Android数据库之Realm

• Realm

• 初始化
  // for realm
  RealmConfiguration realmConfiguration = new RealmConfiguration.Builder(this)
  .deleteRealmIfMigrationNeeded()
  .build();
  Realm.setDefaultConfiguration(realmConfiguration);

• 增
  mRealm = Realm.getDefaultInstance();
  mRealm.executeTransactionAsync(new Realm.Transaction() {
  @Override
  public void execute(Realm bgRealm) {
  ArticleSave articleSave = bgRealm.createObject(ArticleSave.class);
  articleSave.setDetail(mArticle.getDetail());
  articleSave.setTitle(mArticle.getTitle());
  articleSave.setIntr(mArticle.getIntr());
  articleSave.setImg(mArticle.getImg());
  }
  }, new Realm.Transaction.OnSuccess() {
  @Override
  public void onSuccess() {
  Snackbar.with(getApplicationContext())
  .text(getString(R.string.save_ok))
  .show(ArtDetailActivity.this);
  }
  }, new Realm.Transaction.OnError() {
  @Override
  public void onError(Throwable error) {
  Snackbar.with(getApplicationContext())
  .text(getString(R.string.save_error))
  .show(ArtDetailActivity.this);
  }
  });

• 删
  mRealm = Realm.getDefaultInstance();
  mRealm.executeTransaction(new Realm.Transaction() {
  @Override
  public void execute(Realm realm) {
  RealmResults results = realm.where(ArticleSave.class)
  .equalTo("title",mSaveAdapter.getItem(position).getTitle())
  .findAll();
  results.deleteFirstFromRealm();
  Log.d(TAG,"delete success");
  }
  });

• 改

• 查
  mRealm = Realm.getDefaultInstance();
  mRealm.executeTransaction(new Realm.Transaction() {
  @Override
  public void execute(Realm realm) {
  RealmQuery query = realm.where(ArticleSave.class);
  RealmResults result1 = query.findAll();
  fillData(result1);
  }
  });

• 关闭数据库
  if(mRealm != null)
  mRealm.close();