AndroidManifest  --------

<!-- 配置內容提供者 -->
<provider
android:name=".provider.MyContentProvider"
android:authorities="com.zking.phon.PERSON"
android:exported="true" />

 再寫一個類   ---繼承ContentProvider

         public class MyContentProvider extends ContentProvider

   再重寫幾個方法  ----

           public boolean 
 
onCreate() ;

           public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder);

           public String getType(Uri uri);

           public Uri insert(Uri uri, ContentValues values);

public int delete(Uri uri, String selection, String[] selectionArgs);

           public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs);

   再其他的app呼叫  ContentResolver

     //獲取內容訪問者
    cr = getContentResolver();
    uri = Uri.parse("content://com.zking.phon.PERSON/student");
    Cursor cursor=cr.query(uri,null,null,null,null);
    Log.i("ccc"
 
," sss" +cursor);    Toast.makeText(this, "hhh"+cursor, Toast.LENGTH_SHORT).show();
    while (cursor.moveToNext()){
      int id=cursor.getInt(cursor.getColumnIndex("_id"));
      String name=cursor.getString(cursor.getColumnIndex("name"));
      int age=cursor.getInt(cursor.getColumnIndex("age"));
       Log.i("ccc",id+" "+name+" "+age);
     }