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January 27, 2018 03:06
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android sqlite 参数化查询
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/* | |
* Copyright (C) 2016 The Android Open Source Project | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License | |
*/ | |
package com.android.contacts.group; | |
import android.content.Context; | |
import android.content.Intent; | |
import android.database.Cursor; | |
import android.net.Uri; | |
import android.os.AsyncTask; | |
import android.provider.ContactsContract; | |
import android.provider.ContactsContract.RawContacts; | |
import android.widget.Toast; | |
import com.android.contacts.ContactSaveService; | |
import com.android.contacts.R; | |
import com.android.contacts.activities.PeopleActivity; | |
/** | |
* Starts an Intent to add/remove the raw contacts for the given contact IDs to/from a group. | |
* Only the raw contacts that belong to the specified account are added or removed. | |
*/ | |
public class UpdateGroupMembersAsyncTask extends AsyncTask<Void, Void, Intent> { | |
static final int TYPE_ADD = 0; | |
static final int TYPE_REMOVE = 1; | |
private final Context mContext; | |
private final int mType; | |
private final long[] mContactIds; | |
private final long mGroupId; | |
private final String mAccountName; | |
private final String mAccountType; | |
private final String mDataSet; | |
public UpdateGroupMembersAsyncTask(int type, Context context, long[] contactIds, | |
long groupId, String accountName, String accountType, String dataSet) { | |
mContext = context; | |
mType = type; | |
mContactIds = contactIds; | |
mGroupId = groupId; | |
mAccountName = accountName; | |
mAccountType = accountType; | |
mDataSet = dataSet; | |
} | |
@Override | |
protected Intent doInBackground(Void... params) { | |
final long[] rawContactIds = getRawContactIds(); | |
if (rawContactIds.length == 0) { | |
return null; | |
} | |
final long[] rawContactIdsToAdd; | |
final long[] rawContactIdsToRemove; | |
final String action; | |
if (mType == TYPE_ADD) { | |
rawContactIdsToAdd = rawContactIds; | |
rawContactIdsToRemove = null; | |
action = GroupUtil.ACTION_ADD_TO_GROUP; | |
} else if (mType == TYPE_REMOVE) { | |
rawContactIdsToAdd = null; | |
rawContactIdsToRemove = rawContactIds; | |
action = GroupUtil.ACTION_REMOVE_FROM_GROUP; | |
} else { | |
throw new IllegalStateException("Unrecognized type " + mType); | |
} | |
return ContactSaveService.createGroupUpdateIntent( | |
mContext, mGroupId, /* newLabel */ null, rawContactIdsToAdd, | |
rawContactIdsToRemove, PeopleActivity.class, action); | |
} | |
// TODO(wjang): prune raw contacts that are already in the group; ContactSaveService will | |
// log a warning if the raw contact is already a member and keep going but it is not ideal. | |
private long[] getRawContactIds() { | |
final Uri.Builder builder = RawContacts.CONTENT_URI.buildUpon(); | |
// null account names are not valid, see ContactsProvider2#appendAccountFromParameter | |
if (mAccountName != null) { | |
builder.appendQueryParameter(RawContacts.ACCOUNT_NAME, mAccountName); | |
builder.appendQueryParameter(RawContacts.ACCOUNT_TYPE, mAccountType); | |
} | |
if (mDataSet != null) { | |
builder.appendQueryParameter(RawContacts.DATA_SET, mDataSet); | |
} | |
final Uri rawContactUri = builder.build(); | |
final String[] projection = new String[]{ContactsContract.RawContacts._ID}; | |
final StringBuilder selection = new StringBuilder(); | |
final String[] selectionArgs = new String[mContactIds.length]; | |
for (int i = 0; i < mContactIds.length; i++) { | |
if (i > 0) { | |
selection.append(" OR "); | |
} | |
selection.append(ContactsContract.RawContacts.CONTACT_ID).append("=?"); | |
selectionArgs[i] = Long.toString(mContactIds[i]); | |
} | |
final Cursor cursor = mContext.getContentResolver().query( | |
rawContactUri, projection, selection.toString(), selectionArgs, null, null); | |
final long[] rawContactIds = new long[cursor.getCount()]; | |
try { | |
int i = 0; | |
while (cursor.moveToNext()) { | |
rawContactIds[i] = cursor.getLong(0); | |
i++; | |
} | |
} finally { | |
cursor.close(); | |
} | |
return rawContactIds; | |
} | |
@Override | |
protected void onPostExecute(Intent intent) { | |
if (intent == null) { | |
Toast.makeText(mContext, R.string.groupSavedErrorToast, Toast.LENGTH_SHORT).show(); | |
} else { | |
mContext.startService(intent); | |
} | |
} | |
} |
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