下面列出了怎么用android.content.AsyncQueryHandler的API类实例代码及写法，或者点击链接到github查看源代码。
public void addDirectory(String dir, AddDirectoryListener addDirectoryListener)
{
AsyncQueryHandler handler = new AsyncQueryHandler(mContext.getContentResolver())
{
@Override
protected void onInsertComplete(int token, Object cookie, Uri uri)
{
addDirectoryListener.onDirectoryAdded();
}
};
ContentValues file = new ContentValues();
file.put(GameDatabase.KEY_FOLDER_PATH, dir);
handler.startInsert(0, // We don't need to identify this call to the handler
null, // We don't need to pass additional data to the handler
GameProvider.URI_FOLDER, // Tell the GameProvider we are adding a folder
file);
}
/**
* 初始化数据
*/
public void initialData() {
new AsyncQueryHandler(getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie,
Cursor cursor) {
list = new ArrayList<>();
while (cursor.moveToNext()) {
String main = cursor.getString(cursor.getColumnIndex("main"));
String user = cursor.getString(cursor.getColumnIndex("user"));
String nickname = cursor.getString(cursor.getColumnIndex("nickname"));
String icon = cursor.getString(cursor.getColumnIndex("icon"));
int type = cursor.getInt(cursor.getColumnIndex("type"));
String content = cursor.getString(cursor.getColumnIndex("content"));
String sex = cursor.getString(cursor.getColumnIndex("sex"));
String too = cursor.getString(cursor.getColumnIndex("too"));
String times = cursor.getString(cursor.getColumnIndex("time"));
long time = Long.parseLong(times);
int viewType = cursor.getInt(cursor.getColumnIndex("viewtype"));
XmppChat xm = new XmppChat(main, user, nickname, icon, type, content, sex, too, viewType, time);
Log.i("chat》》》》》》》》》》》", too + "\n" + user.toLowerCase());
list.add(xm);
}
adapter = new ChatAdapter();
msgListView.setAdapter(adapter);
msgListView.setSelection(adapter.getCount() - 1);
}
}.startQuery(0, null, XmppFriendMessageProvider.CONTENT_CHATS_URI, null,
"main=?", new String[]{user.getUser() + xf.getUser().getUser()}, null);
}
private void injectLayout() {
// for panel
mSlidingPaneLayout = (SlidingPaneLayout) findViewById(R.id.sliding_pane_layout);
mEmotions = (GridView) findViewById(R.id.emotions);
mEmotions.setAdapter(new EmotionsAdapter(this));
mEmotions.setOnItemClickListener(this);
mSlidingPaneLayout.setPanelSlideListener(new SliderListener());
mSlidingPaneLayout.openPane();
mSlidingPaneLayout.getViewTreeObserver().addOnGlobalLayoutListener(new FirstLayoutListener());
// for tweet
mAvatar = (ImageView) findViewById(R.id.avatar);
mScreenName = (TextView) findViewById(R.id.screen_name);
mText = (EditText) findViewById(R.id.text);
mLocationMarker = findViewById(R.id.location_marker);
// set data to layout...
new AsyncQueryHandler(getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor.moveToNext()) {
Picasso.with(ComposeTweetActivity.this)
.load(cursor.getString(cursor.getColumnIndex(User.avatar_large)))
.placeholder(R.drawable.error)
.error(R.drawable.error)
.into(mAvatar);
mScreenName.setText("@" + cursor.getString(cursor.getColumnIndex(User.screen_name)));
}
cursor.close();
}
}.startQuery(0, null,
CatnutProvider.parse(User.MULTIPLE, mApp.getAccessToken().uid),
new String[]{User.avatar_large, User.screen_name}, null, null, null);
// other stuffs...
mText.addTextChangedListener(this);
}
public void getContactNameAsyncAndPost(@NonNull final Record record, final TextView textView) {
String cachedContactName = mMemoryCacheHelper.getMemoryCacheForContactsName(record.getNumber());
if (cachedContactName != null) {
textView.setText(cachedContactName);
record.setName(cachedContactName);
} else {
AsyncQueryHandler asyncQueryHandler = new AsyncQueryHandler(mContentResolver) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
try {
if (cursor != null && cursor.moveToFirst()) {
mCursorLogger.log(cursor);
int contactNameRow = cursor.getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME);
String contactName = cursor.getString(contactNameRow);
if (contactName != null && contactName.length() > 0) {
record.setName(contactName);
textView.setText(contactName);
record.setName(contactName);
}
}
} catch (Exception e) {
Log.d(TAG, "Error: --> ", e);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
};
Uri contactUri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI,
Uri.encode(record.getNumber()));
String[] projection = {ContactsContract.PhoneLookup.DISPLAY_NAME};
asyncQueryHandler.startQuery(0, null, contactUri, projection, null, null, null);
}
}
/**
* create and insert db record using a real contact information.
*
* @param contactID - the target contact id. If id = -1 then get a random one
*/
public void createDemoRecord(long contactID) {
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
// TODO: 17.05.2017 @contact_ID
String[] projection =
{
ContactsContract.PhoneLookup.CONTACT_ID,
// ContactsContract.CommonDataKinds.Phone._ID, //the same as phonelookup_ID
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER
};
String selection = contactID != 0 ? ContactsContract.PhoneLookup.CONTACT_ID + " = ?" : null;
String[] selectionArguments = contactID != 0
? new String[]{String.valueOf(contactID)} : null;
String orderBy = ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC";
AsyncQueryHandler asyncQueryHandler = new AsyncQueryHandler(mContext.getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor.getCount() == 0) {
// createDummyRecord(mContext);
return;
}
mCursorLogger.log(cursor);
if (cursor.getCount() == 1) {
cursor.moveToFirst();
} else {
int random = generateNumber(cursor.getCount() - 1, 0);
cursor.moveToPosition(random);
}
Contact contact = new MicroOrm().fromCursor(cursor, Contact.class);
// long contact_id = cursor.getLong(cursor.getColumnIndex(ContactsContract.PhoneLookup.CONTACT_ID));
// String contact_number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
ContentValues values = new ContentValues();
// values.put(RecordDbContract.RecordItem.COLUMN_ID, String.valueOf(generateNumber(10000, 5000)));
values.put(RecordDbContract.RecordItem.COLUMN_PATH, mConstant.DEMO_PATH);
values.put(RecordDbContract.RecordItem.COLUMN_DATE, generateDate());
values.put(RecordDbContract.RecordItem.COLUMN_NUMBER, contact.getNumber());
values.put(RecordDbContract.RecordItem.COLUMN_CONTACT_ID, contact.get_ID());
values.put(RecordDbContract.RecordItem.COLUMN_SIZE, generateNumber(100, 1));
values.put(RecordDbContract.RecordItem.COLUMN_DURATION, generateNumber(100, 1));
values.put(RecordDbContract.RecordItem.COLUMN_IS_INCOMING, generateBoolean());
values.put(RecordDbContract.RecordItem.COLUMN_IS_LOVE, generateBoolean());
values.put(RecordDbContract.RecordItem.COLUMN_IS_LOCKED, generateBoolean());
values.put(RecordDbContract.RecordItem.COLUMN_IS_TO_DELETE, generateBoolean());
mRecordsQueryHandler.startInsert(RecordsQueryHandler.INSERT_DEMO, null, RecordDbContract.CONTENT_URL, values);
}
};
// retrieve all contacts
asyncQueryHandler.startQuery(0, null, uri, projection, selection, selectionArguments, orderBy);
}
@Override
protected void init() {
listView = (ListView) findViewById(R.id.listView);
adapter = new CommonAdapter<String>(this, data, android.R.layout.simple_list_item_1) {
@Override
protected void fillData(ViewHolder holder, int position) {
((TextView) holder.getView(android.R.id.text1)).setText(data.get(position));
}
};
listView.setAdapter(adapter);
asyncHandler = new AsyncQueryHandler(getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor != null) {
while (cursor.moveToNext()) {
String number = cursor.getString(1);
if (TextUtils.isEmpty(number))
continue;
String name = cursor.getString(0);
long date = cursor.getLong(2);
int duration = cursor.getInt(3);
duration = duration < 0 ? 0 : duration;
int type = cursor.getInt(4);
String v;
if (name == null || name.trim().length() == 0 || name.equalsIgnoreCase("null"))
v = String.format(Locale.getDefault(), "%s\n%s %d%s %s",
number, format.format(new Date(date)),
duration < 60 ? duration : duration / 60,
duration < 60 ? "分钟" : "小时",
type == CallLog.Calls.INCOMING_TYPE ? "打入" : "拨出");
else
v = String.format(Locale.getDefault(), "%s %s\n%s %d%s %s",
name, format.format(new Date(date)), number,
duration < 60 ? duration : duration / 60,
duration < 60 ? "分钟" : "小时",
type == CallLog.Calls.INCOMING_TYPE ? "打入" : "拨出");
data.add(v);
}
cursor.close();
adapter.notifyDataSetChanged();
}
}
};
if (Build.VERSION_CODES.JELLY_BEAN <= Build.VERSION.SDK_INT)
checkPermission();
else
asyncLoadData();
}
private void prepareDrawer() {
// for drawer
mActionBar.setDisplayHomeAsUpEnabled(true);
mActionBar.setHomeButtonEnabled(true);
// for user' s profile
new AsyncQueryHandler(getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor.moveToNext()) {
mNick = cursor.getString(cursor.getColumnIndex(User.screen_name));
mTextNick.setText(mNick);
Picasso.with(MainActivity.this)
.load(cursor.getString(cursor.getColumnIndex(User.avatar_large)))
.placeholder(R.drawable.error)
.error(R.drawable.error)
.into(mProfileCover);
TextView location = (TextView) findViewById(R.id.location);
location.setText(cursor.getString(cursor.getColumnIndex(User.location)));
String description = cursor.getString(cursor.getColumnIndex(User.description));
mDescription.setText(TextUtils.isEmpty(description) ? getString(R.string.no_description) : description);
View flowingCount = findViewById(R.id.following_count);
CatnutUtils.setText(flowingCount, android.R.id.text1, cursor.getString(cursor.getColumnIndex(User.friends_count)));
CatnutUtils.setText(flowingCount, android.R.id.text2, getString(R.string.followings));
View flowerCount = findViewById(R.id.followers_count);
CatnutUtils.setText(flowerCount, android.R.id.text1, cursor.getString(cursor.getColumnIndex(User.followers_count)));
CatnutUtils.setText(flowerCount, android.R.id.text2, getString(R.string.followers));
View tweetsCount = findViewById(R.id.tweets_count);
tweetsCount.setOnClickListener(MainActivity.this);
flowingCount.setOnClickListener(MainActivity.this);
flowerCount.setOnClickListener(MainActivity.this);
CatnutUtils.setText(tweetsCount, android.R.id.text1, cursor.getString(cursor.getColumnIndex(User.statuses_count)));
CatnutUtils.setText(tweetsCount, android.R.id.text2, getString(R.string.tweets));
}
cursor.close();
}
}.startQuery(
0, null,
CatnutProvider.parse(User.MULTIPLE, mApp.getAccessToken().uid),
new String[]{
User.screen_name,
User.avatar_large,
User.description,
User.statuses_count,
User.followers_count,
User.friends_count,
User.verified,
User.location
},
null, null, null
);
}