Android中使用ContentProvider管理系統資源的執行個體_Android

ContentProvider管理連絡人的執行個體：

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) {       // 擷取程式介面中的桑文字框       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();       // 建立一個空的ContentValue       ContentValues values = new ContentValues();       // 向RawContacts.CONTNT_URI執行一個空值插入       // 目的是擷取系統返回的rawContactId       Uri rawContactsUri = getContentResolver().insert(           RawContacts.CONTENT_URI, values);       long rawContactId = ContentUris.parseId(rawContactsUri);       values.clear();       values.put(Data.RAW_CONTACT_ID, rawContactId);       // 設定內容類型       values.put(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE);       // 設定連絡人名字       values.put(StructuredName.GIVEN_NAME, name);       // 向連絡人Uri新增連絡人...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);       // 設定連絡人的電話       values.put(Phone.NUMBER, phone);       // 設定電話類型       values.put(Phone.TYPE, Phone.TYPE_MOBILE);       // 向連絡人電話Uri添加電話號碼       getContentResolver().insert(           android.provider.ContactsContract.Data.CONTENT_URI, values);       values.clear();       values.put(Data.RAW_CONTACT_ID, rawContactId);       values.put(Data.MIMETYPE, Email.CONTENT_ITEM_TYPE);       // 設定連絡人的email地址       values.put(Email.DATA, email);       // 設定email的類型       values.put(Email.TYPE, Email.TYPE_WORK);       getContentResolver().insert(           android.provider.ContactsContract.Data.CONTENT_URI, values);       Toast.makeText(MainActivity.this, "新增連絡人...資訊成功", Toast.LENGTH_LONG)           .show();      }    }    class LookPresonClick implements OnClickListener {      @Override     public void onClick(View v) {       // 定義兩個List來封裝系統連絡人資訊，指定連絡人的電話，email等詳情       final ArrayList<String> names = new ArrayList<String>();       final ArrayList<ArrayList<String>> details = new ArrayList<ArrayList<String>>();       // 使用ContentResolver尋找連絡人資料       Cursor cursor = getContentResolver().query(           ContactsContract.Contacts.CONTENT_URI, null, null, null,           null);       // 遍曆結果 擷取系統所有連絡人資訊       while (cursor.moveToNext()) {         // 擷取連絡人ID         String contactid = cursor.getString(cursor             .getColumnIndex(ContactsContract.Contacts._ID));         // 擷取連絡人的名字         String name = cursor             .getString(cursor                 .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));         names.add(name);         // 使用ContentResolver尋找連絡人的電話號碼         Cursor phones = getContentResolver().query(             ContactsContract.CommonDataKinds.Phone.CONTENT_URI,             null,             ContactsContract.CommonDataKinds.Phone.CONTACT_ID                 + "= ?", new String[] { contactid }, null);         ArrayList<String> detail = new ArrayList<String>();         // 遍曆查詢結果，擷取該連絡人的多個電話         while (phones.moveToNext()) {           // 擷取查詢的結果中的電話號碼列           String phoneNumber = phones               .getString(phones                   .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));           detail.add("電話號碼是：" + phoneNumber);         }         phones.close();         // 使用ContentResolver尋找連絡人的E-mail地址         Cursor emails = getContentResolver().query(             ContactsContract.CommonDataKinds.Email.CONTENT_URI,             null,             ContactsContract.CommonDataKinds.Email.CONTACT_ID                 + " =?", new String[] { contactid }, null);         // 遍曆查詢結果，擷取該連絡人的多個email地址         while (emails.moveToNext()) {           // 擷取查詢的結果中email地址中列的資料           String emailAddress = emails               .getString(emails                   .getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));           detail.add("email是:" + emailAddress);         }         emails.close();         details.add(detail);        }       cursor.close();        // 載入result.xml介面布局代表的視圖       View resultDialog = getLayoutInflater().inflate(R.layout.result,           null);       exp1 = (ExpandableListView) resultDialog.findViewById(R.id.exp1);       // 建立一個ExpandableListAdapter對象       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, 0, 0);           textview.setTextSize(20);           return textview;         }          @Override         public View getChildView(int groupPosition, int childPosition,             boolean isLastChild, View convertView, 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);       // 使用對話方塊來顯示查詢結果       new AlertDialog.Builder(MainActivity.this).setView(resultDialog)           .setPositiveButton("確定", 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="輸入連絡人姓名"/>     <EditText        android:id="@+id/ed2"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:hint="輸入連絡人電話"/>     <EditText        android:id="@+id/ed3"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:hint="輸入連絡人email"/>     <Button        android:id="@+id/bt2"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:text="新增連絡人...資訊"/>   <Button     android:id="@+id/bt1"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:text="查看連絡人" />   </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管理多媒體內容
Android為多媒體提供的Uri:
1、MediaStore.Audio.Mdia.EXTERNAL_CONTENT_URI：儲存在外部裝置上的音頻檔案
2、MediaStore.Audio.Mdia.INTERNAL_CONTENT_URI：儲存在手機內部上的音頻檔案
3、MediaStore.Images.Mdia.EXTERNAL_CONTENT_URI：儲存在外部裝置上的圖片檔案
4、MediaStore.Images.Mdia.INTERNAL_CONTENT_URI：儲存在內部裝置上的圖片檔案
5、MediaStore.Video.Mdia.EXTERNAL_CONTENT_URI：儲存在外部裝置上的音頻檔案
6、MediaStore.Video.Mdia.INTERNAL_CONTENT_URI：儲存在內部裝置上的音頻檔案
執行個體：

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集合裡原有的資料         names.clear();         descs.clear();         filenames.clear();         // 通過ContentResolver查詢所有圖片資訊         Cursor curos = getContentResolver().query(             Media.EXTERNAL_CONTENT_URI, null, null, null, null);         while (curos.moveToNext()) {           // 擷取圖片顯示的名字           String name = curos.getString(curos               .getColumnIndex(Media.DISPLAY_NAME));           // 擷取圖片的詳細資料、           String desc = curos.getString(curos               .getColumnIndex(Media.DESCRIPTION));           // 將圖片名儲存的位置資料           byte[] data = curos.getBlob(curos               .getColumnIndex(Media.DATA));           // 將圖片名添加到names集合中           names.add(name);           // 將圖片描述添加到desc集合中           descs.add(desc);           // 將圖片儲存路徑添加到fileNames集合中           filenames.add(new String(data, 0, data.length - 1));         }         // 建立一個List集合的元素是map         List<Map<String, Object>> listitems = new ArrayList<Map<String, Object>>();         // 將names、descs兩個集合對象的資料轉換到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) {         // 載入view.xml介面布局代表視圖         View view = getLayoutInflater().inflate(R.layout.view, null);         // 擷取viewDialog中ImageView組件         ImageView image1 = (ImageView) view.findViewById(R.id.image1);         // 設定image顯示指定的圖片         image1.setImageBitmap(BitmapFactory.decodeFile(filenames             .get(arg2)));         // 使用對話方塊顯示使用者單擊的圖片         new AlertDialog.Builder(MainActivity.this).setView(view)             .setPositiveButton("確定", null).show();        }     });     bt2.setOnClickListener(new OnClickListener() {        @Override       public void onClick(View v) {         // 建立ContentValues對象，準備插入資料         ContentValues values = new ContentValues();         values.put(Media.DISPLAY_NAME, "jinta");         values.put(Media.DESCRIPTION, "金塔");         values.put(Media.MIME_TYPE, "image/jpeg");         // 插入資料對應的Uri         Uri uri = getContentResolver().insert(             Media.EXTERNAL_CONTENT_URI, values);         // 載入應用程式下的jinta圖片         Bitmap bitmap = BitmapFactory.decodeResource(             MainActivity.this.getResources(), R.drawable.jinta);         OutputStream os = null;         try {           // 擷取剛插入的資料的Uri對應的輸出資料流           os = getContentResolver().openOutputStream(uri);           // 將bitmap圖片儲存到Uri對應的資料節點中           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="查看圖片"/>   <Button      android:id="@+id/bt2"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:text="添加圖片"/>   <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>