add message provider.

diff --git a/app/src/main/java/com/enqualcomm/support/provider/FZDMessageProvider.java b/app/src/main/java/com/enqualcomm/support/provider/FZDMessageProvider.java
new file mode 100644 (file)
index 0000000..9cb60b3
--- /dev/null
+++ b/app/src/main/java/com/enqualcomm/support/provider/FZDMessageProvider.java
@@ -0,0 +1,103 @@
+package com.enqualcomm.support.provider;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+public class FZDMessageProvider extends ContentProvider {
+
+    //添加规则
+    private static final String PATH = "message";
+    private static final String AUTHORITY = "com.ic.fzd.we-talk";
+    private static final String MESSAGES = "content://" + AUTHORITY + "/" + PATH;
+
+    private FZDDatabaseHelper mDatabase;
+
+
+    private static final int MATH_CODE_TABLE = 1;
+
+    private static UriMatcher sUriMatcher;
+
+    static {
+        sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        sUriMatcher.addURI(AUTHORITY, PATH, MATH_CODE_TABLE);
+    }
+
+
+    @Override
+    public boolean onCreate() {
+        mDatabase = new FZDDatabaseHelper(getContext());
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Cursor query(@NonNull Uri uri,
+                        @Nullable String[] projection,
+                        @Nullable String selection,
+                        @Nullable String[] selectionArgs,
+                        @Nullable String sortOrder) {
+        int match = sUriMatcher.match(uri);
+        if (match == MATH_CODE_TABLE) {
+            //处理查询
+            SQLiteDatabase readableDatabase = mDatabase.getReadableDatabase();
+            return readableDatabase.query(FZDDatabaseHelper.tMessage, projection,
+                    selection, selectionArgs, sortOrder, null, null);
+        }
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public String getType(@NonNull Uri uri) {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public Uri insert(@NonNull Uri uri,
+                      @Nullable ContentValues values) {
+        int match = sUriMatcher.match(uri);
+        if (match == MATH_CODE_TABLE) {
+            SQLiteDatabase writableDatabase = mDatabase.getWritableDatabase();
+            //处理插入
+            long insert = writableDatabase.insert(FZDDatabaseHelper.tMessage, null, values);
+            writableDatabase.close();
+            return Uri.parse(AUTHORITY + "/" + PATH + "/" + insert);
+        }
+        return null;
+    }
+
+    @Override
+    public int delete(@NonNull Uri uri,
+                      @Nullable String selection,
+                      @Nullable String[] selectionArgs) {
+        int match = sUriMatcher.match(uri);
+        if (match == MATH_CODE_TABLE) {
+            //删除数据
+            SQLiteDatabase writableDatabase = mDatabase.getWritableDatabase();
+            int delete = writableDatabase.delete(FZDDatabaseHelper.tMessage, selection, selectionArgs);
+            writableDatabase.close();
+            return delete;
+        }
+        return 0;
+    }
+
+    @Override
+    public int update(@NonNull Uri uri, @Nullable ContentValues values, @Nullable String selection, @Nullable String[] selectionArgs) {
+        int match = sUriMatcher.match(uri);
+        if (match == MATH_CODE_TABLE) {
+            //更新数据
+            SQLiteDatabase writableDatabase = mDatabase.getWritableDatabase();
+            int update = writableDatabase.update(FZDDatabaseHelper.tMessage, values, selection, selectionArgs);
+            writableDatabase.close();
+            return update;
+        }
+        return 0;
+    }
+}