在android中从数据库中获取时复制数据

Question

嘿伙计们我正在研究数据库首先我从json获取数据并在网络不可用之后插入数据库然后从数据库中显示值它们是好的但是从数据库值中获取数据时是重复的

代码是活动

 private void parseData(JSONArray array) {
    for (int i = 0; i < array.length(); i++) {
        VideoJson model = new VideoJson();
        JSONObject json = null;
        try {
            json = array.getJSONObject(i);
            String vedio_name = json.getString(Config.TAG_VIDEO_TEXT);
            String vedio_url = json.getString(Config.TAG_VIDEO_URL);
            String vedio_img = json.getString(Config.TAG_VIDEO_IMAGE);
            model.setName_video(vedio_name);
            model.setImageUrl_video(vedio_url);
            model.setVedio_thambnail(vedio_img);
            Log.e("name","is =>"+vedio_name);
            Log.e("url","is =>"+vedio_url);
            Log.e("image","is =>"+vedio_img);
            db.addVideos(model);
            Log.e("database","value is"+db);
        } catch (JSONException e) {
            e.printStackTrace();
         }

并在数据库中插入值

public class VideoDataBase extends SQLiteOpenHelper {

    private static final int DB_VERSION = 4;
    private static final String DB_NAME = "appname";
    private static final String TABLE_VIDEOS= "videos";

private static final String KEY_VIDEO_ID = "video_id";
private static final String KEY_VIDEO_NAME = "video_id_text";
private static final String KEY_VIDEO_URL ="video_id_url";
private static final String KEY_VIDEO_THUMBNAIL ="video_thumb";



private static final String CREATE_TABLE_VIDEO = "CREATE TABLE "
            + TABLE_VIDEOS
            + " ( "
            + KEY_VIDEO_ID + " INTEGER PRIMARY KEY, "
            + KEY_VIDEO_NAME + " TEXT, "
            + KEY_VIDEO_URL + " TEXT, "
            + KEY_VIDEO_THUMBNAIL + " TEXT) ";
    public VideoDataBase(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE_VIDEO);
        Log.e("table name","==>"+CREATE_TABLE_VIDEO);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(TextDataBase.class.getName(),
                "Upgrading database from version " + oldVersion + " to "
                        + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_VIDEOS);
        onCreate(db);
    }

public void addVideos(VideoJson model){
    SQLiteDatabase db = this.getWritableDatabase();
        try{
            ContentValues values = new ContentValues();
            values.put(KEY_VIDEO_NAME, model.getName_video());
            values.put(KEY_VIDEO_URL,  model.getImageUrl_video());
            values.put(KEY_VIDEO_THUMBNAIL,  model.getVedio_thambnail());
            db.insert(TABLE_VIDEOS, null, values);
            Log.e("this db","value is"+values);
            db.close();
        }catch (Exception e){
            Log.e("problem",e+"");
        }
}

    public List<VideoJson> getAllVideos() {
        SQLiteDatabase db = this.getReadableDatabase();
        List<VideoJson> videoList = null;
        try{
            videoList = new ArrayList<VideoJson>();
            String QUERY = "SELECT * FROM "+TABLE_VIDEOS;
            Cursor cursor = db.rawQuery(QUERY, null);
            if(!cursor.isLast())
            {
                while (cursor.moveToNext())
                {
                    VideoJson videolist = new VideoJson();
                    videolist.setVideo_id(cursor.getInt(0));
                    videolist.setName_video(cursor.getString(1));
                    videolist.setImageUrl_video(cursor.getString(2));
                    videolist.setVedio_thambnail(cursor.getString(3));

                    videoList.add(videolist);
                }
            }
            db.close();
        }catch (Exception e){
            Log.e("error",e+"");
        }
        return videoList;
    }

数据库

input.html

Answer 1

尝试在插入前删除db表。

private void parseData(JSONArray array) {

 db.deleteTABLE_VIDEOS();

for (int i = 0; i < array.length(); i++) {
    VideoJson model = new VideoJson();
    JSONObject json = null;
    try {
        json = array.getJSONObject(i);
        String vedio_name = json.getString(Config.TAG_VIDEO_TEXT);
        String vedio_url = json.getString(Config.TAG_VIDEO_URL);
        String vedio_img = json.getString(Config.TAG_VIDEO_IMAGE);
        model.setName_video(vedio_name);
        model.setImageUrl_video(vedio_url);
        model.setVedio_thambnail(vedio_img);
        Log.e("name","is =>"+vedio_name);
        Log.e("url","is =>"+vedio_url);
        Log.e("image","is =>"+vedio_img);
        db.addVideos(model);
        Log.e("database","value is"+db);
    } catch (JSONException e) {
        e.printStackTrace();
     }