ZF_BreathLampProvider（ContentProvider）

最新推荐文章于 2024-08-01 09:28:45 发布

原创最新推荐文章于 2024-08-01 09:28:45 发布 · 217 阅读

CC 4.0 BY-SA版权

本文介绍了一个用于管理Android设备上呼吸灯应用数据的ContentProvider实现。该Provider通过ZF_BreathLampDBHelper与数据库交互，支持基本的CRUD操作。主要功能包括：查询appinfo表中的记录。

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package com.android.settings.breathlamp;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.net.Uri;

public class ZF_BreathLampProvider extends ContentProvider{
private ZF_BreathLampDBHelper dbHelper = null;
private SQLiteDatabase db = null;
public static UriMatcher matcher = new UriMatcher(UriMatcher.NO_MATCH);
public static final int BLACK_COLLECTION = 0;

static {
    matcher.addURI("com.android.settings.breathlamp.Provider",
            "appinfo", BLACK_COLLECTION);
}

@Override
public boolean onCreate() {
    dbHelper = new ZF_BreathLampDBHelper(getContext());
    return true;
}

@Override
public Cursor query(Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {
    Cursor cursor = null;
    switch (matcher.match(uri)) {
    case BLACK_COLLECTION:
        db = dbHelper.getWritableDatabase();
        cursor = db.query("appinfo", projection, selection, selectionArgs, null, null, null);
        return cursor;

    default:
        throw new SQLiteException("uri wrong ,query fialed");
    }
}

@Override
public String getType(Uri uri) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public Uri insert(Uri uri, ContentValues values) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public int update(Uri uri, ContentValues values, String selection,
        String[] selectionArgs) {
    // TODO Auto-generated method stub
    return 0;
}

}