默认重写bulkInsert方法
@Override
public int bulkInsert(Uri uri, ContentValues[] values) {
return super.bulkInsert(uri, values);
}
bulkInsert()方法内部实现
/**
* Override this to handle requests to insert a set of new rows, or the
* default implementation will iterate over the values and call
* {@link #insert} on each of them.
* As a courtesy, call {@link ContentResolver#notifyChange(android.net.Uri ,android.database.ContentObserver) notifyChange()}
* after inserting.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* @param uri The content:// URI of the insertion request.
* @param values An array of sets of column_name/value pairs to add to the database.
* This must not be {@code null}.
* @return The number of values that were inserted.
*/
public int bulkInsert(Uri uri, ContentValues[] values) {
int numValues = values.length;
for (int i = 0; i < numValues; i++) {
insert(uri, values[i]);
}
return numValues;
}
重写bulkInsert() – 事务处理
/**
* 批量插入,调用方法如下:
*
* ContentValues[] arrayValues = new ContentValues[10];
* //实例化每一个ContentValues
* int count = resolver.bultInsert(Student.CONTENT_URI,arrayValues);
*
* @param uri
* @param values
* @return
*/
@Override
public int bulkInsert(Uri uri, ContentValues[] values) {
//return super.bulkInsert(uri, values);
int numValues = 0;
db.beginTransaction(); //开始事务
try {
//数据库操作
numValues = values.length;
for (int i = 0; i < numValues; i++) {
insert(uri, values[i]);
}
db.setTransactionSuccessful(); //别忘了这句 Commit
} finally {
db.endTransaction(); //结束事务
}
return numValues;
}