Android中使用ContentProvider管理系统资源的实例

概述ContentProvider管理联系人的实例：packagecom.android.xiong.getsystemcontentprovidertest;importjava.util.ArrayList;

ContentProvIDer管理联系人的实例：

package com.androID.xiong.getsystemcontentprovIDertest;  import java.util.ArrayList;  import androID.app.Activity; import androID.app.AlertDialog; import androID.content.ContentUris; import androID.content.ContentValues; import androID.database.Cursor; import androID.net.Uri; import androID.os.Bundle; import androID.provIDer.ContactsContract; import androID.provIDer.ContactsContract.CommonDataKinds.Email; import androID.provIDer.ContactsContract.CommonDataKinds.Phone; import androID.provIDer.ContactsContract.CommonDataKinds.Structuredname; import androID.provIDer.ContactsContract.Data; import androID.provIDer.ContactsContract.RawContacts; import androID.vIEw.Gravity; import androID.vIEw.Menu; import androID.vIEw.VIEw; import androID.vIEw.VIEw.OnClickListener; import androID.vIEw.VIEwGroup; import androID.Widget.AbsListVIEw; import androID.Widget.AbsListVIEw.LayoutParams; import androID.Widget.Baseexpandablelistadapter; import androID.Widget.button; import androID.Widget.EditText; import androID.Widget.expandablelistadapter; import androID.Widget.ExpandableListVIEw; import androID.Widget.TextVIEw; import androID.Widget.Toast;  public class MainActivity extends Activity {    private button bt1,bt2;   private ExpandableListVIEw exp1;    @OverrIDe   protected voID onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentVIEw(R.layout.activity_main);     bt1 = (button) findVIEwByID(R.ID.bt1);     bt1.setonClickListener(new LookPresonClick());     bt2 = (button) findVIEwByID(R.ID.bt2);     bt2.setonClickListener(new AddPersonClick());    }    class AddPersonClick implements OnClickListener {      @OverrIDe     public voID onClick(VIEw v) {       // 获取程序界面中的桑文本框       String name = ((EditText) findVIEwByID(R.ID.ed1)).getText()           .toString();       String phone = ((EditText) findVIEwByID(R.ID.ed2)).getText()           .toString();       String email = ((EditText) findVIEwByID(R.ID.ed3)).getText()           .toString();       // 创建一个空的ContentValue       ContentValues values = new ContentValues();       // 向RawContacts.CONTNT_URI执行一个空值插入       // 目的是获取系统返回的rawContactID       Uri rawContactsUri = getContentResolver().insert(           RawContacts.CONTENT_URI,values);       long rawContactID = ContentUris.parseID(rawContactsUri);       values.clear();       values.put(Data.RAW_CONTACT_ID,rawContactID);       // 设置内容类型       values.put(Data.MIMETYPE,Structuredname.CONTENT_ITEM_TYPE);       // 设置联系人名字       values.put(Structuredname.GIVEN_name,name);       // 向联系人Uri添加联系人名字       getContentResolver().insert(           androID.provIDer.ContactsContract.Data.CONTENT_URI,values);       values.clear();       values.put(Data.RAW_CONTACT_ID,rawContactID);       values.put(Data.MIMETYPE,Phone.CONTENT_ITEM_TYPE);       // 设置联系人的电话       values.put(Phone.NUMBER,phone);       // 设置电话类型       values.put(Phone.TYPE,Phone.TYPE_MOBILE);       // 向联系人电话Uri添加电话号码       getContentResolver().insert(           androID.provIDer.ContactsContract.Data.CONTENT_URI,Email.CONTENT_ITEM_TYPE);       // 设置联系人的email地址       values.put(Email.DATA,email);       // 设置email的类型       values.put(Email.TYPE,Email.TYPE_WORK);       getContentResolver().insert(           androID.provIDer.ContactsContract.Data.CONTENT_URI,values);       Toast.makeText(MainActivity.this,"添加联系人信息成功",Toast.LENGTH_LONG)           .show();      }    }    class LookPresonClick implements OnClickListener {      @OverrIDe     public voID onClick(VIEw v) {       // 定义两个List来封装系统联系人信息，指定联系人的电话，email等详情       final ArrayList<String> names = new ArrayList<String>();       final ArrayList<ArrayList<String>> details = new ArrayList<ArrayList<String>>();       // 使用ContentResolver查找联系人数据       Cursor cursor = getContentResolver().query(           ContactsContract.Contacts.CONTENT_URI,null,null);       // 遍历结果 获取系统所有联系人信息       while (cursor.movetoNext()) {         // 获取联系人ID         String contactID = cursor.getString(cursor             .getColumnIndex(ContactsContract.Contacts._ID));         // 获取联系人的名字         String name = cursor             .getString(cursor                 .getColumnIndex(ContactsContract.Contacts.disPLAY_name));         names.add(name);         // 使用ContentResolver查找联系人的电话号码         Cursor phones = getContentResolver().query(             ContactsContract.CommonDataKinds.Phone.CONTENT_URI,ContactsContract.CommonDataKinds.Phone.CONTACT_ID                 + "= ?",new String[] { contactID },null);         ArrayList<String> detail = new ArrayList<String>();         // 遍历查询结果，获取该联系人的多个电话         while (phones.movetoNext()) {           // 获取查询的结果中的电话号码列           String phoneNumber = phones               .getString(phones                   .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));           detail.add("电话号码是：" + phoneNumber);         }         phones.close();         // 使用ContentResolver查找联系人的E-mail地址         Cursor emails = getContentResolver().query(             ContactsContract.CommonDataKinds.Email.CONTENT_URI,ContactsContract.CommonDataKinds.Email.CONTACT_ID                 + " =?",null);         // 遍历查询结果，获取该联系人的多个email地址         while (emails.movetoNext()) {           // 获取查询的结果中email地址中列的数据           String emailAddress = emails               .getString(emails                   .getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));           detail.add("email是:" + emailAddress);         }         emails.close();         details.add(detail);        }       cursor.close();        // 加载result.xml界面布局代表的视图       VIEw resultDialog = getLayoutInflater().inflate(R.layout.result,null);       exp1 = (ExpandableListVIEw) resultDialog.findVIEwByID(R.ID.exp1);       // 创建一个expandablelistadapter对象       expandablelistadapter adapter = new Baseexpandablelistadapter() {          @OverrIDe         public boolean isChildSelectable(int groupposition,int childposition) {           // Todo auto-generated method stub           return true;         }          @OverrIDe         public boolean hasStableIDs() {           // Todo auto-generated method stub           return true;         }          @OverrIDe         public VIEw getGroupVIEw(int groupposition,boolean isExpanded,VIEw convertVIEw,VIEwGroup parent) {           TextVIEw text = getTextVeiw();           text.setText(getGroup(groupposition).toString());           return text;         }          @OverrIDe         public long getGroupID(int groupposition) {           // Todo auto-generated method stub           return groupposition;         }          @OverrIDe         public int getGroupCount() {           // Todo auto-generated method stub           return names.size();         }          @OverrIDe         public Object getGroup(int groupposition) {           // Todo auto-generated method stub           return names.get(groupposition);         }          @OverrIDe         public int getChildrenCount(int groupposition) {           // Todo auto-generated method stub           return details.get(groupposition).size();         }          private TextVIEw getTextVeiw() {           AbsListVIEw.LayoutParams lp = new LayoutParams(               VIEwGroup.LayoutParams.MATCH_PARENT,64);           TextVIEw textvIEw = new TextVIEw(MainActivity.this);           textvIEw.setLayoutParams(lp);           textvIEw.setGravity(Gravity.CENTER_VERTICAL | Gravity.left);           textvIEw.setpadding(36,0);           textvIEw.setTextSize(20);           return textvIEw;         }          @OverrIDe         public VIEw getChildVIEw(int groupposition,int childposition,boolean isLastChild,VIEwGroup parent) {           TextVIEw textvIEw = getTextVeiw();           textvIEw.setText(getChild(groupposition,childposition)               .toString());            return textvIEw;         }          @OverrIDe         public long getChildID(int groupposition,int childposition) {           // Todo auto-generated method stub           return childposition;         }          @OverrIDe         public Object getChild(int groupposition,int childposition) {           return details.get(groupposition).get(childposition);         }       };       exp1.setAdapter(adapter);       // 使用对话框来显示查询结果       new AlertDialog.Builder(MainActivity.this).setVIEw(resultDialog)           .setPositivebutton("确定",null).show();     }    }    @OverrIDe   public boolean onCreateOptionsMenu(Menu menu) {     // Inflate the menu; this adds items to the action bar if it is present.     getMenuInflater().inflate(R.menu.main,menu);     return true;   }  } 

<linearLayout 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:orIEntation="vertical"   tools:context=".MainActivity" >      <EditText      androID:ID="@+ID/ed1"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"     androID:hint="输入联系人姓名"/>     <EditText        androID:ID="@+ID/ed2"       androID:layout_wIDth="match_parent"       androID:layout_height="wrap_content"       androID:hint="输入联系人电话"/>     <EditText        androID:ID="@+ID/ed3"       androID:layout_wIDth="match_parent"       androID:layout_height="wrap_content"       androID:hint="输入联系人email"/>     <button        androID:ID="@+ID/bt2"       androID:layout_wIDth="match_parent"       androID:layout_height="wrap_content"       androID:text="添加联系人信息"/>   <button     androID:ID="@+ID/bt1"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"     androID:text="查看联系人" />   </linearLayout> 

<?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" >       <ExpandableListVIEw     androID:ID="@+ID/exp1"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content" >   </ExpandableListVIEw> </linearLayout> 

使用ContentProvIDer管理多媒体内容
AndroID为多媒体提供的Uri:
1、MediaStore.Audio.Mdia.EXTERNAL_CONTENT_URI：存储在外部设备上的音频文件
2、MediaStore.Audio.Mdia.INTERNAL_CONTENT_URI：存储在手机内部上的音频文件
3、MediaStore.Images.Mdia.EXTERNAL_CONTENT_URI：存储在外部设备上的图片文件
4、MediaStore.Images.Mdia.INTERNAL_CONTENT_URI：存储在内部设备上的图片文件
5、MediaStore.VIDeo.Mdia.EXTERNAL_CONTENT_URI：存储在外部设备上的音频文件
6、MediaStore.VIDeo.Mdia.INTERNAL_CONTENT_URI：存储在内部设备上的音频文件
实例：

package com.example.mediaprovIDertest;  import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;  import androID.app.Activity; import androID.app.AlertDialog; import androID.content.ContentValues; import androID.database.Cursor; import androID.graphics.Bitmap; import androID.graphics.BitmapFactory; import androID.net.Uri; import androID.os.Bundle; import androID.provIDer.MediaStore.Images.Media; import androID.vIEw.Menu; import androID.vIEw.VIEw; import androID.vIEw.VIEw.OnClickListener; import androID.Widget.AdapterVIEw; import androID.Widget.AdapterVIEw.OnItemClickListener; import androID.Widget.button; import androID.Widget.ImageVIEw; import androID.Widget.ListVIEw; import androID.Widget.SimpleAdapter; import androID.Widget.TextVIEw;  public class MainActivity extends Activity {    private button bt1,bt2;   private ListVIEw List1;    ArrayList<String> names = new ArrayList<String>();   ArrayList<String> descs = new ArrayList<String>();   ArrayList<String> filenames = new ArrayList<String>();    @OverrIDe   protected voID onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentVIEw(R.layout.activity_main);     bt1 = (button) findVIEwByID(R.ID.bt1);     bt2 = (button) findVIEwByID(R.ID.bt2);     List1 = (ListVIEw) findVIEwByID(R.ID.List);      bt1.setonClickListener(new OnClickListener() {        @OverrIDe       public voID onClick(VIEw v) {         // 清空names、desc、filename集合里原有的数据         names.clear();         descs.clear();         filenames.clear();         // 通过ContentResolver查询所有图片信息         Cursor curos = getContentResolver().query(             Media.EXTERNAL_CONTENT_URI,null);         while (curos.movetoNext()) {           // 获取图片显示的名字           String name = curos.getString(curos               .getColumnIndex(Media.disPLAY_name));           // 获取图片的详细信息、           String desc = curos.getString(curos               .getColumnIndex(Media.DESCRIPTION));           // 将图片名保存的位置数据           byte[] data = curos.getBlob(curos               .getColumnIndex(Media.DATA));           // 将图片名添加到names集合中           names.add(name);           // 将图片描述添加到desc集合中           descs.add(desc);           // 将图片保存路径添加到filenames集合中           filenames.add(new String(data,data.length - 1));         }         // 创建一个List集合的元素是map         List<Map<String,Object>> Listitems = new ArrayList<Map<String,Object>>();         // 将names、descs两个集合对象的数据转换到map集合         for (int i = 0; i < names.size(); i++) {           Map<String,Object> Listitem = new HashMap<String,Object>();           Listitem.put("name",names.get(i));           Listitem.put("desc",descs.get(i));           Listitems.add(Listitem);         }         SimpleAdapter simple = new SimpleAdapter(MainActivity.this,Listitems,R.layout.items,new String[] { "name","desc" },new int[] { R.ID.txt1,R.ID.txt2 });         List1.setAdapter(simple);        }     });     List1.setonItemClickListener(new OnItemClickListener() {        @OverrIDe       public voID onItemClick(AdapterVIEw<?> arg0,VIEw arg1,int arg2,long arg3) {         // 加载vIEw.xml界面布局代表视图         VIEw vIEw = getLayoutInflater().inflate(R.layout.vIEw,null);         // 获取vIEwDialog中ImageVIEw组件         ImageVIEw image1 = (ImageVIEw) vIEw.findVIEwByID(R.ID.image1);         // 设置image显示指定的图片         image1.setimageBitmap(BitmapFactory.decodefile(filenames             .get(arg2)));         // 使用对话框显示用户单击的图片         new AlertDialog.Builder(MainActivity.this).setVIEw(vIEw)             .setPositivebutton("确定",null).show();        }     });     bt2.setonClickListener(new OnClickListener() {        @OverrIDe       public voID onClick(VIEw v) {         // 创建ContentValues对象，准备插入数据         ContentValues values = new ContentValues();         values.put(Media.disPLAY_name,"jinta");         values.put(Media.DESCRIPTION,"金塔");         values.put(Media.MIME_TYPE,"image/jpeg");         // 插入数据对应的Uri         Uri uri = getContentResolver().insert(             Media.EXTERNAL_CONTENT_URI,values);         // 加载应用程序下的jinta图片         Bitmap bitmap = BitmapFactory.decodeResource(             MainActivity.this.getResources(),R.drawable.jinta);         OutputStream os = null;         try {           // 获取刚插入的数据的Uri对应的输出流           os = getContentResolver().openOutputStream(uri);           // 将bitmap图片保存到Uri对应的数据节点中           bitmap.compress(Bitmap.CompressFormat.JPEG,100,os);           os.close();         } catch (IOException io) {           io.printstacktrace();         }       }     });   }    @OverrIDe   public boolean onCreateOptionsMenu(Menu menu) {     // Inflate the menu; this adds items to the action bar if it is present.     getMenuInflater().inflate(R.menu.main,menu);     return true;   }  } 

<linearLayout 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:orIEntation="vertical"   tools:context=".MainActivity" >      <button      androID:ID="@+ID/bt1"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"     androID:text="查看图片"/>   <button      androID:ID="@+ID/bt2"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"     androID:text="添加图片"/>   <ListVIEw      androID:ID="@+ID/List"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"></ListVIEw>    </linearLayout> 

<?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" >   <TextVIEw      androID:ID="@+ID/txt1"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"/>   <TextVIEw      androID:ID="@+ID/txt2"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"/>     </linearLayout> 

<?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" >      <ImageVIEw       androID:ID="@+ID/image1"       androID:layout_wIDth="match_parent"       androID:layout_height="match_parent" />  </linearLayout> 

 

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