class DBOpenHelper { private final int BUFFER_SIZE=400000;//缓冲区大小 public static final String DB_NAME="idioms.db";//保存的数据库文件名 public static final String PACKAGE_NAME="cn.edu.bztc.happyidion.activity";//应用的包名 public static final String DB_PATH="/data"+Environment.getDataDirectory().getAbsolutePath()+"/"+PACKAGE_NAME+"/databases";//在手机里存放数据库的位置 private Context context; public DBOpenHelper(Context context){ this.context=context; } public SQLiteDatabase openDatabase(){ try { File myDataPath=new File(DB_PATH); if(!myDataPath.exists()){ myDataPath.mkdirs();//如果没有这个目录则创建 } String dbfile=myDataPath+"/"+DB_NAME; if(!(new File(dbfile).exists())){//判断数据库文件是否存在,如果不存在则执行导入,否则直接打开数据库 InputStream is=context.getResources().openRawResource(R.raw.idioms); FileOutputStream fos=new FileOutputStream(dbfile); byte[] buffer=new byte[BUFFER_SIZE]; int count=0; while((count=is.read(buffer))>0){ fos.write(buffer,0,count); } fos.close(); is.close(); } SQLiteDatabase db=SQLiteDatabase.openOrCreateDatabase(dbfile,null); return db; } catch (FileNotFoundException e) { Log.e("MainActivity","File not found"); e.printStackTrace(); }catch (IOException e) { Log.e("MainActivity","IO exception"); e.printStackTrace(); } return null; } }
package cn.edu.bztc.happyidiom.test; import cn.edu.bztc.happyidiom.db.DBOpenHelper; import android.test.AndroidTestCase; public class DBOpenHelperTest extends AndroidTestCase{ public void testDBCopy(){ DBOpenHelper dbOpenHelper=new DBOpenHelper(getContext()); dbOpenHelper.openDatabase(); } }
<uses-library android:name="android.test.runner"/>
<instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="cn.edu.bztc.happyidion.activity"></instrumentation>
package cn.edu.bztc.happyidiom.dao; import java.util.ArrayList; import java.util.List; import cn.edu.bztc.happyidiom.db.DBOpenHelper; import cn.edu.bztc.happyidiom.entity.Animal; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; public class AnimalDao { private static AnimalDao animaiDao; private SQLiteDatabase db; /*将构造方法私有化*/ private AnimalDao(Context context){ DBOpenHelper dbHelper=new DBOpenHelper(context); db=dbHelper.openDatabase(); } /*获取AnimalDao的实例*/ public synchronized static AnimalDao getInstance(Context context){ if(animaiDao==null){ animaiDao=new AnimalDao(context); } return animaiDao; } /*从数据库读取所有的动物类成语*/ public List<Animal> getAllAnimals(){ List<Animal> list=new ArrayList<Animal>(); Cursor cursor=db.query("animal",null,null,null,null,null,null); if(cursor.moveToNext()){ do{ Animal animal=new Animal(); animal.setId(cursor.getInt(cursor.getColumnIndex("_id"))); animal.setName(cursor.getString(cursor.getColumnIndex("name"))); animal.setPronounce(cursor.getString(cursor.getColumnIndex("pronounce"))); animal.setAntonym(cursor.getString(cursor.getColumnIndex("antonym"))); animal.setHomoionym(cursor.getString(cursor.getColumnIndex("homoionym"))); animal.setDerivation(cursor.getString(cursor.getColumnIndex("derivation"))); animal.setExamples(cursor.getString(cursor.getColumnIndex("examples"))); animal.setExplain(cursor.getString(cursor.getColumnIndex("explain"))); list.add(animal); }while(cursor.moveToNext()); } return list; } }
package cn.edu.bztc.happyidiom.test; import java.util.List; import cn.edu.bztc.happyidiom.dao.AnimalDao; import cn.edu.bztc.happyidiom.entity.Animal; import android.test.AndroidTestCase; public class AnimalDaoTest extends AndroidTestCase{ public void testGetAllAnimals(){ AnimalDao animalDao=AnimalDao.getInstance(getContext()); List<Animal> animals=animalDao.getAllAnimals(); System.out.println(animals.size()); for(Animal animal:animals){ System.out.println(animal.getName()); } } }
package cn.edu.bztc.happyidiom.adapter; import java.util.List; import cn.edu.bztc.happyidiom.entity.Category; import cn.edu.bztc.happyidion.activity.R; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.webkit.WebView.FindListener; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.TextView; public class CategoryAdapter extends ArrayAdapter<Category>{ private int resourceId; public CategoryAdapter(Context context, int resource, List<Category> categoryList) { super(context,resource, categoryList); resourceId=resource; } public View getView(int position, android.view.View convertView, android.view.ViewGroup parent) { Category category=getItem(position);//获取当前项的Category实例 View view; ViewHolder viewHolder; if(convertView==null){ view=LayoutInflater.from(getContext()).inflate(resourceId,null); viewHolder=new ViewHolder(); viewHolder.categoryImage=(ImageView)view.findViewById(R.id.category_image); viewHolder.categoryName=(TextView)view.findViewById(R.id.category_name); view.setTag(viewHolder); }else{ view=convertView; viewHolder=(ViewHolder) view.getTag(); } viewHolder.categoryImage.setImageResource(category.getImageId()); viewHolder.categoryName.setText(category.getName()); return view; } class ViewHolder{ ImageView categoryImage; TextView categoryName; } }
package cn.edu.bztc.happyidiom.adapter; import java.util.List; import cn.edu.bztc.happyidiom.entity.Animal; import cn.edu.bztc.happyidion.activity.R; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.webkit.WebView.FindListener; import android.widget.ArrayAdapter; import android.widget.ImageButton; import android.widget.TextView; import android.widget.Toast; public class AnimalAdapter extends ArrayAdapter<Animal>{ private int resourceId; private Context context; public AnimalAdapter(Context context, int resource,List<Animal> objects) { super(context,resource, objects); this.context=context; resourceId=resource; } @Override public View getView(int position, View convertView, ViewGroup parent) { final Animal animal =getItem(position);//获取当前项的Animal实例 View view; ViewHolder viewHolder; if(convertView==null){//判断是否第一次运行,如果是则进入,并将上下文环境保存进convertView view=LayoutInflater.from(getContext()).inflate(resourceId,null); viewHolder=new ViewHolder(); viewHolder.tvName=(TextView)view.findViewById(R.id.tvName); viewHolder.btnSave=(ImageButton)view.findViewById(R.id.btnSave); viewHolder.btnSave.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { Toast.makeText(context,"你要收藏"+animal.getName()+"吗",Toast.LENGTH_SHORT).show(); } }); view.setTag(viewHolder); }else{//如果不是第一次运行,convertView不为空,直接取出赋值给view view=convertView; viewHolder=(ViewHolder) view.getTag(); } viewHolder.tvName.setText(animal.getName());//显示成语 return view; } class ViewHolder{ TextView tvName; ImageButton btnSave; } }
package cn.edu.bztc.happyidiom.util; import cn.edu.bztc.happyidion.activity.R; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.Context; import android.content.DialogInterface; import android.view.LayoutInflater; import android.view.View; import android.widget.TextView; public class DialogUtil { public static void showDialog(String result,Context context){ AlertDialog.Builder builder=new AlertDialog.Builder(context); LayoutInflater layoutInflater=LayoutInflater.from(context); View view=layoutInflater.inflate(R.layout.dialog_info,null); builder.setView(view); TextView tvdiomInfo=(TextView)view.findViewById(R.id.tvIdiomInfo); tvdiomInfo.setText(result);//设置之前定义的提示语句 builder.setPositiveButton("确定",new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss();//对话框关闭 } }); builder.create().show();//打开对话框 } }
package cn.edu.bztc.happyidion.activity; import android.app.TabActivity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.Window; import android.widget.TabHost; public class MainActivity extends TabActivity{ private TabHost tabHost;//导航栏控件 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE);//取消标题栏 setContentView(R.layout.activity_main); tabHost=getTabHost(); //获取TabHost实例 /*一个Tab对应一个name名称,一个标题,一个图标,yigeActivity页面*/ addTab("study",R.string.title_study,R.drawable.study,StudyActivity.class); addTab("search",R.string.title_search,R.drawable.search,StudyActivity.class); addTab("game",R.string.title_game,R.drawable.game,StudyActivity.class); addTab("save",R.string.title_save,R.drawable.save,StudyActivity.class); addTab("help",R.string.title_help,R.drawable.help,StudyActivity.class); } /*定义每个Tab的显示内容*/ private void addTab(String tag,int title_introduction,int title_icon,Class ActivityClass){ tabHost.addTab(tabHost.newTabSpec(tag).setIndicator(getString(title_introduction),getResources().getDrawable(title_icon)).setContent(new Intent(this,ActivityClass))); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } }
package cn.edu.bztc.happyidion.activity; import java.util.ArrayList; import java.util.List; import cn.edu.bztc.happyidiom.adapter.CategoryAdapter; import cn.edu.bztc.happyidiom.entity.Category; import android.app.Activity; import android.content.Intent; import android.content.res.Resources; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import android.widget.Toast; public class StudyActivity extends Activity { private List<Category> categoryList; private String[] category_names; private int[] category_images; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_study); initCategories(); CategoryAdapter adapter=new CategoryAdapter(this,R.layout.category_item,categoryList); ListView listView=(ListView) findViewById(R.id.lvCategories); listView.setAdapter(adapter);//绑定适配器 listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapter, View view, int position, long id) { switch (position) {//position为0代表动物类 case 0: Intent intent=new Intent(StudyActivity.this,StudyAnimalActivity.class); startActivity(intent); break; default: break; } } }); } private void initCategories() { categoryList = new ArrayList<Category>(); Resources resources = getResources(); /*获取数据源*/ category_names = resources.getStringArray(R.array.category); category_images = new int[] { R.drawable.category_animal, R.drawable.category_nature, R.drawable.category_human, R.drawable.category_season, R.drawable.category_number, R.drawable.category_fable, R.drawable.category_other }; for(int i=0;i<category_names.length;i++){ categoryList.add(new Category(category_names[i],category_images[i])); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main,menu); return true; } }
package cn.edu.bztc.happyidion.activity; import java.util.List; import cn.edu.bztc.happyidiom.adapter.AnimalAdapter; import cn.edu.bztc.happyidiom.dao.AnimalDao; import cn.edu.bztc.happyidiom.entity.Animal; import cn.edu.bztc.happyidiom.util.DialogUtil; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import android.widget.Toast; public class StudyAnimalActivity extends Activity{ private List<Animal> animalList; private AnimalDao animalDao; private ListView lvAnimalList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_animal); initAnimals(); lvAnimalList=(ListView)findViewById(R.id.lvAnimalList); AnimalAdapter animalAdapter=new AnimalAdapter(this,R.layout.animal_item,animalList); lvAnimalList.setAdapter(animalAdapter); lvAnimalList.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) { Animal animal=animalList.get(position); /*定义对话框中提示语句*/ String result=animal.getName()+"\n"+ animal.getPronounce()+ "\n【解释】:"+animal.getExplain()+ "\n【近义词】:"+animal.getHomoionym()+ "\n【反义词】:"+animal.getAntonym()+ "\n【来源】:"+animal.getDerivation()+ "\n【示例】:"+animal.getExamples(); DialogUtil.showDialog(result,StudyAnimalActivity.this); } }); } /*获取成语数据*/ private void initAnimals() { animalDao=AnimalDao.getInstance(this); animalList=animalDao.getAllAnimals(); } }
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原文地址:http://blog.csdn.net/hester_hester/article/details/51582815